Welding equipment for power battery casings

Abstract

This invention relates to the field of battery casing welding technology, and more particularly to a welding device for power battery casings. The feeding device is adapted to move between a loading position and a feeding position, as well as between a feeding position and a unloading position. A flipping feeding device is located at the feeding position, and the flipping feeding device is equipped with a flipping platform, which includes opposing gripping and placing working surfaces and a welding working surface. A welding robot is located to the side of the flipping feeding device. This invention uses a PLC controller to control the feeding device to achieve automatic feeding and unloading of battery casing workpieces. The PLC controller or the flipping feeding device controls the flipping of the battery casing workpieces to achieve automatic welding of the weld seams, either through the PLC controller or by the welding robot. Sensors enable precise identification of the weld seams. The overall process is applicable to large workpieces, with a compact structure, simple design, good compatibility, and simple loading and unloading, offering high efficiency. It eliminates the need for high-precision fixing fixtures, automating a high-precision, highly automated battery casing welding process.

Description

Technical Field

[0001] This invention relates to the field of battery casing welding technology, and more particularly to a welding device for power battery casings. Background Technology

[0002] Most battery casings on the market are manufactured through three main methods: casting, machining, and stamping. Among these, stamping is the primary method for manufacturing power battery casings. For battery casings with a shallow depth, they are usually formed directly by cold stamping. For battery casings with a deeper depth, they typically require extrusion forming, friction stir welding, sawing or stamping, CNC machining, and finally welding of the bent profiles and plates. In the welding process, the profiles and plates are usually positioned in a fixture and then welded together using a welding device.

[0003] In the process of welding power battery casing profiles and plates, traditional welding equipment generally uses clamps for fixing and clamping before welding the seams, which requires high precision in the tooling and clamping. Due to the large size and weight of the power battery casing, it is not easy to flip it over during the welding process, which leads to production safety issues. Moreover, the welding of power battery casings requires high precision in the weld seams, but when traditional welding equipment welds power battery casings, the numerous weld seams and large deformation after welding result in poor welding precision, making it difficult to assemble the battery casing later and affecting the efficiency of welding production. Summary of the Invention

[0004] This invention provides a welding device for power battery casings, which solves the above-mentioned defects in the welding process of power battery casings in the prior art, and realizes fast, efficient and precise welding of power battery casings.

[0005] This invention provides a welding device for a power battery casing, comprising a feeding device, a flipping and loading device, a welding robot, and a PLC controller. The feeding device is used to load the battery casing workpiece. The flipping and loading device is equipped with a flipping platform, which includes opposing gripping and loading surfaces and a welding surface. The welding robot is movably disposed to the side of the flipping and loading device and is used to perform weld seam welding on the battery casing workpiece on the welding surface. The PLC controller is electrically connected to the feeding device, the flipping and loading device, and the welding robot. The PLC controller controls the transfer of the battery casing workpiece between the gripping and loading surfaces of the flipping and loading device and the feeding device, or the PLC controller controls the welding robot to perform weld seam welding on the welding surface of the flipping and loading device.

[0006] According to the present invention, a welding device for a power battery casing is provided, wherein the welding robot is equipped with a sensor electrically connected to the PLC controller for acquiring weld information of the battery casing.

[0007] According to the present invention, a welding device for a power battery casing is provided, wherein a plurality of electromagnets are arranged on the flipping platform, the plurality of electromagnets forming a magnetic attraction matrix, wherein when the electromagnets are energized and magnetized, they pick up the battery casing workpiece, and when the electromagnets are de-energized and demagnetized, they release the battery casing workpiece; and / or, a plurality of vacuum suction cups are arranged on the flipping platform, the plurality of vacuum suction cups forming a vacuum suction cup matrix, wherein when the vacuum suction cups are in a vacuum suction state, they pick up the battery casing workpiece, and when the vacuum suction cups are in a blowing and deflating state, they release the battery casing.

[0008] According to the present invention, a welding device for a power battery casing is provided, wherein two bosses are symmetrically arranged on the feeding device, and a recessed cavity is formed between the two bosses.

