Lithium battery cap welding device

Abstract

A lithium battery cap welding device comprises a cap pushing mechanism, a battery jacking mechanism, a pressing mechanism, a driving piece, at least one driving wheel, a first transmission assembly, a second transmission assembly and a third transmission assembly, and the at least one driving wheel is provided with a first track part, a second track part and a third track part; the first transmission assembly, the second transmission assembly and the third transmission assembly are connected to the first track part, the second track part and the third track part correspondingly, and the driving piece can drive the driving wheel to rotate so that the first track part, the second track part and the third track part can rotate synchronously. The first track part drives the battery jacking mechanism to periodically ascend and descend through the first transmission assembly, and the second track part drives the cap pushing mechanism to periodically push caps through the second transmission assembly. And the third track part drives the pressing mechanism to periodically press and loosen through the third transmission assembly. According to the scheme, the welding efficiency of the tabs and the caps is improved, and the stability of the welding device is improved.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery technology, and in particular to a lithium battery cap welding device. Background Technology

[0002] Lithium-ion batteries are widely used in electronic devices across various sectors of daily life due to their high energy density and long lifespan. After the cylindrical lithium-ion battery core is installed in the casing, the tabs and caps need to be welded together, typically using automated welding equipment. Before welding begins, the tabs and caps need to be pressed together, usually achieved through actions such as tab positioning, cap pushing, and clamping the tabs and caps together. In current technology, these actions are generally controlled individually by independent mechanical mechanisms; however, it is difficult to achieve coordinated control of these actions through electronic control programs. Therefore, the welding efficiency of the tabs and caps is low, and the stability of the welding equipment is poor. Utility Model Content

[0003] To address the aforementioned problems, the purpose of this utility model is to provide a lithium battery cap welding device that improves the welding efficiency of the tabs and caps and enhances the stability of the welding device.

[0004] The objective of this utility model is achieved through the following technical solution:

[0005] A lithium battery cap welding device includes a cap pushing mechanism, a battery lifting mechanism, a clamping mechanism, a driving component, at least one driving wheel, a first transmission assembly, a second transmission assembly, and a third transmission assembly. The at least one driving wheel has a first track portion, a second track portion, and a third track portion. The first transmission assembly, the second transmission assembly, and the third transmission assembly are respectively connected to the first track portion, the second track portion, and the third track portion. The driving component can drive the driving wheel to rotate, so that the first track portion, the second track portion, and the third track portion rotate synchronously. The first track portion drives the battery lifting mechanism to periodically rise and fall via the first transmission assembly. The second track portion drives the cap pushing mechanism to periodically push the cap via the second transmission assembly. The third track portion drives the clamping mechanism to periodically clamp and loosen via the third transmission assembly.

[0006] This solution designs the trajectory paths and operational sequences of the first, second, and third track sections of the drive wheel, enabling them to control the welding device via the first, second, and third transmission components to perform actions such as tab positioning, cap pushing, and tab-cap mating and clamping. The first track section, through the first transmission component, drives the battery lifting mechanism to lift the battery, bringing the tab to the clamping position. During this process, the second track section, through the second transmission component, drives the cap pushing mechanism to push the cap, ensuring the cap engages with the tab when it reaches the clamping position. Simultaneously, the third track section, through the third transmission component, drives the clamping mechanism to move, working in conjunction with the cap pushing mechanism to press and clamp the cap and tab together. The seamless integration of these actions, utilizing parallel operations to save time and reduce processing time, improves welding efficiency. Furthermore, the use of mechanical structures instead of electronic control programs for coordinated control of these actions results in superior overall stability.

[0007] Furthermore, the first transmission assembly includes a first swing arm and a first transmission rod unit. The first swing arm is connected to the first transmission rod unit. The first swing arm is provided with a first pulley. The first pulley is connected to the first track section. When the drive wheel rotates, the first pulley rolls along the first track section, and the first swing arm swings with the first pulley to drive the first transmission rod unit to move periodically.

[0008] One end of the first swing arm is fixed by a pin, and the first pulley is connected to the first track section. When the drive wheel rotates, the first pulley rolls along the track path of the first track section, thereby causing the first swing arm to swing periodically around the pin. The first swing arm is movably connected to the first transmission rod unit through a connector, and the swing arm drives the first transmission rod unit to perform periodic motion during the swinging process.

[0009] Furthermore, the first transmission rod unit is connected to the battery lifting mechanism, and the first transmission rod unit can drive the battery lifting mechanism to lift the battery so that the battery tabs are close to the clamping mechanism.

