A battery welding fixture

Abstract

This utility model relates to a battery welding fixture, comprising: a base; a turntable rotatably disposed within a rotating groove in the center of the base; a receiving groove for placing a battery being formed at the rotation center of the turntable; several connecting rods, the first end of each connecting rod being pivotally connected to a slider, the slider being slidably disposed within a dovetail groove in the top surface of the base, the second end of each connecting rod being pivotally connected to the turntable; the second end of each connecting rod having an outwardly protruding clamping portion, the clamping portion having an arc-shaped notch near the side edge of the receiving groove, the shape of the arc-shaped notch matching the outer edge of the battery; and a driving member, the driving member driving the turntable to rotate within the rotating groove, the rotation of the turntable causing the second ends of each connecting rod to synchronously move closer to or away from the receiving groove, thereby clamping or releasing the battery. This battery welding fixture enables automatic and precise centering of the battery within the receiving groove and applies a uniform and continuous radial clamping force in the circumferential direction.

Description

Technical Field

[0001] This utility model relates to the technical field of welding auxiliary devices for fixing or positioning workpieces, and in particular to a battery welding fixture. Background Technology

[0002] In automated production lines for cylindrical batteries (such as lithium-ion and nickel-metal hydride batteries), laser welding of the casing to the cover or electrode is a critical process affecting sealing reliability. To ensure weld quality and reduce leakage, the welding fixture must keep the battery axis highly coaxial with the laser focal axis and provide uniform and controllable radial clamping force during rotary welding.

[0003] Currently, the industry generally uses welding fixtures with clamping at both ends or top on one side. Although these can ensure welding accuracy to a certain extent, they still have the following shortcomings: the automatic centering function is missing, and the battery axis relies on manual or robotic arm preset accuracy; the clamping force is unevenly distributed along the circumference, and it is easy to loosen locally after welding thermal deformation; the multi-drive sequential action results in a long opening and closing cycle, which is difficult to match with high-speed production lines; the structure is complex and the maintenance cost is high, which is not conducive to modular replacement.

[0004] In summary, there is an urgent need for a battery welding fixture to overcome the above-mentioned defects and meet the requirements of modern battery manufacturing for high efficiency, high precision and high adaptability. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by providing a battery welding fixture.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A battery welding fixture, comprising: The base has a rotating groove in the middle and several dovetail grooves on the top surface of the base. A turntable is rotatably disposed within the rotating groove; a receiving groove for placing batteries is provided at the center of rotation of the turntable. A plurality of connecting rods, each connecting rod having a first end pivotally connected to a slider, the slider being slidably disposed in a corresponding dovetail groove, and each connecting rod having a second end pivotally connected to a turntable; the second end of each connecting rod has an outwardly protruding clamping portion, the clamping portion having an arc-shaped notch near the side edge of the receiving groove, the shape of the arc-shaped notch matching the outer edge of the battery; And a drive unit that drives the turntable to rotate within the rotating slot, the rotation of the turntable causing the second ends of each of the connecting rods to move synchronously closer to or further away from the receiving slot, in order to clamp or release the battery.

[0007] Preferably, the top of the base is fixedly provided with a plurality of protruding structures, and the plurality of protruding structures are arranged in a rotationally symmetrical manner on the horizontal cross section of the base; Each of the dovetail grooves is formed on the top surface of the corresponding protrusion.

[0008] Preferably, the protruding structure extends toward the rotation center of the turntable to form a pressure block, the pressure block being used to restrict the movement of the turntable in the height direction of the base.

[0009] Preferably, the connection between each of the connecting rods and the turntable is arranged in a rotationally symmetrical manner on the horizontal cross-section of the turntable.

[0010] Preferably, the bottom of the base has several hollow structures.

[0011] Preferably, the turntable includes: a base and a top plate fixedly disposed on top of the base; The top plate and the base plate are coaxially arranged, and the receiving groove extends through the top plate at least. A through groove is provided on the side wall of the top plate, which communicates with the receiving groove. The connection between the connecting rod and the turntable is located in the through groove.

[0012] Preferably, the chassis has several hollow structures.

[0013] Preferably, the driving component is a cylinder, and the driving component is connected to the turntable via a floating joint.

