Battery tab and top cover welding device

Abstract

The utility model relates to a battery tab and top cover welding device, which relates to the technical field of tab welding, and comprises a machine base, a laser welding piece and a base are arranged on the machine base, a lifting assembly is arranged between the machine base and the laser welding piece, and the lifting assembly is used for enabling the laser welding piece to move along the height direction of the machine base. A moving assembly is arranged between the machine base and the base and used for enabling the base to move in the length direction of the machine base, a workbench is arranged on the base, a rotating assembly is arranged between the workbench and the base, and the rotating assembly is used for enabling the workbench to rotate on the base. The utility model has the effect of reducing the welding production cost of the battery tab and the battery top cover.

Description

Technical Field

[0001] The utility model relates to the technical field of tab welding, in particular to a welding device for battery tabs and a top cover. Background Technique

[0002] In the production process of batteries, in order to reduce the internal resistance of the batteries, a core with multiple layers of aluminum foil tabs is usually used. The welding quality of the tabs and the top cover is one of the key factors determining the quality of the finished battery products and the production efficiency of battery production.

[0003] In the related art, a Chinese patent with the authorization announcement number CN219465059U provides a laser composite welding device applicable to multiple layers of aluminum foil tabs. It includes a workbench, a gantry is installed on the workbench, a laser welding part is movably arranged on the gantry, a support bottom plate is installed below the laser welding part, the support bottom plate is movably connected to the workbench, first telescopic cylinders are installed at both ends of the upper surface of the support bottom plate, a positioning plate is commonly installed between the first telescopic cylinders, clamping arms are installed at the ends of the telescopic rods of the first telescopic cylinders, and copper cups are installed at the ends of the clamping arms. The battery top cover is placed on the positioning plate, then multiple layers of aluminum foil are placed on the battery top cover, and then the first telescopic cylinders drive the clamping arms to press down, so that the copper cups press the aluminum foil tightly. Then the support bottom plate and the laser welding part move, so that the laser welding part is located above the battery top cover. Then the laser welding part welds the aluminum foil and the battery top cover, and after the welding is completed, the laser welding part moves upward.

[0004] In the process of implementing this application, the inventor found that there are at least the following problems in this technology: it is necessary to make the laser welding part move frequently along the gantry, but the overall weight of the laser welding part is relatively heavy, resulting in high energy consumption for driving the movement of the laser welding part, which is not conducive to reducing the production cost of welding the battery tabs and the battery top cover. Content of the Utility Model

[0005] In order to reduce the production cost of welding the battery tabs and the battery top cover, this application provides a welding device for battery tabs and a top cover.

[0006] The welding device for battery tabs and a top cover provided by this application adopts the following technical solutions:

[0007] A welding device for battery tabs and a top cover includes a machine base, a laser welding part and a base are arranged on the machine base, a lifting assembly is arranged between the machine base and the laser welding part, and the lifting assembly is used to make the laser welding part move along the height direction of the machine base. A moving assembly is arranged between the machine base and the base, and the moving assembly is used to make the base move along the length direction of the machine base. A workbench is arranged on the base, and a rotating assembly is arranged between the workbench and the base, and the rotating assembly is used to make the workbench rotate on the base.

[0008] By adopting the above technical solution, when welding the tab on the battery cover plate, place the battery cover plate on the workbench, then the rotating assembly drives the workbench to rotate on the base, and the moving assembly drives the base to move, so that the welding position of the battery cover plate to be welded is moved directly below the laser welding part. After the aluminum foil tab is placed on the welding position of the battery cover plate to be welded, the lifting assembly drives the laser welding part to descend, and the laser welding part welds the aluminum foil tab and the battery cover plate together. After the aluminum foil tab and the battery cover plate are welded, the lifting assembly drives the laser welding part to reset. By adopting the method of driving the workbench to rotate by the rotating assembly, the effect of lateral movement of the laser welding part and the workbench is realized, thus replacing the method of driving the laser welding part to move. Since the overall weight of the workbench and the battery cover plate is lighter than the overall weight of the laser welding part, the energy consumption of the equipment operation is effectively reduced, and the production cost of welding the battery tab and the battery top cover is reduced.

