Cylindrical battery tab welding device

Abstract

The utility model relates to the technical field of cylindrical battery tab welding, and provides a cylindrical battery tab welding device. The cylindrical battery tab welding device comprises a positioning assembly and an abutting assembly, a positioning groove is formed in one side of the positioning assembly in the horizontal direction, the positioning groove penetrates through the upper surface of the positioning assembly, the positioning groove is provided with a positioning face used for positioning a to-be-welded piece, the positioning face is an arc face, and the projection of the positioning face on the horizontal plane is semicircular or inferior arc-shaped. The abutting assembly comprises a pressing head, and the pressing head is located above the positioning groove and used for abutting against the to-be-welded piece. The positioning groove is formed in one side of the positioning assembly in the horizontal direction, so that the to-be-welded part can enter or leave the positioning groove in the horizontal direction, the to-be-welded part can be conveniently taken and placed, and the welding efficiency is effectively improved. And the positioning surface is constructed into the arc surface, so that the positioning surface is adaptive to the cylindrical battery, and the cylindrical battery is positioned.

Description

Technical Field

[0001] The utility model relates to the technical field of cylindrical battery tab welding, in particular to a cylindrical battery tab welding device. Background Art

[0002] The cylindrical battery tab welding device is mainly used for welding tabs and current collectors. In the related art, the cylindrical battery tab welding device includes a positioning assembly, a pressing assembly and a welding assembly. Among them, the positioning assembly is in a cylindrical shape. Before welding, the workpieces to be welded, namely the battery cell and the current collector, are placed in the positioning assembly, and the workpieces to be welded are pressed tightly in the positioning assembly by the pressing assembly. Finally, the welding assembly emits laser and acts on the workpieces to be welded, so as to realize the welding of the tabs on the battery cell and the current collector. However, in the above-mentioned cylindrical battery tab welding device, the taking and placing of the workpieces to be welded are not convenient, resulting in a reduction in welding efficiency. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a cylindrical battery tab welding device, aiming to solve the technical problem of low welding efficiency of the cylindrical battery tab welding device in the related art.

[0004] The present application provides a cylindrical battery tab welding device, which includes a positioning assembly and a pressing assembly. A positioning groove is formed on one side of the positioning assembly in the horizontal direction, and the positioning groove penetrates the upper surface of the positioning assembly. The positioning groove has a positioning surface for positioning the workpieces to be welded, and the positioning surface is an arc surface. The projection of the positioning surface on the horizontal plane is a semicircle or a minor arc. The pressing assembly includes a pressing head, and the pressing head is located above the positioning groove and is used for pressing the workpieces to be welded.

[0005] Optionally, the cylindrical battery tab welding device further includes a workbench, a mounting plate and a driving assembly. The mounting plate is connected to the workbench, the positioning assembly is fixedly connected to the mounting plate, and the driving assembly is installed on the workbench and is used to move the workpieces to be welded and the pressing head closer to or away from each other.

[0006] Optionally, the mounting plate is provided with a mounting hole, and the mounting hole penetrates the upper and lower surfaces of the mounting plate. The driving assembly is located below the mounting hole, and the mounting hole is used to expose the workpieces to be welded so that the driving assembly can drive the workpieces to be welded closer to or away from the pressing head.

[0007] Optionally, the positioning groove penetrates the lower surface of the positioning assembly.

[0008] Optionally, the positioning assembly includes a positioning member and a supporting member. The positioning member is fixedly connected in the mounting hole, and the positioning member is provided with a positioning groove that penetrates the upper and lower surfaces of the positioning member. The supporting member is fixedly connected to the lower end of the positioning groove.

[0009] Optionally, the supporting member is provided with a through groove for avoiding the driving assembly, and the through groove penetrates the upper and lower surfaces of the supporting member. The wall surface of the through groove is an arc surface.

[0010] Optionally, the mounting hole includes a first hole section and a second hole section, the radius of the second hole section is greater than that of the first hole section, and the positioning member is fixedly connected within the first hole section.

[0011] Optionally, a groove is formed on the upper surface of the mounting plate, and the groove is located on one side of the positioning component where the positioning groove is formed.

[0012] Optionally, the groove penetrates through the lower surface of the mounting plate.

[0013] Optionally, a guide rail extending in the horizontal direction is fixedly connected to the workbench, and the mounting plate is slidably connected to the guide rail.

[0014] Optionally, a limiting member for limiting the mounting plate is fixedly connected to the workbench.

[0015] Optionally, the pressing component is arranged on the workbench with its horizontal position adjustable.