[0009] According to the present invention, a welding device for a power battery casing includes a flipping and feeding device comprising two opposing uprights, and the two ends of the flipping platform are rotatably connected to the two uprights so that the flipping platform can flip between the two uprights to realize the conversion between the gripping and feeding working surface and the welding working surface.

[0010] According to the present invention, a welding device for a power battery casing is provided, wherein the flipping platform includes a platform body and connecting members disposed at both ends of the platform body, the connecting members are rotatably connected to the upright, the connecting members are provided with vertical guide rails, and the platform body is slidably connected to the vertical guide rails.

[0011] According to the present invention, a welding device for a power battery casing is provided, wherein a walking guide rail parallel to the flipping platform is provided on the side of the flipping loading device, and a walking truss is movably arranged on the walking guide rail; the walking truss is an L-shaped truss structure, including a vertical frame vertically connected to the walking guide rail and a transverse frame facing the flipping platform; the welding robot is movably arranged on the transverse frame and can move along the extension direction of the transverse frame.

[0012] According to a welding device for a power battery casing provided by the present invention, a cleaning gun and wire cutter is provided on the side of the vertical frame facing the flipping platform, and the cleaning gun and wire cutter is used to clean the welding robot.

[0013] According to the present invention, a welding device for a power battery casing is provided. The welding device for the power battery casing further includes a fence that encloses a welding area. The flipping feeding device and the welding robot are both located within the welding area. An opening is provided on one side of the fence, and the moving path of the feeding device passes through the opening of the fence. A plurality of grating sensors are provided on the fence, and the grating sensors are used to obtain the positions of the feeding device and the welding robot.

[0014] According to the present invention, a welding device for a power battery casing is provided, wherein multiple flipping and feeding devices are arranged side by side, and each flipping and feeding device is correspondingly equipped with a feeding device and a welding robot.

[0015] The welding equipment for power battery casings provided by this invention uses a PLC controller to control a feeding device to automatically load and unload power battery casing workpieces, and a PLC controller to control a flipping feeding device to automatically flip the power battery casing workpieces for automatic station switching. The PLC controller also controls a welding robot to automatically position and weld the weld seam. The overall process is applicable to large workpieces, with a compact structure, simple design, good compatibility, and easy loading and unloading, offering high efficiency. It eliminates the need for high-precision fixing fixtures, automating a highly flexible, high-precision, and highly automated battery casing welding process. It establishes a standardized welding station model, effectively guiding the welding process for battery casings. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure of the welding equipment for the power battery casing provided by the present invention.

[0018] Figure 2 This is a side view of the welding equipment for the power battery casing provided by the present invention.

[0019] Figure 3 This is a schematic diagram of the feeding device provided by the present invention.

[0020] Figure 4 This is a schematic diagram of the structure of a power battery casing.

[0021] Figure 5 This is a front view of the power battery casing.

[0022] Figure 6 This is a schematic diagram of the assembly of the feeding device and the power battery casing workpiece provided by the present invention.

[0023] Figure 7 This is one of the structural schematic diagrams of the flipping feeding device provided by the present invention.

[0024] Figure 8 This is the second structural schematic diagram of the flipping feeding device provided by the present invention.

[0025] Reference numerals: 1. Feeding device; 11. Boss; 12. Recessed cavity; 13. Laser tracker; 2. Tilting and loading device; 21. Tilting platform; 211. Platform body; 212. Connector; 213. Vertical guide rail; 22. Electromagnet; 23. Frame; 3. Welding robot; 4. Walking guide rail; 5. Walking truss; 6. Cleaning gun and wire cutter; 7. Fence; 8. Grating sensor. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0027] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the present invention.

[0028] In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present invention based on the specific circumstances.

[0029] In embodiments of the present invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0030] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0031] The following is combined with Figures 1 to 8 The specific structure and working process of the welding equipment for the power battery casing of the present invention are described.