[0014] The present invention adopts the above technical solution and has the following technical effects compared with the prior art: This utility model's battery welding fixture converts the rotation of the turntable into the synchronous radial movement of the rotationally symmetrically arranged connecting rods, enabling the battery to be automatically and accurately centered within the receiving slot. The clamping part with an arc-shaped notch can apply a uniform and continuous radial clamping force in the circumferential direction, thereby providing a stable and reliable radial constraint for the laser welding process, effectively suppressing defects such as porosity and cracks induced by positioning errors, and significantly improving the quality and consistency of the weld. Attached Figure Description

[0015] Figure 1 This is a top view of the battery welding fixture in this utility model. Figure 2 This is an exploded structural diagram of the battery welding fixture in this utility model; The reference numerals in the figures include: Base 1; Rotating groove 11; Raised structure 12; Dovetail groove 121; Pressing block 122; Turntable 2; Receiving groove 21; Base plate 22; Top plate 23; Through groove 231; Connecting rod 3; Slider 31; Clamping part 32; Arc-shaped notch 321; Driving component 4; Floating joint 41; Battery 5; Welded part 51; Welded part 52. Detailed Implementation

[0016] The specific embodiments of this utility model will be described in detail below.

[0017] Unless otherwise defined, the technical or scientific terms used in the claims and description shall have the ordinary meaning as understood by one of ordinary skill in the art to which this utility model pertains.

[0018] The word "comprising" or similar terms used in this utility model patent application specification and claims mean that the objects preceding "comprising" include the objects listed after "comprising" or their equivalents, and do not exclude other objects.

[0019] Example 1

[0020] like Figure 2 As shown, this embodiment provides a battery welding fixture, including: Base 1; the bottom of the base 1 is provided with several hollow structures to reduce weight; a rotating groove 11 is provided in the middle of the base 1; several protruding structures 12 are fixedly provided on the top of the base 1, and the several protruding structures 12 are arranged in rotational symmetry on the horizontal cross section of the base 1. A dovetail groove 121 is provided on the top surface of each protruding structure 12. The extension direction of the dovetail groove 121 is set towards the center of the rotating groove 11. The protruding structure 12 also extends towards the center of the rotating groove 11 to form a pressure block 122. Turntable 2 is rotatably disposed in the rotating groove 11, and the movement of the turntable 2 in the height direction of the base 1 is restricted by the pressure block 122; The turntable 2 includes: a base plate 22 with several hollow structures, and a top plate 23 fixedly disposed on the top of the base plate 22; the top plate 23 is coaxially disposed with the base plate 22, and a receiving groove 21 for placing the battery 5 is provided at the rotation center of the top plate 23 (depending on the actual situation, the receiving groove 21 can also penetrate the base plate 22 and the base 1). Several through grooves 231 are provided on the side wall of the top plate 23, and the several through grooves 231 are arranged rotationally symmetrically on the horizontal cross section of the top plate 23, and each of the through grooves 231 is connected to the receiving groove 21; A plurality of connecting rods 3, each connecting rod 3 having a first end pivotally connected to a slider 31, the slider 31 being slidably disposed within a corresponding dovetail groove 121, and each connecting rod 3 having a second end pivotally connected to a corresponding through groove 231; the second end of each connecting rod 3 has an outwardly protruding clamping portion 32, the clamping portion 32 having an arc-shaped notch 321 near the side edge of the receiving groove 21, the shape of the arc-shaped notch 321 matching the outer edge of the battery 5; And a drive unit 4, which drives the turntable 2 to rotate within the rotating groove 11. The rotation of the turntable 2 can drive the second ends of each of the connecting rods 3 to move synchronously closer to or further away from the receiving groove 21 in order to clamp or release the battery 5.

[0021] In a preferred embodiment, the driving component 4 is a cylinder, which is connected to the chassis 22 via a floating joint 41; the cylinder can drive the turntable 2 to rotate clockwise or counterclockwise, thereby realizing the instantaneous opening and closing of the battery welding fixture to meet the cycle time requirements of the high-speed production line.