[0010] The first transmission rod unit is connected to the battery lifting mechanism. Driven by the first transmission rod unit, when the battery reaches the lifting position, the battery lifting mechanism lifts the battery so that the tabs reach the clamping position, and then the battery lifting mechanism lowers.

[0011] Furthermore, the second transmission assembly includes a second transmission rod unit, a second transmission shaft, a drive connecting arm, and a transmission connecting arm. The drive connecting arm and the transmission connecting arm are sleeved on the second transmission shaft. The second transmission rod unit is connected to the transmission connecting arm. The drive connecting arm is provided with a second pulley, which is connected to the second track section. When the drive wheel rotates, the second pulley rolls along the second track section, and the transmission connecting arm swings with the second pulley to drive the second transmission rod unit to move periodically.

[0012] The drive connecting arm is sleeved on the second drive shaft. The second pulley on the drive connecting arm is connected to the second track section. When the drive wheel rotates, the second pulley rolls along the track path of the second track section, thereby driving the second drive shaft to reciprocate. The transmission connecting arm is sleeved on the second drive shaft, so the transmission connecting arm swings periodically around the second drive shaft. The second transmission rod unit is movably connected to the transmission connecting arm through a connector. Under the action of the periodic swing of the transmission connecting arm, the second transmission rod unit performs periodic motion.

[0013] Furthermore, the cap pushing mechanism includes a first pushing unit, which includes a push rod, a push rod drive arm, and an elastic component. The elastic component is connected to the push rod drive arm, and the push rod drive arm is connected to the push rod. The push rod can push the cap along a first direction.

[0014] The cap is transported to the push position in the direction of the push rod by the feeding mechanism. Under the elastic force of the elastic component, the push rod moves in the first direction, pushing the cap in the push position to the position opposite to the electrode tab.

[0015] Furthermore, the cap pushing mechanism also includes a second pushing unit, the second transmission rod unit is connected to the second pushing unit, and the second transmission rod unit can drive the second pushing unit to push the cap along the second direction.

[0016] When the cap is pushed to the position opposite to the electrode tab by the first pushing unit, the second pushing unit moves along the second direction under the drive of the second transmission rod unit to abut against the cap, and then continues to push the cap to the clamping position to cooperate with the electrode tab.

[0017] Furthermore, the second pushing unit is provided with a top pushing block, and the push rod drive arm is located on the moving path of the top pushing block.

[0018] When the second pushing unit moves forward in the second direction, the top pushing block abuts against the push rod drive arm, causing the push rod drive arm to rotate along its axis, so that the push rod retracts in the first direction to the cap pushing position. During the rotation, the push rod drive arm stretches the elastic component. When the second pushing unit retracts in the second direction, the top pushing block and the push rod drive arm gradually separate. Under the elastic force of the elastic component, the push rod pushes the cap of the cap pushing position to the position opposite to the electrode tab.

[0019] Furthermore, the third transmission assembly includes a third drive arm and a third transmission rod unit. The third drive arm is connected to the third transmission rod unit. The third drive arm is provided with a third pulley, which is connected to the third track section. When the drive wheel rotates, the third pulley rolls along the third track section, and the third drive arm swings with the third pulley to drive the third transmission rod unit to move periodically.

[0020] One end of the third drive arm is connected to the third track section via the third pulley, and the other end is movably connected to the third transmission rod unit. When the drive wheel rotates, the third pulley rolls along the track path of the third track section, thereby driving the third transmission rod unit to move periodically through the third drive arm.

[0021] Furthermore, the third transmission rod unit is connected to the clamping mechanism, which is provided with a clamping member with a through hole. The third transmission rod unit can drive the clamping member to move closer to or away from the battery tab in the second direction.

[0022] The third transmission rod unit can drive the clamping mechanism to move along the second direction. The end of the clamping mechanism is provided with a clamping member. After the cap and the electrode ear reach the clamping position and cooperate, the clamping member moves along the second direction to approach the electrode ear and cooperates with the cap pushing mechanism to clamp the electrode ear and the cap.

[0023] Furthermore, it also includes a laser, which is located on one side of the clamping member and is disposed opposite to the through hole.

[0024] The laser is located on one side of the clamping part. After the electrode and the cap are clamped together, the laser emits a laser beam that passes through the through hole and irradiates the electrode, completing the welding of the electrode and the cap.