[0032] One embodiment of the present invention provides a welding device for a power battery casing, see below. Figure 1 and Figure 2 As shown, the system includes a feeding device 1, a tilting and loading device 2, a welding robot 3, and a PLC controller. The feeding device 1 is used to load battery casing workpieces and is adapted to move between a loading position and a loading position, as well as between a loading position and a unloading position. The tilting and loading device 2 is located at the loading position and is equipped with a tilting platform 21. The tilting platform 21 includes opposing gripping and releasing working surfaces and a welding working surface. The gripping and releasing working surface transfers the battery casing workpieces between itself and the feeding device 1, while the welding working surface performs weld seam welding on the battery casing workpieces. The welding robot 3 is movably positioned to the side of the tilting and loading device 2 and is used to perform weld seam welding on the welding working surface of the battery casing workpieces. The PLC controller is electrically connected to the feeding device 1, the tilting and loading device 2, and the welding robot 3. The PLC controller controls the transfer of battery casing workpieces between the gripping and releasing working surface of the tilting and loading device 2 and the feeding device 1, or controls the welding robot 3 to perform weld seam welding on the welding working surface of the tilting and loading device 2.

[0033] It is understood that the welding equipment for power battery casings in this embodiment can perform automated welding of power battery casings. Specifically, the power battery casing workpiece is placed on the feeding device 1 at the loading position. The feeding device 1 moves from the loading position to the loading position. After the feeding device 1 reaches the loading position, the flipping platform 21 on the flipping loading device 2 grabs the battery casing workpiece on the feeding device 1. When the battery casing workpiece is on the flipping loading device 2, the flipping platform 21 starts to flip. The flipping platform 21 flips 180° so that the battery casing workpiece faces the welding robot 3. The welding robot 3 performs weld seam welding on the battery casing workpiece. After the welding is completed, the flipping platform 21 flips 180° again and then releases the battery casing workpiece. The battery casing workpiece falls into the feeding device 1. The feeding device 1 moves from the loading position to the unloading position to unload, completing the entire welding process.

[0034] In this embodiment, the entire welding process is automated through a PLC controller. The PLC controller is electrically connected to the feeding device 1, allowing it to move from the loading position to the unloading position. A sensor can be installed on the feeding device 1. When the feeding device 1 is in the loading position and detects a battery casing workpiece, it transmits a signal to the PLC controller, which then moves the feeding device 1 to the unloading position. At the unloading position, the PLC controller controls a flipping unloading device 2 to pick up the workpiece from the feeding device 1. Once the sensor on the feeding device 1 detects no battery casing workpiece, the unloading process is complete. The flipping unloading device 2... The power battery casing workpiece is flipped from bottom to top by the flipping platform 21. At this time, the PLC controller controls the welding robot 3 to weld the power battery casing workpiece. After welding, the PLC controller controls the flipping platform 21 of the flipping feeding device 2 to flip again. The power battery casing workpiece is flipped from top to bottom by the flipping platform 21. The flipping platform 21 releases the power battery casing workpiece, and the power battery casing workpiece falls onto the feeding device 1. After the sensor on the feeding device 1 senses the power battery casing workpiece, the transportation and unloading work is started. The PLC controller controls the feeding device 1 to move from the feeding position to the unloading position to unload, completing the automatic control of the entire welding process.

[0035] It is important to understand that when the PLC controller controls the welding robot 3 to weld the power battery casing workpiece, the sensors on the welding robot 3 can first scan and locate the weld seam information of the power battery casing workpiece. The weld seam information includes at least one of the following: weld seam position information and size information. The sensors on the welding robot 3 include at least a weld seam laser tracker and a 3D vision sensor. The weld seam laser tracker can obtain the weld seam position information of the power battery casing, and the 3D vision sensor can obtain the weld seam size information. By combining the weld seam laser tracker and the 3D vision sensor, the position and size information of the weld seam are obtained simultaneously, and the information is transmitted to the PLC controller. The PLC controller can adjust the welding position of the welding robot 3 according to the weld seam position and size information to perform weld seam welding on the power battery casing workpiece.