[0016] Optionally, the pressing component further includes a fastening member and a fixing seat fixedly connected to the pressing head. A waist-shaped hole is formed in the workbench, and a threaded hole is formed in the fixing seat. Among them, the fastening member passes through the waist-shaped hole and is threadedly connected to the threaded hole.

[0017] Optionally, the driving component includes a cylinder and a floating joint. The cylinder is installed on the workbench, and the cylinder is drivingly connected to the floating joint to move the floating joint, so that the workpiece to be welded and the pressing head approach or move away from each other.

[0018] The beneficial effects of the cylindrical battery tab welding device provided by the present utility model are as follows: The pressing head is located above the workpiece to be welded. Along the up and down direction, the pressing head and the workpiece to be welded can approach or move away from each other. By providing a positioning groove on one side of the positioning component in the horizontal direction, the workpiece to be welded can enter or leave the positioning groove from the horizontal direction, which facilitates the picking and placing of the workpiece to be welded, thereby effectively improving the welding efficiency. Constructing the positioning surface into an arc surface is to adapt to the cylindrical battery to achieve the positioning of the cylindrical battery. During welding, the pressing head presses the workpiece to be welded, and the laser acts on the workpiece to be welded, thus realizing the welding of the tab and the current collector plate. Description of the Drawings

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0020] Figure 1 It is a schematic structural diagram of the cylindrical battery tab welding device provided by the embodiment of the present utility model;

[0021] Figure 2 The rear view of the cylindrical battery tab welding device provided by the embodiment of the present utility model;

[0022] Figure 3 The schematic structural diagram of the mounting plate, the positioning assembly and the workpiece to be welded after assembly provided by the embodiment of the present utility model;

[0023] Figure 4 The exploded view of the workpiece to be welded provided by the embodiment of the present utility model;

[0024] Figure 5 The schematic structural diagram of the mounting plate and the positioning assembly after assembly provided by the embodiment of the present utility model;

[0025] Figure 6 is Figure 5 The enlarged view of A in

[0026] Figure 7 The schematic structural diagram of the mounting plate provided by the embodiment of the present utility model;

[0027] Figure 8 is Figure 7 The enlarged view of B in

[0028] Figure 9 The schematic structural diagram of the positioning assembly provided by the embodiment of the present utility model;

[0029] Figure 10 The schematic structural diagram of the waist-shaped hole provided by the embodiment of the present utility model;

[0030] Figure 11 Another schematic structural diagram of the cylindrical battery tab welding device provided by the embodiment of the present utility model.

[0031] Among them, the reference numerals in the figure:

[0032] 100, cylindrical battery tab welding device; 10, positioning assembly; 20, pressing assembly;

[0033] 30, workbench; 40, mounting plate; 50, driving assembly;

[0034] 60, frame; 70, protective cover; 11, positioning member;

[0035] 12, support member; 111, positioning groove; 112, mounting protrusion;

[0036] 121, through groove; 21, pressing head; 22, fixed seat;

[0037] 211, laser hole; 221, connecting plate; 222, column;

[0038] 31. Waist-shaped hole; 32. Guide rail; 33. Limiting member;

[0039] 311. Second support boss; 41. Mounting hole; 42. Groove;

[0040] 411. First hole section; 412. Second hole section; 4111. First support boss;

[0041] 4112. Avoidance groove; 4113. Mounting groove; 51. Cylinder;

[0042] 52. Floating joint; 61. Floor footing; 62. Universal wheel;

[0043] 63. First button; 64. Second button; 71. Through hole;

[0044] 200. Battery cell; 300. Housing; 400. Tab;

[0045] 500. Current collector plate; 600. Cover body. Detailed implementation manners

[0046] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present utility model, but should not be construed as a limitation to the present utility model.

[0047] Reference to "one embodiment" or "an embodiment" throughout the specification means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present application. Thus, the phrases "in one embodiment" or "in some embodiments" appearing throughout the specification do not necessarily refer to the same embodiment. Additionally, in one or more embodiments, the particular features, structures, or characteristics may be combined in any suitable manner.

[0048] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model.

[0049] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features.

[0050] In the present utility model, unless otherwise clearly specified and defined, terms such as "installed", "connected", "coupled", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can 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 present utility model can be understood according to specific circumstances.

[0051] Please refer to Figures 1 to 11 , and now the cylindrical battery tab welding device 100 in the embodiments of the present utility model will be described.