[0009] Preferably, a positioning cylinder is fixedly arranged on the machine base, a positioning arm is fixedly arranged on the output shaft of the positioning cylinder, a positioning pressing plate is fixedly arranged at one end of the positioning arm away from the positioning cylinder, a laser through hole is opened on the positioning pressing plate, and the laser through hole is located below the laser welding part.

[0010] By adopting the above technical solution, when the welding position of the battery cover plate to be welded is moved directly below the laser welding part and the aluminum foil tab is placed on the welding position of the battery cover plate to be welded, the output shaft of the positioning cylinder drives the positioning pressing plate to descend, and the positioning pressing plate presses the aluminum foil tab on the battery cover plate, so that the aluminum foil tab and the battery cover plate are not easily displaced. After the positioning pressing plate presses the aluminum foil tab on the battery cover plate, the laser welding part descends to start working. During the working process of the laser welding part, the laser generated by the laser welding part passes through the laser through hole to weld the aluminum foil tab and the battery cover plate.

[0011] Preferably, the lifting assembly includes a lifting seat, a lifting arm, a lifting motor, a lifting screw rod and a lifting slide rod. The lifting arm is fixedly connected with the laser welding part. The lifting slide rod penetrates through the lifting arm. The bottom end of the lifting slide rod is fixedly connected with the machine base. The top end of the lifting slide rod is fixedly connected with the lifting seat. The lifting motor is fixedly arranged on the top of the lifting seat. The output shaft of the lifting motor penetrates through the lifting seat. The output shaft of the lifting motor is fixedly connected with the top end of the lifting screw rod. The bottom end of the lifting screw rod is rotatably connected with the machine base. The lifting screw rod is in threaded connection with the lifting arm.

[0012] By adopting the above technical solution, the lifting motor drives the lifting screw rod to rotate, the rotation of the lifting screw rod drives the lifting arm to move along the lifting slide rod, and the movement of the lifting arm drives the laser welding part to lift and lower in the height direction.

[0013] Preferably, the moving component includes a moving lead screw and a moving seat. A moving groove is formed on the machine base, and the moving seat is slidably arranged in the moving groove. The moving seat is fixedly connected to the base, the moving lead screw is rotatably arranged in the moving groove, and the moving lead screw is in threaded connection with the moving seat.

[0014] By adopting the above technical solution, the rotation of the moving lead screw drives the moving seat to move along the moving groove, and the moving seat drives the base to move along the length direction of the machine base.

[0015] Preferably, the moving component further includes a moving motor. The moving motor is fixedly arranged in the moving groove. The output shaft of the moving motor is fixedly connected to one end of the moving lead screw, and the other end of the moving lead screw is rotatably connected to the inner wall of the moving groove.

[0016] By adopting the above technical solution, the start of the moving motor drives the moving lead screw to rotate, reducing the situation of manually driving the rotation of the moving lead screw.

[0017] Preferably, the rotating component includes a rotating motor. An installation groove is formed at the top of the base. The rotating motor is fixedly arranged in the installation groove. An installation seat is fixedly arranged on the output shaft of the rotating motor. A positioning protrusion is fixedly arranged at the top of the installation seat. A positioning groove is formed at the bottom of the workbench, and the positioning protrusion is inserted into the positioning groove.

[0018] By adopting the above technical solution, when the positioning protrusion is inserted into the positioning groove, the workbench is plugged on the installation seat, and the workbench and the installation seat are positioned through the positioning protrusion and the positioning groove, making the axes of the workbench, the installation seat and the driving motor coincide, reducing the situation of the workbench being offset. When the rotating motor is started, the installation seat rotates to drive the workbench to rotate.

[0019] Preferably, the rotating component further includes a plurality of balls. A plurality of support grooves are formed at the top of the base. The balls are rotatably arranged in the support grooves, and the balls are in contact with the bottom of the installation seat.