[0036] The welding equipment for the power battery casing in the above embodiments uses a PLC controller to control the feeding device 1 to automatically load and unload the power battery casing workpiece, and a PLC controller to control the flipping feeding device 2 to flip the power battery casing workpiece for automatic station switching. The PLC controller also controls the welding robot 3 to automatically position and weld the weld seam. The overall process is applicable to large workpieces, with a compact structure, simple design, good compatibility, and simple loading and unloading, resulting in high efficiency. It does not require the use of high-precision fixing fixtures and automatically realizes a highly flexible, high-precision, and highly automated battery casing welding process. It establishes a standardized welding station model and effectively guides the welding process ideas for battery casings.

[0037] In some embodiments of a welding device for a power battery casing according to the present invention, a plurality of electromagnets 22 are provided on a flipping platform 21, and the plurality of electromagnets 22 form a magnetic attraction matrix. When the electromagnets 22 are energized and magnetized, they pick up the battery casing workpiece, and when the electromagnets 22 are de-energized and demagnetized, they release the battery casing workpiece.

[0038] It is understood that the flipping platform 21 is used to grip and flip the power battery casing workpiece. Therefore, the flipping platform 21 can be any device that can achieve clamping. In this embodiment, multiple electromagnets 22 are set on the flipping platform 21. The electromagnets 22 are used to magnetically grip and demagnetize the battery casing workpiece to achieve the transfer and flipping of the battery casing workpiece. Specifically, an electromagnet 22 is installed through the flipping platform 21. The electromagnet 22 can extend and retract vertically to magnetically grasp battery casing workpieces on opposite surfaces of the flipping platform 21. It should be understood that, through the magnetic attraction of the electromagnet 22 in conjunction with the flipping of the flipping platform 21, two battery casing workpieces can be processed simultaneously. After one battery casing workpiece is attracted to the flipping platform 21, the flipping platform 21 flips the battery casing workpiece to the top for welding. Meanwhile, the lower surface of the flipping platform 21 can magnetically attract the next battery casing workpiece. After the upper battery casing workpiece is welded, the flipping platform 21 flips again to flip the lower battery casing workpiece to the top for welding. The battery casing workpiece that was originally welded at the top is flipped to the bottom and transported to the unloading position by the feeding device 1.

[0039] It should be understood that the magnetic attraction and flipping process of the electromagnet 22 can effectively connect the welding processes of the two battery casing workpieces, speeding up the welding efficiency of the battery casing workpieces. At the same time, since the electromagnet 22 can extend and retract vertically, it can effectively pick up battery casing workpieces with different bottom depths, making it more versatile.

[0040] In the above embodiments, the electromagnet 22 can pick up and release power battery casing workpieces that can be magnetically attracted. For some aluminum alloy battery casings, in other embodiments, a vacuum chuck (not shown in the figure) can be provided. Specifically, multiple vacuum chucks can be provided on the flipping platform 21, forming a vacuum chuck matrix. When the vacuum chuck is in a vacuum suction state, it picks up the battery casing workpiece; when the vacuum chuck is in a blow-out state, it releases the battery casing. It can be understood that the vacuum chuck and electromagnet 22 can be set up independently to pick up and release power battery casings of corresponding materials. Similarly, the vacuum chuck and electromagnet 22 can be combined for use, so that a single flipping platform 21 can pick up and release power battery casings of different materials.

[0041] In other embodiments of a welding apparatus for a power battery casing according to the present invention, see [link to relevant documentation]. Figure 3 As shown, two bosses 11 are symmetrically arranged on the feeding device 1, and a recessed cavity 12 is formed between the two bosses 11.

[0042] It should be understood that the specific structure of the battery casing component can be found in [reference needed]. Figure 4 and Figure 5As shown, the workpiece has a back and a front. Some workpieces may have protruding cylinders or other protrusions on the back. In this embodiment, the feeding device 1, through the setting of the boss 11 and the recessed cavity 12, allows the battery casing workpiece to be installed on the feeding device 1 from both the front and back sides. The protrusions of the battery casing workpiece can face upwards. Figure 6 (as shown) or facing downwards within the recessed cavity 12 (not shown in the figure).