[0052] Please refer to Figures 1 to 4 , the cylindrical battery tab welding device 100 provided in the present application includes a positioning assembly 10 and a pressing assembly 20. The positioning assembly 10 is provided with a positioning groove 111 on one side in the horizontal direction, and the positioning groove 111 penetrates the upper surface of the positioning assembly 10. The positioning groove 111 has a positioning surface for positioning the workpiece to be welded, and the positioning surface is an arc surface. The projection of the positioning surface on the horizontal plane is semi-circular or inferior arc-shaped. The pressing assembly 20 includes a pressing head 21, and the pressing head 21 is located above the positioning groove 111 for pressing the workpiece to be welded.

[0053] Specifically, the horizontal direction is the direction perpendicular to the up and down direction, and the front-back direction and the left-right direction both belong to the horizontal direction. In this embodiment, the positioning groove 111 is opened at the rear side of the positioning assembly 10, that is, the opening of the positioning groove 111 faces backward. The pressing head 21 is provided with a laser hole 211, and the laser hole 211 penetrates the upper and lower surfaces of the pressing head 21 for the laser to pass through. Generally, a battery includes a housing 300, a battery cell 200, a cover 600, etc. The battery cell 200 is accommodated in the housing 300, and the cover 600 is hermetically connected to one end of the housing 300 to keep the inside of the housing 300 in a sealed state. The workpiece to be welded mentioned in the present application includes the housing 300, the battery cell 200, the tab 400, and the current collector plate 500. The battery cell 200 is located inside the housing 300 and has a certain gap with the inner wall of the housing 300. The tab 400 is placed on the end face of the battery cell 200, the current collector plate 500 is placed on the tab 400, and one side of the current collector plate 500 is connected to the cover 600. Of course, in some other embodiments, the workpiece to be welded may not include the housing 300, which depends on the actual situation.

[0054] The indenter 21 is located above the workpiece to be welded. In the up-and-down direction, the indenter 21 and the workpiece to be welded can approach or move away from each other. By providing a positioning groove 111 on one side of the positioning assembly 10 in the horizontal direction, the workpiece to be welded can enter or leave the positioning groove 111 from the horizontal direction, facilitating the picking and placing of the workpiece to be welded and thus effectively improving the welding efficiency. The positioning surface is configured as an arc surface to fit a cylindrical battery for positioning the cylindrical battery. During welding, the indenter 21 presses the workpiece to be welded, and the laser passes through the laser hole 211 on the indenter 21 and acts on the workpiece to be welded, thus realizing the welding of the tab 400 and the current collector plate 500.

[0055] The horizontal plane is a plane perpendicular to the up-and-down direction. The projection of the positioning surface on the horizontal plane is defined as projection A. Projection A can be semi-circular or minor-arc-shaped, as long as it can play a positioning role. Preferably, projection A is semi-circular, so as to improve the positioning effect of the positioning assembly 10 on the workpiece to be welded.

[0056] In another embodiment of the present application, please refer to Figure 1 and Figure 2 , the cylindrical battery tab welding device 100 further includes a workbench 30, a mounting plate 40, and a driving assembly 50. The mounting plate 40 is connected to the workbench 30, the positioning assembly 10 is fixedly connected to the mounting plate 40, and the driving assembly 50 is mounted on the workbench 30 and is used to make the workpiece to be welded and the indenter 21 approach or move away from each other. Specifically, the mounting plate 40 is connected to the upper surface of the workbench 30, and the positioning assembly 10 is located between the mounting plate 40 and the indenter 21. Using the driving assembly 50 to automatically drive the workpiece to be welded and the indenter 21 to approach or move away from each other can reduce labor and improve the welding quality.

[0057] It can be understood that the pressing assembly 20 can be mounted on the workbench 30 or on other components. In addition, the driving assembly 50 can drive only the workpiece to be welded, or only the indenter 21, or can drive both the workpiece to be welded and the indenter 21 at the same time, which is not limited herein.

[0058] In another embodiment of the present application, please refer to Figure 3 , Figure 5 , Figure 7 and Figure 8 , the mounting plate 40 is provided with a mounting hole 41 that penetrates the upper and lower surfaces of the mounting plate 40. The driving assembly 50 is located below the mounting hole 41, and the mounting hole 41 is used to expose the workpiece to be welded so that the driving assembly 50 can drive the workpiece to be welded to approach or move away from the indenter 21.

