An ultrasonic welding tool

Abstract

The utility model relates to soft -packed battery processing technical field discloses an ultrasonic welding frock, including installation structure, parallel sliding rail, sliding structure, bottom plate, connecting piece, limit frame and stopper, wherein, parallel sliding rail set up on installation structure, sliding structure with parallel sliding rail sliding connection, and can reciprocatingly move opposite parallel sliding rail, the limit frame is provided on bottom plate, and the waist type hole is provided on bottom plate, connecting piece is used for connecting bottom plate with sliding structure to with the reciprocating movement of sliding structure moves bottom plate, the limit frame is used for placing the electric core of stacking on, stopper activity sets up on bottom plate, and stopper with limit frame joint, stopper can change its position on bottom plate, through the cooperation of sliding structure and parallel sliding rail, make stacking electric core can reciprocatingly move, realize the welding to positive and negative pole lug on a frock.

Description

Technical Field

[0001] This utility model relates to the field of soft-pack battery processing technology, and in particular to an ultrasonic welding fixture. Background Technology

[0002] Pouch cells, with their lightweight, thin, and flexible characteristics, have gained favor among many power battery manufacturers. The capacity and voltage of a single pouch cell are relatively small and insufficient to meet demand; therefore, multiple pouch cells are typically stacked to form a pouch battery to increase its capacity and voltage. The power output of a pouch cell relies on positive and negative tabs. The stacked cells are connected in parallel to increase capacity; that is, the positive tabs of multiple pouch cells are connected to each other, and the negative tabs are connected to each other to increase the total battery capacity. Typically, ultrasonic welding is used to tightly fuse multiple positive tabs and multiple negative tabs together to form a conductive path.

[0003] The existing Chinese utility model patent with publication number CN220943656U discloses a positioning mechanism for an ultrasonic welding device for soft-pack batteries. The mechanism facilitates the positioning of the battery cells by setting longitudinal and transverse baffles on the battery cell placement platform, and the height of the battery cell placement platform can be adjusted by the cooperation of guide column II and adjusting screw.

[0004] In the above technical solution, the positions of the longitudinal baffle, the transverse baffle, and the electrode guide block are relatively fixed, and positioning welding can only be performed on electrodes of different sizes in a single direction. When it is necessary to weld the negative electrode on the other side, the battery cell needs to be manually flipped to adjust the electrode orientation. This process not only destroys the initial positioning accuracy of the battery cell, causing the relative position of the electrode and the external electrode to shift, but may also damage the battery cell due to the flipping action. At the same time, it increases the operation steps and reduces the welding efficiency. Utility Model Content

[0005] To overcome at least one of the defects described in the prior art, this invention provides an ultrasonic welding fixture. Through the cooperation of a sliding structure and a parallel slide rail, stacked battery cells can reciprocate, enabling the welding of positive and negative electrodes on a single fixture.

[0006] The technical solution of this utility model is implemented as follows: An ultrasonic welding fixture includes an installation structure, a parallel slide rail, a sliding structure, a base plate, a connector, a limiting frame, and a stop block. The parallel slide rail is disposed on the installation structure; the sliding structure is slidably connected to the parallel slide rail and can reciprocate relative to the parallel slide rail; a limiting frame is provided on the base plate, and the base plate has an oblong hole; the connector is used to connect the base plate and the sliding structure, so that the base plate moves with the reciprocating movement of the sliding structure; stacked battery cells are placed on the limiting frame; the stop block is movably disposed on the base plate and engages with the limiting frame, and the stop block can change its position on the base plate to drive the limiting frame to change position.

[0007] Based on the above technical solutions, preferably, the stop has a first limiting part, which is engaged with the outer side of the limiting frame.

[0008] Based on the above technical solutions, preferably, a slot is provided on the side of the base plate away from the stop block for pushing the outer side of the limiting frame to move towards the first limiting part.

[0009] Based on the above technical solutions, preferably, the limiting frame extends in a direction away from the base plate to provide a limiting plate, and the stop block is provided with a second limiting part, which is engaged with the outer side of the limiting plate.