[0020] By adopting the above technical solution, during the rotation of the installation seat driven by the rotating motor, the installation seat and the balls rotate relative to each other. While the balls support the installation seat, the friction between the installation seat and the base is reduced, and the power consumption of the rotating motor is lowered.

[0021] Preferably, a set of locking through holes are formed on the installation seat, locking bolts are inserted into the locking through holes, and a set of locking grooves are formed at the bottom of the workbench. The locking grooves are used for threaded connection with the locking bolts.

[0022] By adopting the above technical solution, after the workbench is plugged on the installation seat, the locking bolts are passed through the locking through holes and threadedly connected with the locking grooves, thereby fixing the workbench on the installation seat.

[0023] In summary, the present application includes at least one of the following beneficial technical effects:

[0024] 1. By providing a machine base, a laser welding part, a base, a lifting assembly, a moving assembly, a workbench and a rotating assembly, and adopting the method of driving the workbench to rotate by the rotating assembly, the effect of the laser welding part and the workbench moving horizontally is realized, thereby replacing the method of driving the laser welding part to move. Since the overall weight of the workbench and the battery cover plate is lighter than the overall weight of the laser welding part, the energy consumption during equipment operation is effectively reduced, and the production cost of welding the battery tab and the battery top cover is decreased;

[0025] 2. By providing a positioning cylinder, a positioning arm, a positioning pressure plate and a laser through hole, the aluminum foil tab and the battery cover plate are not easily misaligned;

[0026] 3. By providing balls and support grooves, the friction between the mounting seat and the base is reduced, and the power consumption of the rotating motor is lowered. Description of the Drawings

[0027] Figure 1 is a schematic structural diagram of a device for welding a battery tab and a top cover in an embodiment of the present application.

[0028] Figure 2 is a schematic diagram showing that the workbench is arranged along the width direction of the machine base in an embodiment of the present application.

[0029] Figure 3 is a schematic diagram showing that the workbench is arranged along the length direction of the machine base in an embodiment of the present application.

[0030] Figure 4 is a cross-sectional view showing the connection relationship between the workbench and the machine base in an embodiment of the present application.

[0031] Figure 5 is a cross-sectional view showing the connection relationship between the positioning pressure plate and the machine base in an embodiment of the present application.

[0032] Description of the reference numerals: 1, machine base; 2, laser welding part; 3, base; 4, lifting assembly; 41, lifting seat; 42, lifting arm; 43, lifting motor; 44, lifting screw; 45, lifting slide bar; 5, moving assembly; 51, moving lead screw; 52, moving seat; 53, moving groove; 54, moving motor; 6, workbench; 7, rotating assembly; 71, rotating motor; 711, mounting groove; 72, ball; 721, support groove; 8, positioning pressure plate; 81, laser through hole; 82, positioning arm; 83, positioning cylinder; 9, mounting seat; 91, positioning protrusion; 911, positioning groove; 92, locking bolt; 921, locking through hole; 922, locking groove. Detailed Embodiments

[0033] The following is combined with the attachedFigures 1-5 Further details of this application will be described below.