[0059] Specifically, the driving component 50 includes a fixed end and a telescopic end. The fixed end is fixedly connected to the workbench 30, and the telescopic end is arranged upward and slidably connected to the fixed end. When welding a welding piece, the telescopic end extends out and passes through the mounting hole 41 to press the workpiece to be welded against the pressing head 21. After the welding operation is completed, the telescopic end retracts, and the workpiece to be welded descends under its own gravity, and the workpiece to be welded gradually moves away from the pressing head 21.

[0060] In the above embodiment, the driving component 50 only drives the workpiece to be welded, while the pressing head 21 is fixedly arranged. With such an arrangement, the problem of virtual welding or over-welding of the workpiece to be welded can be reduced, which is specifically reflected in that: the height of the battery cell 200 has a tolerance fluctuation, that is, the heights of multiple battery cells 200 are not the same. If the driving component 50 drives the pressing head 21 instead of the workpiece to be welded, the height of the contact surface between the pressing head 21 and the workpiece to be welded will change, that is, the distance at which the laser acts on the workpiece to be welded will change, and the laser is sensitive to the focal length. Therefore, the welding quality of some workpieces to be welded is good, some workpieces to be welded are virtually welded, and some workpieces to be welded are over-welded. If the driving component 50 only drives the workpiece to be welded, then even if the height of the battery cell 200 changes, the contact surface between the battery cell 200 and the pressing head 21 can finally remain on the same horizontal plane. Therefore, the problem of virtual welding or over-welding of the workpiece to be welded can be reduced.

[0061] In another embodiment of the present application, please refer to Figure 9 , the positioning groove 111 penetrates through the lower surface of the positioning component 10. With such an arrangement, the area of the lower surface of the positioning component 10 can be reduced, so that the telescopic end of the driving component 50 can contact the workpiece to be welded with a larger surface. In this way, the contact area between the telescopic end of the driving component 50 and the battery cell 200 can be increased, so that the battery cell 200 is uniformly stressed, the possibility of damage to the battery cell 200 is reduced, and the depression degree of the end face of the battery cell 200 is reduced.

[0062] It can be understood that the workpiece to be welded can be placed on the mounting plate 40 or in the positioning component 10, which is not limited herein. In this embodiment, please refer to Figure 5 、 Figure 6 and Figure 9, the positioning component 10 includes a positioning member 11 and a support member 12. The positioning member 11 is fixedly connected to the installation hole 41. The positioning member 11 is provided with a positioning groove 111 that penetrates the upper and lower surfaces of the positioning member 11. The support member 12 is fixedly connected to the lower end of the positioning groove 111. Specifically, the positioning groove 111 is provided at the rear side of the positioning member 11, that is, the opening of the positioning groove 111 faces backward, and the workpiece to be welded is placed on the support member 12. The positioning member 11 is fixedly connected to the wall surface of the installation hole 41. The wall surface of the installation hole 41 has a certain positioning function, which can make the axis of the positioning surface collinear with the axis of the installation hole 41 as much as possible, which is beneficial to improving the welding quality. If the axis of the positioning surface deviates from the axis of the installation hole 41, then in the horizontal direction, the telescopic end of the driving component 50 will deviate from the central area of the battery cell 200. In this way, when the telescopic end of the driving component 50 jacks up the battery cell 200 and the current collector plate 500 and presses them tightly against the pressing head 21, the battery cell 200 and the current collector plate 500 may be welded in an inclined posture, resulting in a decrease in welding quality.

[0063] In some embodiments, the positioning member 11 is fixedly connected to the wall surface of the installation hole 41 by welding to reduce the assembly difficulty of the positioning member 11. Of course, in some other embodiments, the positioning member 11 can be fixed to the wall surface of the installation hole 41 by means of clamping, threaded connection, etc., which is not limited herein.

[0064] In some embodiments, the support member 12 is fixedly connected to the lower end of the positioning groove 111 by welding, which is beneficial to reducing the assembly difficulty of the support member 12. Of course, in some other embodiments, the support member 12 can be fixed to the lower end of the positioning groove 111 by means of clamping, threaded connection, etc., and the support member 12 can also be integrally formed with the positioning member 11, which is not limited herein.

[0065] In another embodiment of the present application, please refer to Figure 9 , the cross-section of the positioning member 11 is in a semi-circular ring shape. Compared with forming the positioning groove 111 on a cube, the foregoing setting can reduce the material consumption of the positioning member 11 and reduce the cost.