[0010] Based on the above technical solutions, preferably, the stop block is provided with a waist-shaped hole, the base plate is provided with a first mounting hole, and the waist-shaped hole and the first mounting hole are connected by a first fastener.

[0011] Based on the above technical solutions, preferably, the length direction of the waist-shaped hole is perpendicular to the length direction of the first mounting hole.

[0012] Based on the above technical solutions, preferably, the connector includes an integrally formed first connecting plate and a second connecting plate, wherein the first connecting plate and the second connecting plate are vertically arranged; the first connecting plate is connected to the base plate; and the second connecting plate is connected to the sliding structure.

[0013] Based on the above technical solutions, preferably, the mounting structure includes a first mounting plate and a second mounting plate arranged vertically, wherein the parallel slide rail is disposed on the side of the first mounting plate opposite to the second mounting plate.

[0014] Based on the above technical solutions, preferably, one of the sliding structure and the parallel slide rail is a concave groove structure and the other is a convex protrusion structure.

[0015] Based on the above technical solutions, preferably, the second mounting plate is provided with a welding device for welding the positive and negative tabs of the battery cell.

[0016] In summary, the ultrasonic welding fixture provided by this utility model has the following advantages over the prior art: (1) By sliding the sliding structure and sliding the parallel slide rail, after one electrode is welded, the other electrode can be moved to the welding position by sliding horizontally. The electrode can be positioned and welded at different positions without flipping the battery cell, thus avoiding damage to the battery cell caused by the flipping action. (2) By sliding the structure and the parallel slide rail, the number of steps for flipping the battery cell is reduced, and the welding efficiency is improved. (3) By engaging the stop block with the limit frame, the accurate placement of the battery cell is ensured, and the welding quality is improved; (4) By using the stop block to drive the limit frame to change position, it can more flexibly adapt to the positioning and welding needs of different sizes and shapes of electrode tabs. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a three-dimensional structural diagram of an embodiment of the present utility model; Figure 2 This is a top view of an embodiment of the present utility model; Figure 3 This is a schematic diagram of the stop block structure according to an embodiment of the present utility model; Figure 4 This is a schematic diagram of the base plate structure of an embodiment of the present utility model; Figure 5 This is a schematic diagram of the first mounting plate structure in this utility model; Figure 6 This is a schematic diagram of the battery cell in this utility model; The meanings of the reference numerals in the attached drawings are as follows: 1. Mounting structure; 11. First mounting plate; 12. Second mounting plate; 2. Parallel slide rail; 3. Sliding structure; 4. Base plate; 41. Slot; 42. First mounting hole; 43. Fourth mounting hole; 431. Second fastener; 5. Connector; 51. First connecting plate; 511. Second mounting hole; 52. Second connecting plate; 521. Third mounting hole; 53. Third connecting plate; 6. Limiting frame; 61. Limiting plate; 7. Stop; 71. First limiting part; 72. Second limiting part; 73. Waist-shaped hole; 8. Welding device; 9. Battery cell; 91. Positive electrode tab; 92. Negative electrode tab. Detailed Implementation

[0019] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0020] See Figures 1-6 This utility model discloses an ultrasonic welding fixture for welding soft-pack battery cells 9, including an installation structure 1, a parallel slide rail 2, a sliding structure 3, a base plate 4, a connector 5, a limiting frame 6, a stop block 7, and a welding device 8.

[0021] See Figure 1 and Figure 5 As shown, the mounting structure 1 includes a first mounting plate 11 and a second mounting plate 12. The first mounting plate 11 is vertically disposed on one side of the second mounting plate 12. The vertical arrangement of the first mounting plate 11 and the second mounting plate 12 provides a stable mounting foundation, facilitating the installation and layout of other components. In this embodiment, the first mounting plate 11 and the second mounting plate 12 are integrally molded, which facilitates manufacturing and processing. The first mounting plate 11 and the second mounting plate 12 can be made of high-strength metal materials such as aluminum alloy. Aluminum alloy is lightweight and high-strength, which can meet the structural strength requirements while reducing the overall weight of the tooling. It should also be noted that the mounting structure 1 can be disposed on other components to ensure the stability of the mounting structure 1 and the stability after the soft-pack battery cell 9 is placed, preventing tipping. Specific details and limitations are not provided here.