[0025] Compared with the prior art, the beneficial effects of this utility model are:

[0026] This solution designs the trajectory paths and operational sequences of the first, second, and third track sections of the drive wheel, enabling them to control the welding device via the first, second, and third transmission components to perform actions such as tab positioning, cap pushing, and tab-cap mating and clamping. The first track section, through the first transmission component, drives the battery lifting mechanism to lift the battery, bringing the tab to the clamping position. During this process, the second track section, through the second transmission component, drives the cap pushing mechanism to push the cap, ensuring the cap engages with the tab when it reaches the clamping position. Simultaneously, the third track section, through the third transmission component, drives the clamping mechanism to move, working in conjunction with the cap pushing mechanism to press and clamp the cap and tab together. The seamless integration of these actions, utilizing parallel operations to save time and reduce processing time, improves efficiency. Furthermore, the use of mechanical structures instead of electronic control programs for coordinated control of these actions results in superior overall stability. Attached Figure Description

[0027] Figure 1 This is a structural diagram of a lithium battery cap welding device according to an embodiment of the present invention.

[0028] Figure 2 for Figure 1 The main view.

[0029] Figure 3 for Figure 1 Left isometric projection.

[0030] Figure 4 This is a connection diagram of the drive wheel with the first transmission assembly and the third transmission assembly according to an embodiment of the present invention.

[0031] Figure 5 for Figure 4 The main view.

[0032] Figure 6 This is a connection diagram of the drive wheel and the second transmission assembly according to an embodiment of the present invention.

[0033] Figure 7 for Figure 1 A magnified view of part A in the image.

[0034] Figure 8 for Figure 2 A magnified view of part B in the image.

[0035] Illustration: 1-Cap pushing mechanism, 2-Battery lifting mechanism, 3-Clamping mechanism, 4-Drive wheel, 5-First transmission assembly, 6-Second transmission assembly, 7-Third transmission assembly, 11-First pushing unit, 12-Second pushing unit, 31-Clamping component, 41-First drive wheel, 42-Second drive wheel, 51-First swing arm, 52-First transmission rod unit, 61-Second transmission rod unit, 62-Second transmission shaft, 63-Drive connecting arm, 64-Transmission connecting arm, 71-Third drive arm, 72-Third transmission rod unit, 111-Push rod, 112-Push rod drive arm, 113-Elastic component, 121-Push stop block, 411-First track section, 421-Second track section, 412-Third track section, 511-First pulley, 631-Second pulley, 711-Third pulley. Detailed Implementation

[0036] To facilitate understanding of this invention, a more comprehensive description will be provided below with reference to the accompanying drawings. The drawings illustrate preferred embodiments of the invention. However, this invention can be implemented in many different forms and is not limited to the embodiments described herein.

[0037] like Figures 1 to 8 As shown in a preferred embodiment, a lithium battery cap welding device includes a cap pushing mechanism 1, a battery lifting mechanism 2, a pressing mechanism 3, a driving component (not shown in the figure), at least one driving wheel 4, a first transmission assembly 5, a second transmission assembly 6, and a third transmission assembly 7. In this embodiment, the driving component can adopt existing technology, such as a drive motor. Two sets of driving wheels 4 are provided, namely a first driving wheel 41 and a second driving wheel 42. The first driving wheel 41 is cam-shaped, and has a first track portion 411 and a third track portion 412. The first track portion 411 is the contour surface of the outer periphery of the cam, and the third track portion 412 is a track groove opened on the side of the cam. The second driving wheel 42 is a circular wheel, and has a second track portion 421, which is a track groove opened on the side of the circular wheel. The first transmission assembly 5, the second transmission assembly 6, and the third transmission assembly 7 are respectively connected to the first track section 411, the second track section 421, and the third track section 412. The driving member can drive the drive wheel 4 to rotate so that the first track section 411, the second track section 421, and the third track section 412 rotate synchronously. The first track section 411 drives the battery lifting mechanism 2 to periodically rise and fall through the first transmission assembly 5. The second track section 421 drives the cap pushing mechanism 1 to periodically push the cap through the second transmission assembly 6. The third track section 412 drives the pressing mechanism 3 to periodically press and release through the third transmission assembly 7.

[0038] This solution designs the trajectory paths and operating sequences of the first track section 411 and the third track section 412 of the first drive wheel 41, and the second track section 421 of the second drive wheel 42. These designs, through the first transmission assembly 5, the second transmission assembly 6, and the third transmission assembly 7, respectively control the welding device to perform actions such as tab positioning, cap pushing, and tab-cap mating and clamping. The first track section 411 drives the battery lifting mechanism 2 to lift the battery via the first transmission assembly 5, bringing the tab to the clamping position. During this process, the second track section 421 drives the cap pushing mechanism 1 via the second transmission assembly 6 to push the cap, and when the tab reaches the clamping position, the cap is mated with the tab. Simultaneously, the third track section 412 drives the clamping mechanism 3 via the third transmission assembly 7, which works in conjunction with the cap pushing mechanism 1 to press and clamp the cap and tab together. The various actions are closely linked, fully utilizing parallel actions to save unnecessary waiting time, thereby shortening processing time and improving efficiency. Meanwhile, by replacing the control program with a mechanical structure to achieve coordinated control of various actions, the overall stability is better.