[0034] An embodiment of this application discloses a welding device for battery tabs and the top cover. Referring to Figures 1 to 3 , it includes a machine base 1, on which a laser welding component 2 and a base 3 are installed. The laser welding component 2 is located above the base 3. The laser welding component 2 includes an annular spot laser, a galvanometer scanner, a camera, a rangefinder, and a dust removal pipe. The output end of the annular spot laser is connected to the galvanometer scanner through an optical fiber. A lifting component 4 is installed between the machine base 1 and the laser welding component 2, and the lifting component 4 is used to move the laser welding component 2 along the height direction of the machine base 1. A moving component 5 is installed between the machine base 1 and the base 3, and the moving component 5 is used to move the base 3 along the length direction of the machine base 1. A workbench 6 is assembled on the base 3, and a rotating component 7 is installed between the workbench 6 and the base 3. The rotating component 7 is used to rotate the workbench 6 on the base 3. When welding the tab to the battery cover plate, first place the battery cover plate on the workbench 6, then the rotating component 7 drives the workbench 6 to rotate on the base 3, and the moving component 5 drives the base 3 to move, so that the welding position of the battery cover plate is moved directly below the laser welding component 2. After the aluminum foil tab is placed on the welding position of the battery cover plate, the lifting component 4 drives the laser welding component 2 to descend, and the laser welding component 2 welds the aluminum foil tab to the battery cover plate. After the aluminum foil tab and the battery cover plate are welded, the lifting component 4 drives the laser welding component 2 to reset. By using the method of driving the workbench 6 to rotate by the rotating component 7, the effect of the lateral movement between the laser welding component 2 and the workbench 6 is achieved, thus replacing the method of driving the laser welding component 2 to move. Since the overall weight of the workbench 6 and the battery cover plate is lighter than the overall weight of the laser welding component 2, the energy consumption during equipment operation is effectively reduced, and the production cost of welding the battery tab to the battery top cover is decreased.

[0035] In order to prevent the aluminum foil tab and the battery cover plate from being misaligned easily, referring to Figures 1 to 5 , a positioning cylinder 83 is installed on the machine base 1, and a positioning arm 82 is installed on the output shaft of the positioning cylinder 83. A positioning pressing plate 8 is installed at the end of the positioning arm 82 away from the positioning cylinder 83. A laser through hole 81 is opened on the positioning pressing plate 8, and the laser through hole 81 is located below the laser welding component 2. When the welding position of the battery cover plate is moved directly below the laser welding component 2 and the aluminum foil tab is placed on the welding position of the battery cover plate, the output shaft of the positioning cylinder 83 drives the positioning pressing plate 8 to descend, and the positioning pressing plate 8 presses the aluminum foil tab tightly on the battery cover plate, so that the aluminum foil tab and the battery cover plate are not easily misaligned. After the positioning pressing plate 8 presses the aluminum foil tab tightly on the battery cover plate, the laser welding component 2 descends to start the welding work. During the working process of the laser welding component 2, the laser generated by the laser welding component 2 passes through the laser through hole 81 to weld the aluminum foil tab and the battery cover plate. During the movement of the base 3, the base 3 does not need to drive the positioning cylinder 83 to move synchronously.

[0036] To lift the laser welding part 2 in the height direction, refer to Figures 1 to 3 , the lifting assembly 4 includes a lifting base 41, a lifting arm 42, a lifting motor 43, a lifting screw rod 44 and a lifting slide bar 45. The lifting arm 42 is installed on the top of the laser welding part 2, and the lifting slide bar 45 penetrates through the lifting arm 42. The bottom end of the lifting slide bar 45 is welded to the machine base 1, and the top end of the lifting slide bar 45 is welded to the lifting base 41. The lifting motor 43 is installed on the top of the lifting base 41, and the output shaft of the lifting motor 43 penetrates through the lifting base 41. The output shaft of the lifting motor 43 is welded to the top end of the lifting screw rod 44, the bottom end of the lifting screw rod 44 is rotatably connected to the machine base 1, and the lifting screw rod 44 is threadedly connected to the lifting arm 42. The lifting motor 43 drives the lifting screw rod 44 to rotate, the rotation of the lifting screw rod 44 drives the lifting arm 42 to move along the lifting slide bar 45, and the movement of the lifting arm 42 drives the laser welding part 2 to lift in the height direction.

[0037] To move the base 3 along the length direction of the machine base 1, refer to Figures 1 to 4 , the moving assembly 5 includes a moving lead screw 51, a moving seat 52 and a moving motor 54. A moving groove 53 is opened in the machine base 1 along the length direction, the moving seat 52 is slidably arranged in the moving groove 53, and the base 3 is installed on the top of the moving seat 52. The moving motor 54 is installed in the moving groove 53, the output shaft of the moving motor 54 is welded to one end of the moving lead screw 51, the other end of the moving lead screw 51 is rotatably connected to the inner wall of the moving groove 53, and the moving lead screw 51 is threadedly connected to the moving seat 52. When the moving motor 54 is started, it drives the moving lead screw 51 to rotate, the rotation of the moving lead screw 51 drives the moving seat 52 to move along the moving groove 53, and the moving seat 52 drives the base 3 to move along the length direction of the machine base 1.