[0043] In some specific examples, the feeding device 1 can be an Automated Guided Vehicle (AGV) or a Rail-Guided Vehicle (RGV). An AGV is an unmanned automated vehicle equipped with automatic guidance devices such as magnetic strips, tracks, or lasers, which travels along a planned path. Powered by batteries, it is equipped with safety protection and various auxiliary mechanisms (such as transfer and assembly mechanisms). Under the monitoring and task scheduling of a PLC controller, the AGV can accurately travel along the prescribed path, moving from the loading position to the unloading position or vice versa, and completing a series of tasks upon reaching the designated location. A Rail-Guided Vehicle (RGV), also called a rail-guided shuttle, can be designed to move from the loading position to the unloading position and vice versa. Controlled by a PLC controller, it facilitates the rail-guided transfer of battery casing workpieces.

[0044] In the structure of a welding device for a power battery casing according to the present invention, the flipping and feeding device 2, in addition to gripping and releasing the battery casing workpiece, also flips the battery casing workpiece. See some specific embodiments. Figure 7 As shown, the flipping and feeding device 2 includes two opposing uprights 23. The two ends of the flipping platform 21 are rotatably connected to the two uprights 23 so that the flipping platform 21 can flip between the two uprights 23 to realize the conversion between the gripping and placing working surface and the welding working surface.

[0045] It is understood that in the above embodiment, a rotating mechanism is set on two opposing uprights 23. The rotating mechanism can be controlled by a PLC controller. The two ends of the flipping platform 21 are respectively connected to the rotating structure. By controlling the rotation of the rotating mechanism through the PLC controller, the flipping platform 21 can be flipped up and down.

[0046] Specifically, in some examples, see Figure 8As shown, the flipping platform 21 includes a platform body 211 and connectors 212 disposed at both ends of the platform body 211. A rotating mechanism is disposed on the side of the upright 23 facing the flipping platform 21, and the connectors 212 are rotatably connected to the rotating mechanism of the upright 23. Furthermore, a vertical guide rail 213 is disposed on the connector 212, and the platform body 211 is slidably connected to the vertical guide rail 213. In this example, in addition to rotating with the connector 212 to complete the flipping, the platform body 211 can also move up and down relative to the connector 212 under the guidance of the vertical guide rail 213. This can effectively adjust the vertical height of the platform body 211 according to the different bottom depths of the battery casing workpiece, so as to more effectively pick up the battery casing workpiece.

[0047] In some embodiments of a welding device for a power battery casing according to the present invention, a walking guide rail 4 parallel to the flipping platform 21 is provided on the side of the flipping feeding device 2, and a walking truss 5 is movably arranged on the walking guide rail 4; the walking truss 5 is an L-shaped truss structure, including a vertical frame vertically connected to the walking guide rail 4 and a transverse frame facing the flipping platform 21; the welding robot 3 is movably arranged on the transverse frame and can move along the extension direction of the transverse frame.

[0048] It is understood that in the welding equipment for the power battery casing of this embodiment, the welding robot 3 moves relative to the weld position on the power battery casing via the walking guide rail 4 and the walking truss 5. Since the welding robot 3 is mounted on the walking truss 5, the movement of the walking truss 5 on the walking guide rail 4 allows the welding robot 3 to move along the length of the power battery casing. Furthermore, the welding robot 3 can move along the transverse frame of the walking truss 5, allowing it to move along the width of the power battery casing. This length and directional movement of the welding robot 3 relative to the power battery casing, combined with the weld laser tracker, enables welding of any position on the power battery casing.