[0039] like Figure 1 , Figure 4 and Figure 5 As shown, the first transmission assembly 5 includes a first swing arm 51 and a first transmission rod unit 52. The first swing arm 51 is equipped with a first pulley 511. One end of the first swing arm 51 is fixed by a pin and elastically connected to the fixing mechanism by an elastic component, such as a spring. The first pulley 511 is connected to the first track section 411. When the first drive wheel 41 rotates, the first pulley 511 rolls along the track path of the first track section 411, thereby driving the first swing arm 51 to swing periodically around the pin. The first swing arm 51 is movably connected to the first transmission rod unit 52 through a connector. During the swinging process, the first swing arm 51 drives the first transmission rod unit 52 to perform periodic movements. The first transmission rod unit 52 is connected to the battery lifting mechanism 2. Driven by the first transmission rod unit 52, when the battery reaches the lifting position, the battery lifting mechanism 2 lifts the battery so that the tabs reach the clamping position, and then the battery lifting mechanism 2 lowers.

[0040] like Figure 3 and 6As shown, the second transmission assembly 6 includes a second transmission rod unit 61, a second transmission shaft 62, a drive connecting arm 63, and a transmission connecting arm 64. The drive connecting arm 63 is sleeved on the second transmission shaft 62 and is provided with a second pulley 631. The second pulley 631 is connected to the second track section 421. When the second drive wheel 42 rotates, the second pulley 631 rolls along the track path of the second track section 421, thereby driving the second transmission shaft 62 to reciprocate. The transmission connecting arm 64 is sleeved on the second transmission shaft 62, so the transmission connecting arm 64 oscillates periodically around the second transmission shaft 62. The second transmission rod unit 61 is movably connected to the transmission connecting arm 64 through a connector. Under the action of the periodic oscillation of the transmission connecting arm 64, the second transmission rod unit 61 performs periodic motion.

[0041] like Figure 1 , Figure 3 and Figure 7 As shown, the cap pushing mechanism 1 includes a first pushing unit 11 and a second pushing unit 12, with a second transmission rod unit 61 connected to the second pushing unit 12. The first pushing unit 11 includes a push rod 111, a push rod drive arm 112, and an elastic component 113. The elastic component 113 can be a spring. The elastic component 113 is connected to the push rod drive arm 112, and the push rod drive arm 112 is connected to the push rod 111. The second pushing unit 12 is provided with a top-pushing stop 121, and the push rod drive arm 112 is positioned on the movement path of the top-pushing stop 121. When the second pushing unit 12 moves forward in the second direction, the top-pushing stop 121 abuts against the push rod drive arm 112, causing the push rod drive arm 112 to rotate along its axis, causing the push rod 111 to retract in the first direction to the cap pushing position. The cap is then transported to the pushing position in the direction of the push rod's movement via a feeding mechanism. During rotation, the push rod drive arm 112 stretches the elastic component 113. When the second pushing unit 12 retracts along the second direction, the push stop 121 gradually separates from the push rod drive arm 112. Under the elastic force of the elastic component 113, the push rod 111 moves along the first direction, pushing the cap of the pushing position to the position opposite to the electrode tab. When the cap is pushed to the position opposite to the electrode tab by the push rod 111, the second pushing unit 12 moves along the second direction under the drive of the second transmission rod unit 61 to abut against the cap, and then continues to push the cap to the clamping position to cooperate with the electrode tab.

[0042] like Figure 1 , Figure 3 , Figure 4 and Figure 5As shown, the third transmission assembly 7 includes a third drive arm 71 and a third transmission rod unit 72. The third drive arm 71 is connected to the third transmission rod unit 72. The third drive arm 71 is provided with a third pulley 711, which is connected to the third track section 412. When the first drive wheel 41 rotates, the third pulley 711 rolls along the third track section 412, and the third drive arm 71 swings with the third pulley 711 to drive the third transmission rod unit 72 to move periodically.

