Ultrasonic welding tooling

Abstract

The application discloses an ultrasonic welding tool, which comprises a bottom plate, a pole welding seat, a pressing mechanism, two height adjusting devices and two angle adjusting devices, the bottom of the pole welding seat is connected to the bottom plate, the top of the pole welding seat is used for placing a pole, the two height adjusting devices are both connected to the bottom plate and can be adjusted in lifting, the two angle adjusting devices are respectively hinged to the top of the two height adjusting devices, the two angle adjusting devices are used for placing a positioning battery current collector between them, one end of the pressing mechanism is connected to the bottom plate, and the other end of the pressing mechanism is located between the two angle adjusting devices and is used for pressing against the pole and the battery current collector. The application can accurately align the pole and the battery current collector, realize high welding precision, effectively reduce BOM cost and process cost, effectively improve the space utilization rate of lithium batteries and improve the capacity.

Description

Technical Field

[0001] This invention relates to an ultrasonic welding fixture. Background Technology

[0002] The typical method for welding current collectors to cover plates and terminals in lithium-ion power and energy storage batteries involves ultrasonically welding the current collector to a connecting piece, and then laser welding the connecting piece to the terminal. Because the current collector and cover plate terminals need to be connected together via the connecting piece, this results in low utilization of the internal space of the cell, high manufacturing costs, increased battery weight, and high BOM costs. Summary of the Invention

[0003] The purpose of this invention is to overcome the above-mentioned shortcomings of existing technologies. This invention provides an ultrasonic welding fixture.

[0004] This invention is achieved through the following technical solution:

[0005] An ultrasonic welding fixture includes a base plate, an electrode welding seat, a clamping mechanism, two height adjustment devices, and two angle adjustment devices. The bottom of the electrode welding seat is connected to the base plate, and the top of the electrode welding seat is used to place the electrode. Both height adjustment devices are connected to the base plate and can be raised and lowered. The two angle adjustment devices are respectively hinged to the top of the two height adjustment devices. A positioning current collector for a battery cell is placed between the two angle adjustment devices. One end of the clamping mechanism is connected to the base plate, and the other end of the clamping mechanism is located between the two angle adjustment devices and is used to clamp and abut against the electrode and the current collector for welding the electrode and the current collector together.

[0006] Furthermore, the height adjustment device includes a mounting plate and a first telescopic component, the first telescopic component being capable of telescopic movement, and the bottom end and top end of the first telescopic component being connected to the base plate and the mounting plate, respectively.

[0007] Furthermore, the height adjustment device also includes a guide post and a guide sleeve. The guide post is vertically arranged and connected to the base plate, and the guide sleeve is connected to the bottom surface of the mounting plate. The guide sleeve is fitted onto the guide post and moves up and down on the guide post.

[0008] Furthermore, the first telescopic component includes a fixed screw and a movable nut. The fixed screw is vertically arranged and connected to the base plate, and the movable nut abuts against the bottom surface of the mounting plate. The movable nut is threadedly connected to the fixed screw and can move up and down on the fixed screw to drive the mounting plate to move up and down for adjustment.

[0009] Furthermore, the first telescopic component is a telescopic cylinder, a telescopic hydraulic cylinder, or a telescopic motor.

[0010] Furthermore, the angle adjustment device includes a swing plate and a second telescopic component. The swing plate is hinged to the mounting plate, and the second telescopic component is capable of telescopic movement. Both ends of the second telescopic component are respectively connected to the mounting plate and the swing plate.

[0011] Furthermore, the angle adjustment device also includes a guide plate connected to the mounting plate, the guide plate having an arc-shaped guide groove, and the swing plate connected to the arc-shaped guide groove and swinging within the arc-shaped guide groove.

[0012] Furthermore, the guide plate has scale markings corresponding to the arc-shaped guide groove.

[0013] Furthermore, the clamping mechanism includes a driving component and a clamping plate. The fixed end of the driving component is connected to the base plate, and the movable end of the driving component is connected to one end of the clamping plate and is used to drive the clamping plate to move up and down. The other end of the clamping plate presses against the electrode post and the current collector of the battery cell.

