Resistance welding machine for cylindrical lithium battery busbars

Abstract

A resistance welding machine for cylindrical lithium battery busbars relates to the technical field of welding machines, and in particular to the technical field of resistance welding machines for cylindrical lithium battery busbars. The present application includes an aluminum profile cover, a frame assembly, a welding head X, Y servo moving axis assembly, a module loading and unloading moving axis assembly, a busbar pressing tool assembly, a spot welding gun head assembly, a welding power source, and a video monitoring display. The aluminum profile cover is arranged on the frame assembly, and the welding head X, Y servo moving axis assembly is arranged on the aluminum profile cover. The module loading and unloading moving axis assembly and the busbar pressing tool assembly are arranged inside the aluminum profile cover located on the upper part of the frame assembly. The module loading and unloading moving axis assembly and the busbar pressing tool assembly are arranged on the aluminum profile cover on the upper part of the module loading and unloading moving axis assembly and the busbar pressing tool assembly. The spot welding gun head assembly and the welding power source are arranged on the aluminum profile cover, and a video monitoring display is arranged on the aluminum profile cover. The present application achieves the purpose of high production efficiency, guaranteed welding quality, and high product consistency.

Description

Technical Field

[0001] The present application relates to the technical field of electric welding machines, and in particular to the technical field of cylindrical lithium battery busbar resistance electric welding machines. Background Art

[0002] Cylindrical lithium batteries have the advantages of large capacity, long life, high safety performance, high voltage, no memory effect, low internal resistance, and strong flexibility in series and parallel connection, and are increasingly favored by power battery manufacturers. As automakers led by Tesla use cylindrical cells as the basic unit of power battery packs, this technology route has become more mature and stable, and the market demand for cylindrical cells is increasing. However, the existing cylindrical module assembly line is inefficient, and consistency and quality cannot be guaranteed. Summary of the invention

[0003] The present application provides a resistance welding machine for cylindrical lithium battery busbars with high production efficiency, guaranteed welding quality and high product consistency.

[0004] A resistance welding machine for cylindrical lithium battery busbars comprises an aluminum profile cover, a frame assembly, a welding head X, Y servo movable axis assembly, a module loading and unloading movable axis assembly, a busbar pressing tool assembly, a spot welding gun head assembly, a welding power source, and a video monitoring display. The aluminum profile cover is arranged on the frame assembly, the welding head X, Y servo movable axis assembly is arranged on the aluminum profile cover, the module loading and unloading movable axis assembly and the busbar pressing tool assembly are arranged inside the aluminum profile cover located on the upper part of the frame assembly, the spot welding gun head assembly and the welding power source are arranged on the aluminum profile cover above the module loading and unloading movable axis assembly and the busbar pressing tool assembly, and the video monitoring display is arranged on the aluminum profile cover.

[0005] Preferably, the aluminum profile cover of the present application includes an aluminum profile frame, a safety door, a button box assembly, a door suction assembly, a safety switch, a balance hanger, and a three-color light. Several safety doors are arranged on the side of the aluminum profile frame, and a door suction assembly and a safety switch are arranged between each safety door and the aluminum profile frame. A balance hanger is arranged on the upper part of the aluminum profile frame, and a button box assembly is arranged on the side wall of the aluminum profile frame.

[0006] Preferably, a three-color light for warning is provided on the top of the aluminum profile frame of the present application.

[0007] Better yet, the welding head X and Y servo movable axis assembly of the present application includes an X-axis linear module, a Y-axis movable module, a drag chain, and a mounting seat. The X-axis linear modules are two groups arranged in parallel, and a mounting seat is arranged at the bottom of each group of X-axis linear modules. The two ends of the Y-axis movable module are respectively connected to the X-axis linear module, and a drag chain is arranged on the Y-axis movable module.

[0008] Better yet, the module loading and unloading moving axis assembly of the present application includes a module, a first linear guide rail, a slide, and a rodless cylinder. The first linear cylinder is divided into two groups arranged in parallel. The module is arranged on the upper part of the first linear cylinder, and the module is connected to the rodless cylinder located between the two groups of first linear cylinders.