[0066] In another embodiment of the present application, please refer to Figure 5 and Figure 6 , the support member 12 is provided with a through groove 121 for avoiding the driving component 50. The through groove 121 penetrates the upper and lower surfaces of the support member 12, and the wall surface of the through groove 121 is an arc surface. The through groove 121 is used for the telescopic end of the driving component 50 to pass through. The telescopic end of the driving component 50 passes through the installation hole 41 and the through groove 121 in sequence to press the workpiece to be welded tightly against the pressing head 21. The cross-section of the support member 12 is in a semi-circular ring shape. Setting the through groove 121 to penetrate the upper and lower surfaces of the support member 12 can increase the contact area between the telescopic end of the driving component 50 and the battery cell 200, and reduce the possibility of damage to the battery cell 200.

[0067] In another embodiment of the present application, please refer to Figure 6 and Figure 8 , a first support boss 4111 is formed by protruding the lower end of the wall surface of the mounting hole 41. The first support boss 4111 is in a semi-circular ring shape and is used to support the positioning member 11. The setting of the first support boss 4111 facilitates the welding of the positioning member 11 to the wall surface of the mounting hole 41 while improving the installation accuracy of the positioning member 11, thereby improving the positioning accuracy of the workpiece to be welded, and further improving the welding effect of the workpiece to be welded.

[0068] In another embodiment of the present application, please refer to Figure 6 and Figure 8 , an avoidance groove 4112 is formed on the wall surface of the mounting hole 41. The avoidance groove 4112 is located above the first support boss 4111. The bottom wall of the avoidance groove 4112 extends to the upper surface of the first support boss 4111. The first support boss 4111 has two side walls in the radial direction of the mounting hole 41. Along the radial direction of the mounting hole 41, the avoidance groove 4112 penetrates through the two side walls of the first support boss 4111. It can be understood that when the first support boss 4111 is machined by a tool, a fillet will be formed at the connection between the mounting hole 41 and the first support boss 4111, that is, the wall surface of the mounting hole 41 and the upper surface of the first support boss 4111 are connected by an arc surface. Although the fillet is relatively small, it will also interfere with the positioning member 11 and affect the assembly accuracy of the positioning member 11. The setting of the avoidance groove 4112 can reduce the influence of the mounting plate 40 on the positioning member 11, which is beneficial to improving the assembly accuracy of the positioning member 11, thereby improving the positioning accuracy of the workpiece to be welded, and further improving the welding effect of the workpiece to be welded.

[0069] In some embodiments, please refer to Figure 6 and Figure 8 , a mounting groove 4113 is formed on the upper surface of the first support boss 4111, and a mounting protrusion 112 is provided on the bottom surface of the positioning member 11. The mounting protrusion 112 is inserted into the mounting groove 4113. The mounting protrusion 112 is in a ring shape to facilitate the formation of the mounting protrusion 112 on the semi-circular ring-shaped positioning member 11, and the mounting groove 4113 is also in a ring shape to be adaptively inserted with the mounting protrusion 112. The mounting groove 4113 can play a positioning role for the positioning member 11, which is beneficial to improving the assembly accuracy of the positioning member 11.

[0070] In another embodiment of the present application, please refer to Figure 5, the mounting hole 41 includes a first hole section 411 and a second hole section 412. The radius of the second hole section 412 is greater than that of the first hole section 411, and the positioning member 11 is fixedly connected within the first hole section 411. Specifically, both the first hole section 411 and the second hole section 412 are semi-circular holes. A first support boss 4111 is formed at the lower end of the first hole section 411, and an avoidance groove 4112 is provided on the wall surface of the first hole section 411. It can be understood that the telescopic end of the driving assembly 50 needs to be as large as possible. If the telescopic end of the driving assembly 50 is too small, then its contact surface with the battery cell 200 will be too small, and the force on the battery cell 200 will be relatively large, easily causing damage to the battery cell 200. Configuring the radius of the second hole section 412 to be greater than that of the first hole section 411 can make the telescopic end of the driving assembly 50 as large as possible while reducing the possibility of interference between the second hole section 412 and it.

[0071] In another embodiment of the present application, please refer to Figure 3 , a groove 42 is provided on the upper surface of the mounting plate 40. The groove 42 is located on the side of the positioning assembly 10 where the positioning groove 111 is provided. Specifically, the positioning groove 111 is provided at the rear side of the positioning assembly 10, so the groove 42 is provided at the rear side of the mounting plate 40. The groove 42 penetrates through the rear surface and the lower surface of the mounting plate 40, which can effectively reduce the weight. It should be noted that the cylindrical battery tab welding device 100 of the present application will weld the workpiece to be welded twice, one for the welding of the positive tab and the other for the welding of the negative tab. Therefore, the end of the battery cell 200 with the cover 600 will be supported on the first support boss 4111. In this way, the cover 600 is likely to come into contact with the mounting plate 40, resulting in contamination of the cover 600. For example, if dust on the mounting plate 40 adheres to the cover 600, the self-discharge of the battery will increase, and in severe cases, it will cause a short circuit, affecting the performance of the battery. By providing the groove 42 on the mounting plate 40, it is possible to prevent the cover 600 from directly contacting the mounting plate 40, effectively reducing the possibility of the aforementioned problems occurring.