[0049] Furthermore, based on the above embodiments, in this embodiment, a torch cleaning and wire cutter 6 is provided on the side of the vertical frame facing the tilting platform 21. The torch cleaning and wire cutter 6 is used to clean the welding robot 3. The torch cleaning and wire cutter 6 integrates torch cleaning, wire cutting, and oil spraying (anti-spatter liquid) functions. It can start cleaning work after the welding robot 3 has finished welding, cleaning the spatter generated during the automatic welding process of the welding robot 3 that sticks to the gas protective sleeve of the welding torch, ensuring that the gas flows smoothly for a long time, effectively preventing air from entering the welding area, protecting the weld pool and improving the weld quality. The torch cleaning and wire cutter 6 can also clean the dust generated by welding fumes on the contact nozzle, clean the gas outlet on the connecting pipe, spray the protective sleeve with cleaning agent, reduce the dead adhesion of welding slag to the nozzle and contact nozzle, and increase durability.

[0050] In other embodiments of a welding apparatus for a power battery casing according to the present invention, see again Figure 1 As shown, the welding equipment for the power battery casing also includes a fence 7, which encloses the welding area. The flipping feeding device 2 and the welding robot 3 are both located within the welding area. An opening is provided on one side of the fence 7, and the moving path of the feeding device 1 passes through the opening of the fence 7. Multiple grating sensors 8 are provided on the fence 7, which are used to obtain the positions of the feeding device 1 and the welding robot 3.

[0051] It is understandable that the welding process of the power battery casing generates fumes, noise, spatter, and arc light, which can harm the health of workers. In this embodiment, the welding equipment for the power battery casing is equipped with a fence 7, which encloses the welding work area and blocks fumes, noise, spatter, and arc light. Workers do not need to enter the welding work area; the entire welding process is automated by the machine, achieving human-machine isolation. See also... Figure 1 The fence 7 is equipped with multiple grating sensors 8, mainly along the moving path of the feeding device 1 and the moving truss 5. The positioning of the device is achieved by assembling a laser tracker in conjunction with the grating sensors 8. Taking the feeding device 1 as an example, a laser tracker 13 (e.g., ...) is installed on the feeding device 1. Figure 3 As shown, two grating sensors 8 are installed along the path of the feeding device 1 from the loading position to the unloading position, one at the point where turning is required and the other at the point where it enters the welding work area. The laser tracker 13, in conjunction with the grating sensors 8, can accurately locate the time it takes for the feeding device 1 to pass through key positions, thus coordinating with the PLC controller to execute corresponding control commands, such as turning or emergency stop. Similarly, two grating sensors 8 are also installed along the path of the feeding device 1 from the unloading position to the unloading position to locate key positions of the battery casing workpiece after welding, before it reaches the unloading position.

[0052] In some specific embodiments of the welding equipment for power battery casings provided by the present invention, multiple flip-feed devices 2 are provided, arranged side by side, and each flip-feed device 2 is equipped with a feeding device 1 and a welding robot 3. It is understood that the welding equipment for power battery casings in this embodiment can be configured as multiple workstations arranged side by side, forming a large-scale, high-rate-of-use welding process line with 10, 20, or even 200 robots, for example... Figure 1 The image shows two workbenches side by side.

[0053] The structures in the embodiments of the welding equipment for power battery casings provided by the present invention can be combined to form new technical solutions. In some specific examples, the welding equipment for power battery casings of the present invention can perform the following specific process: An automated guided vehicle (AGV) is used for feeding. A recessed cavity 12 is formed on the AGV, allowing the battery casing workpiece to be placed face down, avoiding the lower cylinder of the workpiece. After loading the battery casing workpiece, the AGV moves from the loading position to the feeding position, reaching the flipping feeding device 2. The electromagnet 22 array on the flipping platform 21 of the flipping feeding device 2 automatically extends according to the front or back of the battery casing workpiece. The AGV lifts the battery casing workpiece upwards, and the electromagnets 22 contact the battery casing workpiece loaded on the AGV to pick it up. After the electromagnets 22 pick up the battery casing workpiece, the AGV exits. The flipping platform 21 rotates 180° with the battery casing workpiece, changing the battery casing workpiece from a downward orientation to an upward orientation; welding... The robot moves above the battery casing workpiece and uses a weld laser tracker to visually scan the weld seam, obtaining its position and size information for precise welding. During welding, the AGV can still carry a second battery casing workpiece and move it below the tilting platform 21. The AGV lifts the second battery casing workpiece upwards, and the electromagnet 22 contacts the battery casing workpiece on the AGV to pick it up. After the electromagnet 22 picks up the battery casing workpiece, the AGV exits. After the first battery casing workpiece is welded, the tilting platform 21 rotates 180°, changing the first battery casing workpiece from an upward to a downward orientation, and the second battery casing workpiece from a downward to an upward orientation. Welding of the second battery casing workpiece begins, the AGV pallet rises, the electromagnet 22 automatically de-energizes and demagnetizes, and the first battery casing workpiece falls onto the AGV. The AGV, carrying the welded first battery casing workpiece, moves from the loading position to the unloading position.