[0009] Preferably, the busbar clamping tooling assembly of the present application includes several groups of second linear guides, lifting cylinders, pressure plate connecting seats, linear guide mounting seats, and pressure plates, and there are at least two groups of pressure plates, a pressure plate connecting seat is arranged at the lower part of each group of pressure plates, several groups of evenly arranged second linear guides are arranged at the lower part of the pressure plate connecting seat, each second linear guide is connected to the linear guide mounting seat, and a lifting cylinder is arranged at the lower part of each group of pressure plate connecting seats.

[0010] Preferably, the spot welding gun head assembly of the present application includes a pressure following mechanism, a welding needle, an adapter block, a welding power cord, a slide cylinder, and a mounting plate. The slide cylinder is arranged on the side wall of the mounting plate. The piston rod of the slide cylinder cooperates with the pressure following mechanism and the welding needle. The welding needle is connected to the welding power cord, and the welding power cord is connected to the slide cylinder through the adapter block.

[0011] It is better that a camera is arranged on the frame for supporting the slide cylinder of the present application.

[0012] Preferably, a blow pipe matching with the welding needle is provided on the frame for supporting the slide cylinder of the present application.

[0013] This application adopts the above technical solution, which has the following advantages compared with the prior art:

[0014] 1. The electric welding machine of the present application adopts a servo control system and PLC control for the moving axes in the X and Y directions, which is programmable, and the compatibility and operability are greatly enhanced.

[0015] 2. This application ensures that welding will not produce cold welding and welding penetration from two aspects, ensuring the welding quality: first, the module and the busbar are pressed tightly with a pressing tool, and second, the resistance welding head adopts a pressure following mechanism. Only when the pressure of the welding needle reaches the preset value, the welding power supply discharges and welds. This solves the problem of cold welding caused by the loose fit between the busbar and the cylindrical battery cell in the existing resistance welding.

[0016] 3. The overall layout of this application adopts a double-station design, and loading and unloading can achieve non-stop production and improve production efficiency. It solves the problem that the existing manual spot welding machine adopts a single station, the machine is in a waiting time during loading and unloading, and the production efficiency is low.

[0017] 4. This application installs a camera at the spot welding gun head position to monitor and track the spot welding process, and uploads the real-time image to the industrial computer for storage and display, so that the operator can monitor the welding process outside the machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the general assembly of the electric welding machine of this application.

[0019] Figure 2 It is a structural schematic diagram of the aluminum profile cover of the present application.

[0020] Figure 3 It is a structural schematic diagram of the X and Y servo moving axis assembly of the welding head of this application.

[0021] Figure 4 It is a structural schematic diagram of the busbar pressing tooling assembly of the present application.

[0022] Figure 5 It is a structural schematic diagram of the assembly of the loading and unloading moving axis of the module of this application.

[0023] Figure 6 It is a structural schematic diagram of the spot welding gun head assembly of this application. DETAILED DESCRIPTION

[0024] The technical solution of the present application is described in detail below with reference to the accompanying drawings:

[0025] like Figure 1 As shown, a resistance welding machine for a cylindrical lithium battery busbar comprises an aluminum profile cover 1, a frame assembly 2, a welding head X, Y servo movable axis assembly 3, a module loading and unloading movable axis assembly 4, a busbar pressing tool assembly 5, a spot welding gun head assembly 6, a welding power source 7, and a video monitoring display 8. The aluminum profile cover 1 is arranged on the frame assembly 2, the welding head X, Y servo movable axis assembly 3 is arranged on the aluminum profile cover 1, the module loading and unloading movable axis assembly 4 and the busbar pressing tool assembly 5 are arranged inside the aluminum profile cover 1 located on the upper part of the frame assembly 2, the spot welding gun head assembly 6 and the welding power source 7 are arranged on the aluminum profile cover 1 above the module loading and unloading movable axis assembly 4 and the busbar pressing tool assembly 5, and the video monitoring display 8 is arranged on the aluminum profile cover 1.

[0026] like Figure 2 As shown, the aluminum profile cover 1 of the present application includes an aluminum profile frame 9, a safety door 10, a button box assembly 11, a door suction assembly 12, a safety switch 13, a balance hanger 14, and a three-color light 15. Several safety doors 10 are arranged on the side of the aluminum profile frame 9, and a door suction assembly 12 and a safety switch 13 are arranged between each safety door 10 and the aluminum profile frame 9. A balance hanger 14 is arranged on the upper part of the aluminum profile frame 9, and a button box assembly 11 is arranged on the side wall of the aluminum profile frame 9.