[0072] The shape of the groove 42 can be square, circular or other shapes, as long as the groove 42 can accommodate the cover 600, and it is not limited here.

[0073] In another embodiment of the present application, please refer to Figure 1 and Figure 2 , a guide rail 32 extending in the horizontal direction is fixedly connected to the workbench 30, and the mounting plate 40 is slidably connected to the guide rail 32. Specifically, there are two guide rails 32, and the two guide rails 32 are arranged at intervals and both extend in the front-rear direction. The left and right ends of the mounting plate 40 are respectively slidably connected to the two guide rails 32. Configuring the mounting plate 40 to be movable relative to the workbench 30 so that the mounting plate 40 can move relative to the pressing head 21 can further improve the convenience for the staff to pick up and place the workpiece to be welded.

[0074] In another embodiment of the present application, please refer to Figure 1 and Figure 2 , a limiting member 33 for limiting the mounting plate 40 is fixedly connected to the workbench 30. There are two limiting members 33, and one limiting member 33 is arranged beside each guide rail 32. The arrangement of the limiting member 33 can ensure that the mounting plate 40 moves in place, so as to ensure that the workpiece to be welded moves in place, and further ensure the welding quality of the workpiece to be welded. The present application does not particularly limit the shape of the limiting member 33, which can be a cube, a cylinder or other shapes, as long as it can play a limiting role.

[0075] In another embodiment of the present application, please refer to Figure 1 , the pressing assembly 20 is arranged on the workbench 30 with adjustable position in the horizontal direction. With such an arrangement, it is convenient to debug the welding position to ensure the welding quality of the workpiece to be welded.

[0076] In another embodiment of the present application, please refer to Figure 1 , the pressing assembly 20 further includes a fastening member and a fixing seat 22 fixedly connected to the pressing head 21. The workbench 30 is provided with a waist-shaped hole 31, and the fixing seat 22 is provided with a threaded hole. Specifically, the fastening member passes through the waist-shaped hole 31 and is threadedly connected to the threaded hole. Specifically, the waist-shaped hole 31 penetrates through the upper and lower surfaces of the workbench 30 in the up and down direction, and the threaded hole is opened on the bottom surface of the fixing seat 22. The fastening member passes through the waist-shaped hole 31 from below the workbench 30 and is threadedly connected to the threaded hole on the fixing seat 22. Compared with adjusting the position of the fixing seat 22 by means of a linear motor module, a hydraulic cylinder, etc., the foregoing adjusting method has a simple structure and low cost.

[0077] The fastening member can be a bolt, a screw, etc., as long as it can be threadedly connected to the threaded hole, and no limitation is made here.

[0078] In another embodiment of the present application, please refer to Figure 10 , a second supporting boss 311 for supporting the fixing seat 22 is formed by the lower end of the wall surface of the waist-shaped hole 31, and the fixing seat 22 is slidably adapted to the waist-shaped hole 31. The second supporting boss 311 surrounds and forms a hole for the fastening member to pass through, and this hole is also of a waist-shaped hole structure. With such an arrangement, the assembly accuracy of the fixing seat 22 can be improved, so as to ensure that the pressing head 21 can accurately press on the appropriate position of the workpiece to be welded, and further ensure the welding quality of the workpiece to be welded.

[0079] In another embodiment of the present application, please refer to Figure 1, the fixing base 22 includes a connecting plate 221 and columns 222 fixedly connected to the lower side of the connecting plate 221. The pressing head 21 is fixedly connected to the connecting plate 221. There are four columns 222, and the four columns 222 are respectively located at the four corners of the connecting plate 221. Two waist-shaped holes 31 are provided on the workbench 30. The two waist-shaped holes 31 are arranged at intervals and both extend in the front-rear direction. The two columns 222 located at the left end of the connecting plate 221 are supported on the second support boss 311 in one of the waist-shaped holes 31, and the two columns 222 are slidably adapted to this waist-shaped hole 31. The two columns 222 located at the right end of the connecting plate 221 are supported on the second support boss 311 in the other waist-shaped hole 31, and the two columns 222 are slidably adapted to this waist-shaped hole 31. With such a setting, the assembly accuracy of the fixing base 22 can be further improved.