[0043] like Figure 1 , Figure 2 and Figure 8 The third transmission rod unit 72 shown is connected to the clamping mechanism 3. The clamping mechanism 3 has a clamping member 31 with a through hole at its end. The third transmission rod unit 72 can drive the clamping mechanism 3 to move along the second direction. After the cap and the electrode lug reach the clamping position and cooperate, the clamping member 31 moves along the second direction closer to the electrode lug, cooperating with the cap pushing mechanism 1 to clamp the electrode lug and the cap. A laser (not shown in the figure) is provided on one side of the clamping member 31. The laser can use existing technology. When the electrode lug and the cap are clamped, the laser emits a laser beam, which passes through the through hole and irradiates the electrode lug, completing the welding of the electrode lug and the cap.

[0044] In this embodiment, two sets of battery caps and electrode tabs can be welded at a time. Therefore, the cap pushing mechanism 1 includes two sets of first pushing units 11 and second pushing units 12. The second transmission rod unit 61 connected to the second pushing unit 12 is also provided in two sets.

[0045] In the description of this utility model, it should be understood that terms such as "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0046] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, the inclusion of "first," "second," etc., in a feature may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0047] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A lithium battery cap welding device, characterized in that, The device includes a cap pushing mechanism, a battery lifting mechanism, a pressing mechanism, a driving component, at least one driving wheel, a first transmission assembly, a second transmission assembly, and a third transmission assembly. At least one of the driving wheels has a first track portion, a second track portion, and a third track portion. The first transmission assembly, the second transmission assembly, and the third transmission assembly are respectively connected to the first track portion, the second track portion, and the third track portion. The driving component can drive the driving wheel to rotate so that the first track portion, the second track portion, and the third track portion rotate synchronously. The first track portion drives the battery lifting mechanism to periodically rise and fall through the first transmission assembly. The second track portion drives the cap pushing mechanism to periodically push the cap through the second transmission assembly. The third track portion drives the pressing mechanism to periodically press and release through the third transmission assembly.

2. The lithium battery cap welding device according to claim 1, characterized in that, The first transmission assembly includes a first swing arm and a first transmission rod unit. The first swing arm is connected to the first transmission rod unit. The first swing arm is provided with a first pulley. The first pulley is connected to the first track section. When the drive wheel rotates, the first pulley rolls along the first track section, and the first swing arm swings with the first pulley to drive the first transmission rod unit to move periodically.

3. The lithium battery cap welding device according to claim 2, characterized in that, The first transmission rod unit is connected to the battery lifting mechanism. The first transmission rod unit can drive the battery lifting mechanism to lift the battery so that the battery tabs are close to the clamping mechanism.

4. The lithium battery cap welding device according to claim 1, characterized in that, The second transmission assembly includes a second transmission rod unit, a second transmission shaft, a drive connecting arm, and a transmission connecting arm. The drive connecting arm and the transmission connecting arm are sleeved on the second transmission shaft. The second transmission rod unit is connected to the transmission connecting arm. The drive connecting arm is provided with a second pulley, which is connected to the second track section. When the drive wheel rotates, the second pulley rolls along the second track section, and the transmission connecting arm swings with the second pulley to drive the second transmission rod unit to move periodically.

5. The lithium battery cap welding device according to claim 4, characterized in that, The cap pushing mechanism includes a first pushing unit, which includes a push rod, a push rod drive arm, and an elastic component. The elastic component is connected to the push rod drive arm, and the push rod drive arm is connected to the push rod. The push rod can push the cap along a first direction.

6. The lithium battery cap welding device according to claim 5, characterized in that, The cap pushing mechanism further includes a second pushing unit, and the second transmission rod unit is connected to the second pushing unit. The second transmission rod unit can drive the second pushing unit to push the cap along a second direction.

7. The lithium battery cap welding device according to claim 6, characterized in that, The second pushing unit is provided with a push stop block, and the push rod drive arm is located on the moving path of the push stop block.

8. The lithium battery cap welding device according to claim 1, characterized in that, The third transmission assembly includes a third drive arm and a third transmission rod unit. The third drive arm is connected to the third transmission rod unit. The third drive arm is provided with a third pulley, which is connected to the third track section. When the drive wheel rotates, the third pulley rolls along the third track section, and the third drive arm swings with the third pulley to drive the third transmission rod unit to move periodically.

9. The lithium battery cap welding device according to claim 8, characterized in that, The third transmission rod unit is connected to the clamping mechanism, which is provided with a clamping member with a through hole. The third transmission rod unit can drive the clamping member to move closer to or away from the battery tab in the second direction.

10. The lithium battery cap welding device according to claim 9, characterized in that, It also includes a laser, which is located on one side of the clamping member and is positioned opposite to the through hole.

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