[0027] like Figure 2 As shown, a three-color light 15 for warning is arranged on the top of the aluminum profile frame 9 of the present application.

[0028] like Figure 3 As shown, the welding head X, Y servo movable axis assembly 3 of the present application includes an X-axis linear module 16, a Y-axis movable module 17, a drag chain 18, and a mounting seat 19. The X-axis linear module 16 is divided into two groups arranged in parallel, and a mounting seat 19 is arranged at the bottom of each group of X-axis linear modules 16. The two ends of the Y-axis movable module 17 are respectively connected to the X-axis linear module 16, and the Y-axis movable module 17 is provided with a drag chain 18.

[0029] like Figure 5 As shown, the module loading and unloading moving axis assembly 4 of the present application includes a module 25, a first linear guide rail 26, a slide 27, and a rodless cylinder 28. The first linear cylinder 26 is arranged in two groups in parallel. The module 25 is set on the upper part of the first linear cylinder 26, and the module 25 is connected to the rodless cylinder 28 located between the two groups of first linear cylinders 26.

[0030] like Figure 4 As shown, the busbar pressing tool assembly 5 of the present application includes several groups of second linear guide rails 20, lifting cylinders 21, pressure plate connection seats 22, linear guide rail mounting seats 23, and pressure plates 24. There are at least two groups of pressure plates 24. The lower part of each group of pressure plates 24 is provided with a pressure plate connection seat 22. The lower part of the pressure plate connection seat 22 is provided with several groups of evenly arranged second linear guide rails 20. Each second linear guide rail 20 is connected to the linear guide rail mounting seat 23. The lower part of each group of pressure plate connection seat 22 is provided with a lifting cylinder 21. The lifting cylinder 21 moves downward to drive the pressure plate connection seat 22 and the pressure plate 24 to press the busbar and the positive and negative electrodes of the battery.

[0031] like Figure 6 As shown, the spot welding gun head assembly 6 of the present application includes a pressure following mechanism 30, a welding needle 31, an adapter block 33, a welding power line 34, a slide cylinder 35, and a mounting plate 36. The slide cylinder 35 is arranged on the side wall of the mounting plate 36. The piston rod of the slide cylinder 35 cooperates with the pressure following mechanism 30 and the welding needle 31. The welding needle 31 is connected to the welding power line 34, and the welding power line 34 is connected to the slide cylinder 35 through the adapter block 33. The slide cylinder 35 descends to drive the pressure following mechanism 30 and the welding needle 31. The welding needle contacts the bus until the pressure reaches the pressure threshold set by the pressure following mechanism 30, and a signal is sent to the welding power supply 7 to discharge. The slide cylinder 35 rises and exits, and the X, Y servo moving axis 3 moves to the position of the next welding point to complete the welding action of one point.

[0032] like Figure 6 As shown, the present application is used to set a camera 29 on the frame supporting the slide cylinder 35. During the welding process, the camera 29 records the work process, and the video signal is projected onto the video monitoring display 8 via the industrial computer.

[0033] like Figure 6As shown, the present application is used to set a blow pipe 32 matched with the welding needle 31 on the frame supporting the slide cylinder 35. The gas blown out of the blow pipe 32 is always blown to the working area of ​​the welding needle 31 to play a cooling role.

[0034] When the present application is used, the module 25 is manually moved to the slide 27 to set the position, and the start button in the button box assembly 11 is manually pressed, and the rodless cylinder 28 moves to transport the module to the working position. The lifting cylinder 21 moves down to drive the pressure plate connection seat 22 and the pressure plate 24 to press the bus and the positive and negative electrodes of the battery; the X, Y servo moving axis assembly 3 moves with the spot welding gun head assembly 6 to the debugged working position, at this time, the air blow pipe 32 opens to blow air, the slide cylinder 35 descends to drive the pressure follower mechanism 30 and the welding needle 31, and the welding needle contacts the bus until the pressure reaches the pressure threshold set by the pressure follower mechanism 30, and sends a signal to the welding power supply 7 to discharge, the slide cylinder 35 rises and exits, and the X, Y servo moving axis 3 moves to the position of the next welding point, completing the welding action of one point. During the welding process, the work project is recorded by the camera 29, and the video signal is projected to the video monitoring display 8 via the industrial computer. The gas blown out of the air blow pipe 32 always blows to the working area of ​​the welding needle 31, which plays a cooling role. Repeat the above actions until all busbars are welded, the lifting cylinder 21 lifts the pressure plate 24 to separate from the busbars, the rodless cylinder 28 moves to transport the module to the loading and unloading position, and the welded module is manually moved off the production line.