[0054] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A welding device for a power battery casing, characterized in that, include: Feeding device (1) is used to load battery casing workpieces; A flipping feeding device (2) is provided with a flipping platform (21), which includes opposing gripping and placing working surfaces and welding working surfaces; A welding robot (3) is movably positioned to the side of the flipping and feeding device (2) for welding the battery casing workpiece on the welding working surface; The PLC controller is electrically connected to the feeding device (1), the flipping feeding device (2), and the welding robot (3), respectively. The PLC controller controls the transfer of the battery casing workpiece between the gripping working surface of the flipping feeding device (2) and the feeding device (1), or the PLC controller controls the welding robot (3) to perform weld welding on the welding working surface of the flipping feeding device (2). The flipping and feeding device (2) includes two opposing uprights (23). The two ends of the flipping platform (21) are rotatably connected to the two uprights (23) so that the flipping platform (21) can flip between the two uprights (23) to realize the conversion between the gripping and releasing working surface and the welding working surface. The flipping platform (21) is provided with multiple electromagnets (22), which form a magnetic attraction matrix. When the electromagnets (22) are energized and magnetized, they attract the battery housing workpiece. When the electromagnets (22) are de-energized and demagnetized, they release the battery housing workpiece. The flipping platform (21) includes a platform body (211) and connectors (212) at both ends of the platform body (211). The connectors (212) are rotatably connected to the stand (23). The connectors (212) are provided with vertical guide rails (213). The platform body (211) is slidably connected to the vertical guide rails (213), so that the platform body (211) can rotate with the connectors (212) and move up and down relative to the connectors (212) under the guidance of the vertical guide rails (213) to adjust the height of the platform body (211) according to the different bottom depths of the battery housing workpiece. The fence (7) encloses the welding area. The flipping feeding device (2) and the welding robot (3) are both located in the welding area. An opening is provided on one side of the fence (7). The moving path of the feeding device (1) passes through the opening of the fence (7). Multiple grating sensors (8) are provided on the fence (7). The grating sensors (8) are used to obtain the positions of the feeding device (1) and the welding robot (3). The feeding device (1) is symmetrically provided with two bosses (11), and a recessed cavity (12) is formed between the two bosses (11). The flipping and loading device (2) is provided with a walking guide rail (4) parallel to the flipping platform (21) on its side, and a walking truss (5) is movably arranged on the walking guide rail (4); the walking truss (5) is an L-shaped truss structure, including a vertical frame vertically connected to the walking guide rail (4) and a horizontal frame facing the flipping platform (21); the welding robot (3) is movably arranged on the horizontal frame and can move along the extension direction of the horizontal frame on the horizontal frame.

2. The welding equipment for the power battery casing according to claim 1, characterized in that, The welding robot (3) is equipped with a sensor that is electrically connected to the PLC controller to obtain the weld information of the battery casing.

3. The welding equipment for the power battery casing according to claim 1, characterized in that, A gun cleaning and wire cutting device (6) is provided on the side of the vertical frame facing the flipping platform (21). The gun cleaning and wire cutting device (6) is used to clean and cut the wires of the welding robot (3).

4. The welding equipment for the power battery casing according to any one of claims 1 to 3, characterized in that, Multiple flip-feed devices (2) are provided, and multiple flip-feed devices (2) are arranged side by side. Each flip-feed device (2) is equipped with a feeding device (1) and a welding robot (3).

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