[0080] In another embodiment of the present application, please refer to Figure 2 , the driving assembly 50 includes a cylinder 51 and a floating joint 52. The cylinder 51 is installed on the workbench 30. The cylinder 51 is drivingly connected to the floating joint 52 to move the floating joint 52, so that the workpiece to be welded and the pressing head 21 approach or move away from each other. Specifically, the cylinder 51 includes a cylinder block and a telescopic rod slidably connected to the cylinder block. The cylinder 51 is a prior art and will not be elaborated here. The floating joint 52 is fixedly connected to the end of the telescopic rod away from the cylinder block. Among them, the cylinder block is the fixed end of the aforementioned driving assembly 50, the cylinder block is installed on the workbench 30, and the telescopic rod and the floating joint 52 are the telescopic ends of the aforementioned driving assembly 50. When welding the workpiece to be welded, the cylinder 51 drives the floating joint 52 to move upward. The floating joint 52 sequentially passes through the mounting hole 41 on the mounting plate 40 and the through groove 121 on the support member 12, and presses the battery cell 200 against the pressing head 21. The floating joint 52 has a buffering effect and can reduce the damage degree of the battery cell 200.

[0081] In another embodiment of the present application, please refer to Figure 11 , the cylindrical battery tab welding device 100 of the present application further includes a frame 60 and a protective cover 70 provided above the frame 60. The protective cover 70 is in a cube shape and its right end is open. The protective cover 70 is formed by enclosing sheet metal. The protective cover 70 is used to protect the positioning assembly 10, the pressing assembly 20, etc. The workbench 30 is placed in the protective cover 70. A through hole 71 for the laser to pass through is opened at the top of the protective cover 70. During work, the laser sequentially passes through the through hole 71 of the protective cover 70 and the laser hole 211 of the pressing head 21, and finally acts on the workpiece to be welded.

[0082] In some embodiments, a lighting lamp is installed on the top wall of the protective cover 70 to facilitate the work of the staff at night.

[0083] In another embodiment of the present application, please refer to Figure 11, the bottom surface of the frame 60 is provided with floor feet 61 and universal wheels 62. The arrangement of the universal wheels 62 facilitates the movement of the staff to move the cylindrical battery tab welding device 100. The arrangement of the floor feet 61 is to fix the frame 60 to prevent the cylindrical battery tab welding device 100 from moving during work.

[0084] In another embodiment of the present application, please refer to Figure 11 , the frame 60 is provided with a first button 63 and a second button 64. Among them, the first button 63 is used to control the telescopic rod of the cylinder 51 to extend, so as to drive the floating joint 52 to jack up the battery cell 200. The second button 64 is used to control the telescopic rod of the cylinder 51 to retract, so that the floating joint 52 descends, and the battery cell 200 descends under its own gravity and finally supports on the support member 12.

[0085] The present application also provides a method for welding cylindrical battery tabs, and the method includes the following steps:

[0086] S1. Prepare the housing 300 and the battery cell 200, and place the battery cell 200 inside the housing 300 to obtain a combined body in this way;

[0087] S2. Place the combined body on the support member 12, and use the positioning member 11 to position the housing 300;

[0088] S3. Take the positive tab and the current collector plate 500 connected with the cover body 600, place the positive tab on the battery cell 200, and place the current collector plate 500 on the positive tab;

[0089] S4. Manually push the mounting plate 40 forward until the mounting plate 40 contacts the limiting member 33;

[0090] S5. Press the first button 63, the cylinder 51 drives the floating joint 52 to move upward, and presses the battery cell 200, the positive tab and the current collector plate 500 tightly on the pressure head 21;

[0091] S6. Start the welding assembly to weld the battery cell 200, the positive tab and the current collector plate 500;

[0092] S7. After welding is completed, press the second button 64, the cylinder 51 resets, the floating joint 52 resets, and the battery cell 200 supports on the support member 12;

[0093] S8. Manually push the mounting plate 40 backward, take out the combined body and then turn the combined body over, that is, the end of the battery cell 200 welded with the current collector plate 500 is downward, and then place the combined body on the support member 12, and use the positioning member 11 to position the housing 300;

[0094] S9. Take the negative electrode tab, place the negative electrode tab on the battery cell 200, and then repeat steps S4 to S7 once. In the area, different from step S5, the floating joint 52 presses the battery cell 200 and the negative electrode tab tightly against the pressure head 21. After the air cylinder 51 and the floating joint 52 are reset, manually push the mounting plate 40 backward to take out the assembly.