[0014] Furthermore, the driving component is a cylinder;

[0015] And / or, the clamping plate is a T-shaped plate.

[0016] The beneficial effects of this invention are as follows:

[0017] The ultrasonic welding fixture of this invention enables the adjustment of the height and angle of the current collector in the battery cell through a height adjustment device and an angle adjustment device, ensuring precise alignment between the electrode and the current collector. A clamping mechanism presses the electrode against the current collector, allowing them to be directly welded together. This achieves high welding precision, effectively reduces BOM and process costs, and significantly improves lithium battery space utilization and capacity. Attached Figure Description

[0018] Figure 1 This is a front view schematic diagram of the ultrasonic welding fixture according to an embodiment of the present invention.

[0019] Figure 2 This is a top view of the ultrasonic welding fixture according to an embodiment of the present invention.

[0020] Explanation of reference numerals in the attached figures:

[0021] Base plate 1

[0022] Height adjustment device 2

[0023] Mounting plate 21

[0024] First telescopic component 22

[0025] Fixed screw 221

[0026] Moving nut 222

[0027] Guide post 23

[0028] Guide sleeve 24

[0029] Angle adjustment device 3

[0030] Swing plate 31

[0031] Guide plate 32

[0032] Arc-shaped guide groove 321

[0033] Scale mark 322

[0034] 4 pole post welding seat

[0035] Clamping mechanism 5

[0036] Drive component 51

[0037] Clamping plate 52 Detailed Implementation

[0038] The following description of the embodiments is taken with reference to the accompanying drawings, which illustrate specific embodiments in which the invention can be implemented.

[0039] This embodiment discloses an ultrasonic welding fixture, which is applied to an ultrasonic assembly and ultrasonically welds the electrode post and the current collector of the battery cell together. The ultrasonic assembly includes an ultrasonic torque welder and a tool head, the tool head having a diameter of 4–20 mm and a length of 10–400 mm.

[0040] like Figure 1 and Figure 2 As shown, the ultrasonic welding fixture includes a base plate 1, an electrode welding seat 4, a clamping mechanism 5, two height adjustment devices 2, and two angle adjustment devices 3. The bottom of the electrode welding seat 4 is connected to the base plate 1, and the top of the electrode welding seat 4 is used to place the electrode. Both height adjustment devices 2 are connected to the base plate 1 and can be raised and lowered. The two angle adjustment devices 3 are respectively hinged to the top of the two height adjustment devices 2. The positioning current collector of the battery cell is placed between the two angle adjustment devices 3. One end of the clamping mechanism 5 is connected to the base plate 1, and the other end of the clamping mechanism 5 is located between the two angle adjustment devices 3 and is used to clamp and abut against the electrode and the current collector of the battery cell, so that the electrode and the current collector of the battery cell are welded together.

[0041] The electrode post is positioned on the electrode post welding seat 4; the current collector is placed between two angle adjustment devices 3, which are respectively hinged to the tops of two height adjustment devices 2. The angle of the current collector is adjusted by swinging the two angle adjustment devices 3; the height of the angle adjustment devices 3 and the current collector is adjusted by raising and lowering the height adjustment devices 2. The height and angle of the current collector can be adjusted by the height adjustment devices 2 and 3, ensuring precise alignment between the electrode post and the current collector. The clamping mechanism 5 presses the electrode post and the current collector together, and then the electrode post and the current collector are directly welded together, achieving high welding precision.

[0042] In this embodiment, ultrasonic welding fixtures enable direct connection of the cell current collector to the terminal block. Through ultrasonic torque welding, 30-180 layers of cell current collectors are welded to the terminal block in a single operation, effectively reducing BOM and process costs, improving lithium battery space utilization, and solving the problem of increasing capacity. The welded cell current collectors are 120-350mm long, 20-200mm wide, and 5-60mm thick. Angle adjustment is 0-180 degrees, and height adjustment is 0-20mm.