Claims

1. A resistance welding machine for cylindrical lithium battery busbars, characterized in that The invention comprises an aluminum profile cover (1), a frame assembly (2), a welding head X and Y servo movable axis assembly (3), a module loading and unloading movable axis assembly (4), a busbar pressing tool assembly (5), a spot welding gun head assembly (6), a welding power source (7), and a video monitoring display (8); the aluminum profile cover (1) is arranged on the frame assembly (2); the welding head X and Y servo movable axis assembly (3) is arranged on the aluminum profile cover (1); the module loading and unloading movable axis assembly (4) and the busbar pressing tool assembly (5) are arranged inside the aluminum profile cover (1) located above the frame assembly (2); the spot welding gun head assembly (6) and the welding power source (7) are arranged on the aluminum profile cover (1) above the module loading and unloading movable axis assembly (4) and the busbar pressing tool assembly (5); and the video monitoring display (8) is arranged on the aluminum profile cover (1); The welding head X and Y servo movable axis assembly (3) comprises an X-axis linear module (16), a Y-axis movable module (17), a drag chain (18), and a mounting seat (19); the X-axis linear module (16) is composed of two groups arranged in parallel, a mounting seat (19) is arranged at the bottom of each group of X-axis linear modules (16), two ends of the Y-axis movable module (17) are respectively connected to the X-axis linear module (16), and a drag chain (18) is arranged on the Y-axis movable module (17); The module loading and unloading moving axis assembly (4) comprises a module (25), a first linear guide rail (26), a slide plate (27), and a rodless cylinder (28). The first linear cylinder (26) is divided into two groups arranged in parallel. The module (25) is arranged on the upper part of the first linear cylinder (26). The module (25) is connected to the rodless cylinder (28) located between the two groups of first linear cylinders (26). The busbar pressing tool assembly (5) comprises a plurality of groups of second linear guide rails (20), a lifting cylinder (21), a pressure plate connecting seat (22), a linear guide rail mounting seat (23), and a pressure plate (24). The pressure plates (24) include at least two groups, a pressure plate connecting seat (22) is provided at the bottom of each group of pressure plates (24), a plurality of groups of evenly arranged second linear guide rails (20) are provided at the bottom of the pressure plate connecting seat (22), each second linear guide rail (20) is connected to the linear guide rail mounting seat (23), and a lifting cylinder (21) is provided at the bottom of each group of pressure plate connecting seat (22); The spot welding gun head assembly (6) comprises a pressure following mechanism (30), a welding needle (31), an adapter block (33), a welding power line (34), a slide cylinder (35), and a mounting plate (36). The slide cylinder (35) is arranged on the side wall of the mounting plate (36). The piston rod of the slide cylinder (35) cooperates with the pressure following mechanism (30) and the welding needle (31). The welding needle (31) is connected to the welding power line (34), and the welding power line (34) is connected to the slide cylinder (35) through the adapter block (33).

2. The resistance welding machine for cylindrical lithium battery busbars according to claim 1, characterized in that The aluminum profile cover (1) comprises an aluminum profile frame (9), a safety door (10), a button box assembly (11), a door stopper assembly (12), a safety switch (13), a balance hanger (14), and a three-color lamp (15). A plurality of safety doors (10) are arranged on the side of the aluminum profile frame (9), a door stopper assembly (12) and a safety switch (13) are arranged between each safety door (10) and the aluminum profile frame (9), a balance hanger (14) is arranged on the upper part of the aluminum profile frame (9), and a button box assembly (11) is arranged on the side wall of the aluminum profile frame (9).

3. The resistance welding machine for cylindrical lithium battery busbars according to claim 2, characterized in that A three-color light (15) for warning is arranged on the top of the aluminum profile frame (9).

4. The resistance welding machine for cylindrical lithium battery busbars according to claim 1, characterized in that A camera (29) is arranged on the frame for supporting the slide cylinder (35).

5. The resistance welding machine for cylindrical lithium battery busbars according to claim 1, characterized in that The frame for supporting the slide cylinder (35) is provided with a blowing pipe (32) matched with the welding needle (31).

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