[0038] To rotate the workbench 6 on the base 3, refer to Figure 1 and Figure 4, the rotating assembly 7 includes a rotating motor 71 and balls 72. An installation groove 711 and a number of support grooves 721 are formed at the top of the base 3. The rotating motor 71 is assembled in the installation groove 711, and the balls 72 are rotatably arranged in the support grooves 721. A mounting seat 9 is welded on the output shaft of the rotating motor 71, and the balls 72 abut against the bottom of the mounting seat 9. A positioning protrusion 91 is fixedly arranged at the top of the mounting seat 9, and a positioning groove 911 is formed at the bottom of the workbench 6 for the positioning protrusion 91 to be inserted. A set of locking through holes 921 are formed in the mounting seat 9, and locking bolts 92 are inserted into the locking through holes 921. A set of locking grooves 922 are formed at the bottom of the workbench 6 for threaded connection with the locking bolts 92. When the positioning protrusion 91 is inserted into the positioning groove 911, the workbench 6 is plugged on the mounting seat 9, and the workbench 6 and the mounting seat 9 are positioned by the positioning protrusion 91 and the positioning groove 911, so that the axes of the workbench 6, the mounting seat 9 and the driving motor coincide, reducing the offset of the workbench 6. After the workbench 6 is plugged on the mounting seat 9, the locking bolts 92 are passed through the locking through holes 921 and threadedly connected with the locking grooves 922, thereby fixing the workbench 6 on the mounting seat 9. When the rotating motor 71 is started, the mounting seat 9 rotates to drive the workbench 6 to rotate. During the process of the rotating motor 71 driving the mounting seat 9 to rotate, the mounting seat 9 and the balls 72 rotate relative to each other. While the balls 72 support the mounting seat 9, the friction between the mounting seat 9 and the base 3 is reduced, and the power consumption of the rotating motor 71 is lowered.

[0039] The implementation principle of a battery tab and top cover welding device according to an embodiment of the present application is as follows: When welding the tab to the battery cover plate, first place the battery cover plate on the workbench 6, then the rotating motor 71 drives the workbench 6 to rotate on the base 3, and the moving motor 54 drives the base 3 to move, so that the welding position of the battery cover plate is moved directly below the laser welding part 2. After the aluminum foil tab is placed on the welding position of the battery cover plate, the lifting motor 43 drives the laser welding part 2 to descend, and the laser welding part 2 welds the aluminum foil tab to the battery cover plate. After the aluminum foil tab and the battery cover plate are welded, the lifting motor 43 drives the laser welding part 2 to reset. By means of the rotating motor 71 driving the workbench 6 to rotate, the effect of the lateral movement of the laser welding part 2 and the workbench 6 is realized, thus replacing the way of driving the laser welding part 2 to move. Since the overall weight of the workbench 6 and the battery cover plate is lighter than the overall weight of the laser welding part 2, and the support and friction reduction are provided by the ball 72, the operating energy consumption of the rotating motor 71 is lower than the operating energy consumption of driving the laser welding part 2 to move. Since the rotating motor 71 is installed on the base 3, the positioning cylinder 83, the positioning arm 82 and the positioning pressing plate 8 for pressing the aluminum foil tab on the battery cover plate are modified on the machine base 1, so that the bottom plate does not need to drive the positioning cylinder 83, the positioning arm 82 and the positioning pressing plate 8 to move, and the operating energy consumption of the moving motor 54 is not likely to increase. Therefore, the overall operating energy consumption of the equipment is effectively reduced, and the production cost of welding the battery tab to the battery top cover is decreased.