[0043] The height adjustment device 2 includes a mounting plate 21 and a first telescopic component 22. The first telescopic component 22 is capable of telescopic movement, and its bottom and top ends are respectively connected to the base plate 1 and the mounting plate 21. The telescopic movement of the first telescopic component 22 will adjust the height of the mounting plate 21, the angle adjustment device 3, and the current collector of the battery cell.

[0044] The height adjustment device 2 also includes a guide post 23 and a guide sleeve 24. The guide post 23 is vertically arranged and connected to the base plate 1, and the guide sleeve 24 is connected to the bottom surface of the mounting plate 21. The guide sleeve 24 is fitted onto the guide post 23 and moves up and down on the guide post 23. The guide post 23 and the guide sleeve 24 have a guiding function. The guide post 23 is vertically arranged on the base plate 1, and the guide sleeve 24 moves up and down on the guide post 23, so that the mounting plate 21, the angle adjustment device 3, and the current collector of the battery cell move in the vertical direction, effectively avoiding the phenomenon of offset and misalignment, greatly improving the stability of the height adjustment device 2 during the lifting process, and achieving high welding accuracy.

[0045] In this embodiment, there are four guide posts 23 and four guide sleeves 24, with the four guide sleeves 24 respectively connected to the four corners of the bottom surface of the mounting plate 21. There is one first telescopic component 22, which is disposed in the middle area of ​​the bottom surface of the mounting plate 21.

[0046] In this embodiment, the first telescopic component 22 includes a fixed screw 221 and a movable nut 222. The fixed screw 221 is vertically arranged and connected to the base plate 1. The movable nut 222 abuts against the bottom surface of the mounting plate 21 and is threadedly connected to the fixed screw 221, allowing it to move up and down on the fixed screw 221 to adjust the height of the mounting plate 21. By rotating the movable nut 222, it moves up and down on the fixed screw 221, causing the angle adjustment device 3 of the mounting plate 21 and the current collector of the battery cell to move vertically. Height adjustment is very convenient and highly accurate, achieving precise alignment between the current collector of the battery cell and the electrode post. Simultaneously, the height adjustment has high stability, effectively preventing misalignment; and the overall structure is simple.

[0047] Of course, in other embodiments, the first telescopic component 22 may also be a telescopic cylinder, a telescopic hydraulic cylinder, or a telescopic motor, thereby enabling the first telescopic component 22 to extend and retract.

[0048] The angle adjustment device 3 includes a swing plate 31 and a second telescopic component. The swing plate 31 is hinged to the mounting plate 21, and the second telescopic component is capable of telescopic movement. Both ends of the second telescopic component are connected to the mounting plate 21 and the swing plate 31, respectively. The telescopic movement of the second telescopic component causes the swing plate 31 to swing on the mounting plate 21, thereby adjusting the angle of the current collector in the battery cell. The specific structure of the second telescopic component can be the same as that of the first telescopic component 22, and will not be repeated here.

[0049] The angle adjustment device 3 also includes a guide plate 32, which is connected to the mounting plate 21. The guide plate 32 has an arc-shaped guide groove 321, and the swing plate 31 is connected to the arc-shaped guide groove 321 and swings within the arc-shaped guide groove 321. The arc-shaped guide groove 321 on the guide plate 32 has a guiding function. During the swinging process, the swing plate 31 swings within the arc-shaped guide groove 321, effectively preventing the swing plate 31 from deviating or misaligning during use, thus ensuring high stability.

[0050] The guide plate 32 has scale marks 322 corresponding to the arc-shaped guide groove 321. The swing angle of the swing plate 31 can be directly observed through the scale marks 322, which makes the angle adjustment accurate and realizes the precise alignment between the current collector of the battery cell and the terminal post.