[0022] See Figure 1 , Figure 2 and Figure 5As shown, the parallel slide rail 2 is disposed on the side of the first mounting plate 11 opposite to the second mounting plate 12. The parallel slide rail 2 is disposed along the length direction of the first mounting plate 11. The parallel slide rail 2 is made of stainless steel, which has good wear resistance and corrosion resistance, and can ensure the accuracy and stability of the slide rail during long-term use. The sliding structure 3 is slidably connected to the parallel slide rail 2 and reciprocates with the parallel slide rail 2. The sliding structure 3 can also be made of stainless steel, which has good wear resistance and corrosion resistance, and can ensure the accuracy and stability of the slide rail during long-term use. Among them, one of the sliding structure 3 and the parallel slide rail 2 is a concave groove structure and the other is a convex protrusion structure. This structure can ensure that the sliding structure 3 slides smoothly on the parallel slide rail 2. The combination of the groove and the protrusion structure makes the sliding structure 3 slide smoothly and can ensure the accuracy of the sliding direction, reducing the shaking and deviation during the sliding process. The sliding structure 3, acting as the driving component for the subsequent movement of the base plate 4, slides on the parallel slide rail 2, driving the base plate 4 and the soft-pack battery cell 9 located thereon to move, thereby adjusting the position of the soft-pack battery cell 9. Specifically, in this embodiment, the parallel slide rail 2 is an outwardly convex structure, and the sliding structure 3 is an inwardly concave groove structure. In some other embodiments, to ensure welding efficiency, a driving structure can also be provided to push the sliding structure 3 to move.

[0023] See Figure 1 and Figure 6 As shown, the welding device 8 is mounted on the second mounting plate 12, and the welding device 8 is an ultrasonic welding device used to weld the positive tab 91 and negative tab 92 of the soft-pack battery cell 9. Specifically, when placed, one side of the positive tab 91 and negative tab 92 of the soft-pack battery cell 9 faces the welding device 8, and the direction of the positive tab 91 and negative tab 92 of the soft-pack battery cell 9 is perpendicular to the sliding direction of the parallel slide rail 2 and the sliding structure 3. The ultrasonic welding is performed on the positioned positive tab 91 and negative tab 92 of the soft-pack battery cell 9 to realize the power output of the soft-pack battery cell 9.

[0024] See Figure 4As shown, a limiting frame 6 is provided on the base plate 4. The limiting frame 6 is used to place stacked soft-pack battery cells 9. The connection between the limiting frame 6 and the base plate 4 is a movable connection, that is, the position of the limiting frame 6 on the base plate 4 can be adjusted. The base plate 4 is connected to the sliding structure 3 through the connector 5, so that the base plate 4 moves with the reciprocating movement of the sliding structure 3. The stop block 7 is movably set on the base plate 4 and is engaged with the limiting frame 6. The stop block 7 can change its position on the base plate 4 to drive the limiting frame 6 to change its position. Specifically, the direction in which the stop block 7 drives the limiting frame 6 to change its position can be perpendicular to or parallel to the direction of sliding movement of the parallel slide rail 2 and the sliding structure 3. This design allows for the adjustment of soft-pack battery cells 9 of different sizes and dimensions by changing the position of the limiting frame 6 through the stop block 7, resulting in better adaptability.

[0025] See Figure 4 As shown, at least four stops 7 are provided, located on two opposite sides of the base plate 4, to achieve locking of the limiting frame 6. Each stop 7 has a slotted hole 73, and the base plate 4 has a first mounting hole 42, also located on two opposite sides of the base plate 4, corresponding to the stop 7. The slotted hole 73 and the first mounting hole 42 are connected by a first fastener. This design ensures the stability of the stop 7 through the first fastener, achieving good clamping of the limiting frame 6.