[0095] In this way, the welding of the cylindrical battery electrode tab is realized. In this method, the housing 300 is specifically placed in the positioning groove 111. There is a certain gap between the battery cell 200 and the housing 300, and the housing 300 has a certain thickness. In order to ensure that the current collector is welded as close as possible to the center of the battery cell 200, the housing 300 also needs to be placed in, and the distance between the current collector and the housing 300 should be ensured, otherwise short circuits are likely to occur.

[0096] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A cylindrical battery tab welding device, characterized in that: include: A positioning component (10), wherein a positioning groove (111) is provided on one side of the positioning component (10) in a horizontal direction, the positioning groove (111) passes through the upper surface of the positioning component (10), the positioning groove (111) has a positioning surface for positioning a workpiece to be welded, the positioning surface is an arc surface, and the projection of the positioning surface on the horizontal plane is semicircular or inferior arc; The pressing assembly (20) comprises a pressing head (21), wherein the pressing head (21) is located above the positioning groove (111) and is used for pressing the workpiece to be welded.

2. The cylindrical battery tab welding device according to claim 1, characterized in that: It also includes a workbench (30), a mounting plate (40) and a driving assembly (50), wherein the mounting plate (40) is connected to the workbench (30), the positioning assembly (10) is fixedly connected to the mounting plate (40), and the driving assembly (50) is installed on the workbench (30) and is used to move the workpiece to be welded and the pressure head (21) closer to or farther away from each other.

3. The cylindrical battery tab welding device according to claim 2, characterized in that: The mounting plate (40) is provided with a mounting hole (41), the mounting hole (41) passes through the upper and lower surfaces of the mounting plate (40), the driving component (50) is located below the mounting hole (41), and the mounting hole (41) is used to expose the workpiece to be welded, so that the driving component (50) drives the workpiece to be welded to approach or move away from the pressure head (21); The positioning groove (111) passes through the lower surface of the positioning assembly (10).

4. The cylindrical battery tab welding device according to claim 3, characterized in that: The positioning assembly (10) comprises a positioning member (11) and a supporting member (12); the positioning member (11) is fixedly connected in the mounting hole (41); the positioning member (11) is provided with a positioning groove (111); the positioning groove (111) runs through the upper and lower surfaces of the positioning member (11); and the supporting member (12) is fixedly connected to the lower end of the positioning groove (111); The support member (12) is provided with a through slot (121) for avoiding the driving assembly (50); the through slot (121) penetrates the upper and lower surfaces of the support member (12); and the wall surface of the through slot (121) is an arc surface.

5. The cylindrical battery tab welding device according to claim 4, characterized in that: The mounting hole (41) comprises a first hole section (411) and a second hole section (412); the radius of the second hole section (412) is greater than the radius of the first hole section (411); and the positioning member (11) is fixedly connected in the first hole section (411).

6. The cylindrical battery tab welding device according to claim 2, characterized in that: The upper surface of the mounting plate (40) is provided with a groove (42), and the groove (42) is located on a side of the positioning assembly (10) on which the positioning groove (111) is provided; The groove (42) passes through the lower surface of the mounting plate (40).

7. The cylindrical battery tab welding device according to claim 2, characterized in that: A guide rail (32) extending in a horizontal direction is fixedly connected to the workbench (30), and the mounting plate (40) is slidably connected to the guide rail (32).

8. The cylindrical battery tab welding device according to claim 7, characterized in that: A limiting member (33) for limiting the position of the mounting plate (40) is fixedly connected to the workbench (30).

9. The cylindrical battery tab welding device according to claim 2, characterized in that: The pressing assembly (20) is arranged on the workbench (30) in an adjustable manner along the horizontal direction; The pressing assembly (20) further comprises a fastener and a fixing seat (22) fixedly connected to the pressing head (21); the workbench (30) is provided with a waist-shaped hole (31); the fixing seat (22) is provided with a threaded hole; wherein the fastener passes through the waist-shaped hole (31) and is threadedly connected to the threaded hole.

10. The cylindrical battery tab welding device according to claim 2, characterized in that: The driving assembly (50) comprises a cylinder (51) and a floating joint (52), wherein the cylinder (51) is mounted on the workbench (30), and the cylinder (51) is drivingly connected to the floating joint (52) so as to move the floating joint (52), thereby making the workpiece to be welded and the pressure head (21) approach or move away from each other.

Images