[0022] like Figure 1 As shown, this embodiment also provides a method for using the battery welding fixture as described above, the steps of which include: Transfer battery 5 into receiving slot 21; The driving component 4 drives the chassis 22 to rotate counterclockwise (as shown in the figure, the same below) in the rotating groove 11. The coaxially arranged top plate 23 drives the second end of each connecting rod 3 to rotate synchronously. The slider 31 slides inward along the dovetail groove 121, and the arc-shaped notch 321 of the clamping part 32 approaches the battery 5 until the clamping is completed. Welding component 52 to the welded component 51; The driving component 4 drives the chassis 22 to rotate clockwise in the rotating groove 11. The coaxially arranged top plate 23 drives the second end of each connecting rod 3 to rotate synchronously. The slider 31 slides outward along the dovetail groove 121, and the arc-shaped notch 321 of the clamping part 32 moves away from the battery 5 until the release is complete. Battery 5 is transferred from its container 21 to the subsequent processing section.

[0023] In summary, the battery welding fixture of this invention converts the rotation of the turntable into the synchronous radial movement of the rotationally symmetrically arranged connecting rods, enabling the battery to be automatically and accurately centered in the receiving groove; the clamping part with the arc-shaped notch can apply a uniform and continuous radial clamping force in the circumferential direction, thereby providing a stable and reliable radial constraint for the laser welding process, effectively suppressing defects such as porosity and cracks induced by positioning errors, and significantly improving the quality and consistency of the weld.

[0024] The above description is only a preferred embodiment of the present utility model and does not limit the implementation method and protection scope of the present utility model. Those skilled in the art should realize that all solutions obtained by equivalent substitutions and obvious changes made based on the description and illustrations of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A battery welding fixture, characterized in that, include: The base (1) has a rotating groove (11) in the middle and a number of dovetail grooves (121) on the top surface of the base (1). Turntable (2), which is rotatably disposed in the rotating groove (11); a receiving groove (21) for placing battery (5) is provided at the rotation center of the turntable (2). A plurality of connecting rods (3), the first end of each connecting rod (3) is pivotally connected to a slider (31), the slider (31) is slidably disposed in the corresponding dovetail groove (121), the second end of each connecting rod (3) is pivotally connected to the turntable (2); the second end of the connecting rod (3) has an outwardly protruding clamping part (32), the clamping part (32) is provided with an arc-shaped notch (321) near the side edge of the receiving groove (21), the shape of the arc-shaped notch (321) matches the outer edge of the battery (5); And a drive (4) that drives the turntable (2) to rotate in the rotating groove (11), the rotation of the turntable (2) causing the second ends of each of the connecting rods (3) to move synchronously closer to or further away from the receiving groove (21) to clamp or release the battery (5).

2. The battery welding fixture according to claim 1, characterized in that, The top of the base (1) is fixedly provided with a plurality of protruding structures (12), and the plurality of protruding structures (12) are arranged in a rotationally symmetrical manner on the horizontal cross section of the base (1). Each of the dovetail grooves (121) is formed on the top surface of the corresponding protrusion (12).

3. The battery welding fixture according to claim 2, characterized in that, The protruding structure (12) extends toward the rotation center of the turntable (2) to form a pressure block (122), which is used to restrict the movement of the turntable (2) in the height direction of the base (1).

4. The battery welding fixture according to claim 2, characterized in that, The connection between each of the connecting rods (3) and the turntable (2) is arranged in a rotationally symmetrical manner on the horizontal cross section of the turntable (2).

5. The battery welding fixture according to claim 1, characterized in that, The bottom of the base (1) is provided with several hollow structures.

6. The battery welding fixture according to claim 1, characterized in that, The turntable (2) includes: a base (22) and a top plate (23) fixedly disposed on the top of the base (22). The top plate (23) is coaxially arranged with the bottom plate (22), and the receiving groove (21) passes through the top plate (23) at least. A through groove (231) is provided on the side wall of the top plate (23), the through groove (231) is connected to the receiving groove (21), and the connection between the connecting rod (3) and the turntable (2) is located in the through groove (231).

7. The battery welding fixture according to claim 6, characterized in that, The chassis (22) has several hollow structures.

8. The battery welding fixture according to claim 1, characterized in that, The driving component (4) is a cylinder, and the driving component (4) is connected to the turntable (2) through a floating joint (41).

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