[0026] Specifically, in this embodiment, the first fastener is a bolt and a nut that is tightened to the bolt. The bolt and nut connection is simple and reliable, easy to disassemble and install, and can easily adjust and fix the position of the stop 7.

[0027] More specifically, the length direction of the waist-shaped hole 73 is perpendicular to the length direction of the first mounting hole 42. This design allows the stop block 7 to be adjusted in two mutually perpendicular directions. When it is necessary to adjust the position of a longer soft-pack battery cell 9, the mounting position of the first mounting hole 42 is fixed. By adjusting the different positions of the waist-shaped hole 73, the distance between the soft-pack battery cell 9 and the welding device 8 can be adjusted, which is suitable for soft-pack battery cells 9 of different lengths. When it is necessary to adjust the position of a wider soft-pack battery cell 9, the mounting position of the waist-shaped hole 73 is fixed. By adjusting the different positions of the first mounting hole 42, soft-pack battery cells 9 of different widths can be adapted.

[0028] In this embodiment, the stop block 7 has a first limiting part 71, which extends from the bottom of the stop block 7 near the welding device 8 toward the center of the base plate 4. The first limiting part 71 engages with the outer side of the limiting frame 6, thus preventing the limiting frame 6 from moving. This design provides better fixation.

[0029] When the position of the limiting frame 6 is adjusted to the side away from the welding device 8, and then the direction of the welding device 8 is moved, there will be a gap between the limiting frame 6 and the stop 7. A slot 41 is provided on the side of the base plate 4 away from the stop 7 to push the outer side of the limiting frame 6 to move the first limiting part 71, so that a finger can be inserted into the slot 41 to push the limiting frame 6 to move and engage with the first limiting part 71.

[0030] In other embodiments, the stop block 7 also has a second limiting part 72. The second limiting part 72 extends upward from the side of the stop block 7 near the welding device 8 towards the center of the base plate 4. The distance between the second limiting part 72 and the center of the base plate 4 is greater than the distance between the first limiting part 71 and the center of the base plate 4. The limiting frame 6 extends away from the base plate 4 and a limiting plate 61 is provided. The second limiting part 72 engages with the outer side of the limiting plate 61. The engagement between the second limiting part 72 and the limiting plate 61 further improves the effect of preventing the movement of the limiting frame 6.

[0031] See Figure 1 , Figure 4 and Figure 5 As shown, the connector 5 includes a first connecting plate 51 and a second connecting plate 52. The first connecting plate 51 and the second connecting plate 52 are integrally formed and are perpendicularly arranged. The integrally formed structure ensures the strength and stability of the connector 5. The vertically arranged first connecting plate 51 and second connecting plate 52 can accurately transmit the movement of the sliding structure 3 to the base plate 4 and are firmly connected. The first connecting plate 51 is connected to the base plate 4, and the second connecting plate 52 is connected to the sliding structure 3. The connector 5 connects the base plate 4 and the sliding structure 3, and transmits the reciprocating movement of the sliding structure 3 to the base plate 4, so that the base plate 4 can move with the movement of the sliding structure 3, and the synchronous movement effect is better.

[0032] It should be noted that a third connecting plate 53 is also provided between the first connecting plate 51 and the second connecting plate 52 to further improve the strength of the connection.

[0033] Specifically, the first connecting plate 51 has a second mounting hole 511, the second connecting plate 52 has a third mounting hole 521, the base plate 4 has a fourth mounting hole 43 that mates with the second mounting hole 511, and the sliding structure 3 has a fifth mounting hole that mates with the third mounting hole 521. The third mounting hole 521 and the fourth mounting hole 43 are elongated, and the second mounting hole 511 and the fifth mounting hole are hole-shaped. The second mounting hole 511 and the fourth mounting hole 43, as well as the third mounting hole 521 and the fifth mounting hole, are connected by a second fastener 431. By adjusting the fourth mounting hole 43 at different positions to mate with the second mounting hole 511, it is possible to further adjust and adapt to soft-pack battery cells 9 of different lengths. By adjusting the fifth mounting hole at different positions to mate with the third mounting hole 521, it is possible to adjust and adapt to soft-pack battery cells 9 of different heights.