[0051] The clamping mechanism 5 includes a driving component 51 and a clamping plate 52. The fixed end of the driving component 51 is connected to the base plate 1, and the movable end of the driving component 51 is connected to one end of the clamping plate 52 and is used to drive the clamping plate 52 to move up and down. The other end of the clamping plate 52 presses against the electrode post and the current collector of the battery cell. The driving component 51 provides driving force to drive the clamping plate 52 to move downward, so that the clamping plate 52 presses against the electrode post and the current collector of the battery cell, thereby achieving direct welding between the electrode post and the current collector of the battery cell. The driving component 51 drives the clamping plate 52 to move upward, so that the welded electrode post and the current collector of the battery cell can be removed. The overall structure is simple and very convenient to use.

[0052] In this embodiment, the driving component 51 is a cylinder. The clamping plate 52 is a T-shaped plate, which includes a transverse portion and a longitudinal portion connected to the middle region of the transverse portion. The driving component 51 is connected to the transverse portion, and the longitudinal portion extends between the two swing plates 31 and is used to press against the electrode post and the current collector of the battery cell.

[0053] The above description discloses only preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. Therefore, equivalent variations made in accordance with the claims of the present invention are still within the scope of the present invention.

Claims

1. An ultrasonic welding fixture, characterized in that, It includes a base plate, a pole welding seat, a clamping mechanism, two height adjustment devices, and two angle adjustment devices. The bottom of the pole welding seat is connected to the base plate, and the top of the pole welding seat is used to place the pole. Both height adjustment devices are connected to the base plate and can be raised and lowered. The two angle adjustment devices are respectively hinged to the top of the two height adjustment devices. A positioning current collector for the battery cell is placed between the two angle adjustment devices. One end of the clamping mechanism is connected to the base plate, and the other end of the clamping mechanism is located between the two angle adjustment devices and is used to clamp and abut against the pole and the current collector for welding the pole and the current collector together.

2. The ultrasonic welding fixture as described in claim 1, characterized in that, The height adjustment device includes a mounting plate and a first telescopic component. The first telescopic component is capable of telescopic movement, and its bottom end and top end are respectively connected to the base plate and the mounting plate.

3. The ultrasonic welding fixture as described in claim 2, characterized in that, The height adjustment device further includes a guide post and a guide sleeve. The guide post is vertically arranged and connected to the base plate, and the guide sleeve is connected to the bottom surface of the mounting plate. The guide sleeve is fitted onto the guide post and moves up and down on the guide post.

4. The ultrasonic welding fixture as described in claim 2, characterized in that, The first telescopic component includes a fixed screw and a movable nut. The fixed screw is vertically arranged and connected to the base plate. The movable nut abuts against the bottom surface of the mounting plate and is threadedly connected to the fixed screw, and can move up and down on the fixed screw to drive the mounting plate to move up and down for adjustment.

5. The ultrasonic welding fixture as described in claim 2, characterized in that, The first telescopic component is a telescopic cylinder, a telescopic hydraulic cylinder, or a telescopic motor.

6. The ultrasonic welding fixture as described in claim 2, characterized in that, The angle adjustment device includes a swing plate and a second telescopic component. The swing plate is hinged to the mounting plate, and the second telescopic component is capable of telescopic movement. Both ends of the second telescopic component are respectively connected to the mounting plate and the swing plate.

7. The ultrasonic welding fixture as described in claim 6, characterized in that, The angle adjustment device further includes a guide plate connected to the mounting plate, the guide plate having an arc-shaped guide groove, and the swing plate connected to the arc-shaped guide groove and swinging within the arc-shaped guide groove.

8. The ultrasonic welding fixture as described in claim 7, characterized in that, The guide plate has scale markings corresponding to the arc-shaped guide groove.

9. The ultrasonic welding fixture as described in claim 1, characterized in that, The clamping mechanism includes a driving component and a clamping plate. The fixed end of the driving component is connected to the base plate, and the movable end of the driving component is connected to one end of the clamping plate and is used to drive the clamping plate to move up and down. The other end of the clamping plate presses against the electrode post and the current collector of the battery cell.

10. The ultrasonic welding fixture as described in claim 9, characterized in that, The driving component is a cylinder; And / or, the clamping plate is a T-shaped plate.

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