[0040] The above are all the preferred embodiments of the present application, and the protection scope of the present application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A battery tab and top cover welding device, comprising a base (1), characterized in that: A laser welding component (2) and a base (3) are arranged on the machine base (1); a lifting assembly (4) is arranged between the machine base (1) and the laser welding component (2); the lifting assembly (4) is used to move the laser welding component (2) along the height direction of the machine base (1); a moving assembly (5) is arranged between the machine base (1) and the base (3); the moving assembly (5) is used to move the base (3) along the length direction of the machine base (1); a workbench (6) is arranged on the base (3); a rotating assembly (7) is arranged between the workbench (6) and the base (3); the rotating assembly (7) is used to rotate the workbench (6) on the base (3).

2. A battery tab and top cover welding device according to claim 1, characterized in that: A positioning cylinder (83) is fixedly arranged on the machine base (1), a positioning arm (82) is fixedly arranged on the output shaft of the positioning cylinder (83), a positioning pressure plate (8) is fixedly arranged on one end of the positioning arm (82) away from the positioning cylinder (83), a laser through hole (81) is provided on the positioning pressure plate (8), and the laser through hole (81) is located below the laser welding part (2).

3. A battery tab and top cover welding device according to claim 1, characterized in that: The lifting assembly (4) comprises a lifting seat (41), a lifting arm (42), a lifting motor (43), a lifting screw (44) and a lifting slide (45); the lifting arm (42) is fixedly connected to the laser welding part (2); the lifting slide (45) passes through the lifting arm (42); the bottom end of the lifting slide (45) is fixedly connected to the machine seat (1); the top end of the lifting slide (45) is fixedly connected to the lifting seat (41); the lifting motor (43) is fixedly arranged on the top of the lifting seat (41); the output shaft of the lifting motor (43) passes through the lifting seat (41); the output shaft of the lifting motor (43) is fixedly connected to the top end of the lifting screw (44); the bottom end of the lifting screw (44) is rotatably connected to the machine seat (1); and the lifting screw (44) is threadedly connected to the lifting arm (42).

4. A battery tab and top cover welding device according to claim 1, characterized in that: The moving assembly (5) comprises a moving screw (51) and a moving seat (52); a moving groove (53) is provided on the machine base (1); the moving seat (52) is slidably arranged in the moving groove (53); the moving seat (52) is fixedly connected to the base (3); the moving screw (51) is rotatably arranged in the moving groove (53); and the moving screw (51) is threadedly connected to the moving seat (52).

5. A battery tab and top cover welding device according to claim 4, characterized in that: The moving assembly (5) further comprises a moving motor (54), wherein the moving motor (54) is fixedly arranged in the moving groove (53), wherein the output shaft of the moving motor (54) is fixedly connected to one end of the moving screw rod (51), and the other end of the moving screw rod (51) is rotatably connected to the inner wall of the moving groove (53).

6. A battery tab and top cover welding device according to claim 1, characterized in that: The rotating assembly (7) comprises a rotating motor (71), a mounting groove (711) is provided on the top of the base (3), the rotating motor (71) is fixedly arranged in the mounting groove (711), a mounting seat (9) is fixedly arranged on the output shaft of the rotating motor (71), a positioning protrusion (91) is fixedly arranged on the top of the mounting seat (9), and a positioning groove (911) is provided on the bottom of the workbench (6), and the positioning groove (911) is used for inserting the positioning protrusion (91).

7. A battery tab and top cover welding device according to claim 6, characterized in that: The rotating assembly (7) further comprises a plurality of balls (72). The top of the base (3) is provided with a plurality of support grooves (721). The balls (72) are rotatably arranged in the support grooves (721). The balls (72) abut against the bottom of the mounting seat (9).

8. A battery tab and top cover welding device according to claim 6, characterized in that: The mounting seat (9) is provided with a group of locking through holes (921), locking bolts (92) are inserted into the locking through holes (921), and the bottom of the workbench (6) is provided with a group of locking grooves (922), and the locking grooves (922) are used for threaded connection with the locking bolts (92).

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