[0034] Specifically, in this embodiment, the second fastener 431 is a bolt and a nut that is tightened to the bolt. The bolt and nut connection is simple and reliable, easy to disassemble and install, and can easily adjust and fix the position of the stop 7.

[0035] Specific implementation steps Place the soft-pack battery cell 9 on the limiting frame 6. When the positive tab 91 and negative tab 92 of the soft-pack battery cell 9 are too close or too far from the welding device 8, adjust the position of the waist-shaped hole 73 on the stop block 7 or adjust the position of the fourth mounting hole 43 to ensure that the distance between the positive tab 91 and negative tab 92 of the soft-pack battery cell 9 and the welding device 8 is appropriate. After the positive tab 91 is welded, slide the sliding structure 3 along the parallel slide rail 2 to make the negative tab 92 correspond to the welding device 8 for welding. After both the positive tab 91 and negative tab 92 are welded, they can be removed.

[0036] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An ultrasonic welding fixture, characterized in that, It includes an installation structure (1), a parallel slide rail (2), a sliding structure (3), a base plate (4), a connector (5), a limiting frame (6), and a stop block (7), among which, The parallel slide rail (2) is mounted on the mounting structure (1); The sliding structure (3) is slidably connected to the parallel slide rail (2) and can reciprocate relative to the parallel slide rail (2); A limit frame (6) is provided on the base plate (4), and a waist-shaped hole (73) is provided on the base plate (4). The connector (5) is used to connect the base plate (4) and the sliding structure (3) so that the base plate (4) moves with the reciprocating movement of the sliding structure (3); The limiting frame (6) is used to place stacked battery cells (9). The stop block (7) is movably disposed on the base plate (4), and the stop block (7) is engaged with the limiting frame (6). The stop block (7) can change its position on the base plate (4) to drive the limiting frame (6) to change its position.

2. The ultrasonic welding fixture according to claim 1, characterized in that, The stop block (7) has a first limiting part (71), which is engaged with the outer side of the limiting frame (6).

3. The ultrasonic welding fixture according to claim 2, characterized in that, The base plate (4) is provided with a slot (41) on the side away from the stop (7) for pushing the outer side of the limiting frame (6) to move towards the first limiting part (71).

4. The ultrasonic welding fixture according to claim 2, characterized in that, The limiting frame (6) extends away from the base plate (4) and a limiting plate (61) is provided. The stop block (7) is provided with a second limiting part (72), which is engaged with the outer side of the limiting plate (61).

5. The ultrasonic welding fixture according to claim 1, characterized in that, The stop block (7) has a waist-shaped hole (73), and the base plate (4) has a first mounting hole (42). The waist-shaped hole (73) and the first mounting hole (42) are connected by a first fastener.

6. The ultrasonic welding fixture according to claim 5, characterized in that, The length direction of the waist-shaped hole (73) is perpendicular to the length direction of the first mounting hole (42).

7. The ultrasonic welding fixture according to claim 1, characterized in that, The connector (5) includes an integrally formed first connecting plate (51) and a second connecting plate (52), wherein, The first connecting plate (51) and the second connecting plate (52) are arranged vertically; The first connecting plate (51) is connected to the base plate (4); The second connecting plate (52) is connected to the sliding structure (3).

8. The ultrasonic welding fixture according to claim 1, characterized in that, The mounting structure (1) includes a first mounting plate (11) and a second mounting plate (12) arranged vertically, wherein, The parallel slide rail (2) is located on the side of the first mounting plate (11) away from the second mounting plate (12).

9. An ultrasonic welding fixture according to claim 1 or 8, characterized in that, Of the sliding structure (3) and the parallel slide rail (2), one is a concave groove structure and the other is a convex protrusion structure.

10. An ultrasonic welding fixture according to claim 8, characterized in that, The second mounting plate (12) is provided with a welding device (8) for welding the positive tab (91) and negative tab (92) of the battery cell (9).

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