Electrode fusion welding apparatus elastic platform

Abstract

The present application relates to the technical field of ultrasonic welding, and discloses an electrode fusion welding device elastic platform, which comprises a platform base, a mounting seat and a supporting seat fixedly connected to the upper surface of the platform base, the mounting seat is provided with an ultrasonic welding device, the ultrasonic welding device comprises a movable welding head which can move in the vertical direction, and the upper surface of the mounting seat is fixedly connected with a fixed welding head corresponding to the movable welding head on one side of the lower end of the mounting seat, the movable welding head is connected with the fixed welding head through a pre-pressing mechanism, the pre-pressing mechanism comprises a positioning rod fixedly connected to the movable welding head, and the upper surface of the supporting seat is provided with a cavity plate through a sliding rail assembly. The pre-pressing mechanism is arranged, the electrode can be pre-adsorbed and compressed during the descending process of the movable welding head, the stability of the welding electrode is improved, and after welding, the clamping frame for mounting the battery core can be quickly bounced up through the elasticity of the spring one and the spring two, so that the welded electrode can be quickly separated.

Description

Technical Field

[0001] This invention relates to the field of ultrasonic welding technology, specifically to an elastic platform for electrode fusion welding apparatus. Background Technology

[0002] A lithium battery cell typically consists of multiple copper and aluminum foils that are interleaved. Both the copper and aluminum foils have strips that extend to form tabs. All the copper foil tabs are located on one side of the cell end and form the negative electrode post, while all the aluminum foil tabs are located on the other side of the cell end and form the positive electrode post. After all the copper foil tabs and all the aluminum foil tabs are welded and fixed by welding equipment, the cell is formed. The cells are then combined in different series and parallel connections to form a battery module.

[0003] An electrode welding platform is a platform used for welding electrodes of battery cells. When using it, the battery cell needs to be placed on a clamping structure. Then, the clamping structure is slid to bring the electrode into the welding area of ​​the ultrasonic welding device. The electrode is then welded by moving the welding head on the ultrasonic welding device.

[0004] Existing electrode welding platforms cannot pre-compress the electrodes during use, which is not conducive to stable and rapid welding, and also makes it difficult for the electrodes to detach after welding.

[0005] Therefore, a flexible platform for electrode fusion welding apparatus is needed to solve the above problems. Summary of the Invention

[0006] The purpose of this invention is to provide an elastic platform for an electrode welding apparatus, in order to solve the problems mentioned in the background art, namely that existing electrode welding platforms cannot pre-compress the electrodes and do not provide a way to quickly detach the electrodes from the structure after welding.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] An elastic platform for electrode welding includes a platform base and a mounting seat and a support seat fixedly connected to its upper surface. The mounting seat is equipped with an ultrasonic welding device, which includes a movable welding head that can move vertically. A fixed welding head corresponding to the movable welding head is fixedly connected to a raised upper surface on one side of the lower end of the mounting seat. The movable welding head is connected to the fixed welding head via a pre-pressing mechanism, which includes a positioning rod fixedly connected to the movable welding head. A cavity plate is mounted on the upper surface of the support seat via a slide rail assembly. The cavity plate is connected to a clamping frame via a negative pressure communication mechanism. One end of the clamping frame is axially connected to a clamping cover plate. An extension plate is mounted on the clamping frame, and the extension plate has strip-shaped through holes penetrating both sides. The negative pressure communication mechanism includes a piston tube penetrating the upper surface of the cavity plate. A positioning mechanism corresponding to the positioning rod is provided on the side of the cavity plate facing the mounting seat. The positioning mechanism includes a positioning plate fixedly connected to the side of the cavity plate.

[0009] Preferably, the slide rail assembly consists of slide rails and pulleys. Two slide rails are fixed parallel to each other on the upper surface of the support base, and the pulleys are installed on the lower surface of the cavity plate and slidably connected to the corresponding slide rails.

[0010] Preferably, the pre-compression mechanism further includes piston boxes fixedly connected to both sides of the protrusion at the lower end of the mounting base, and the opening end of each piston box is seamlessly connected to a piston seat. The piston end of the piston seat is seamlessly slidably connected to the inner side of the corresponding piston box, and the two piston seats are symmetrically arranged about the axis of the positioning rod. A second spring is provided between the piston end of the piston seat and the inner end of the corresponding piston box, and a vent hole penetrating to the outside is provided on the inner end of the piston box.

[0011] Preferably, the fixed welding head is configured as a hollow structure, and an adsorption hole extending through to the upper surface of the fixed welding head is provided in the hollow structure. A gas guide pipe is provided in the protrusion at the lower end of the mounting base, and the gas guide pipe passes through the piston box and the hollow structure on the fixed welding head.

[0012] Preferably, the piston seat has a right-angled triangular prism structure at the seat end, and the lower end of the positioning rod has an isosceles triangular prism structure, with the upper end of the isosceles triangular prism having the same length as the upper end of the positioning rod, and the hypotenuses of the two piston seats facing the two inclined surfaces of the isosceles triangular prism respectively.

[0013] Preferably, the negative pressure communication mechanism further includes a through hole connecting the piston tube and the interior of the cavity plate, and the through hole is provided on the piston tube. The piston end of the piston rod is seamlessly slidably connected to the inner side of the upper opening of the piston tube, and the rod end of the piston rod is fixedly connected to the lower surface of the clamping frame. A spring is provided between the lower surface of the clamping frame and the upper end of the piston tube, which is sleeved on the outer side of the corresponding piston rod. The interior of the cavity plate is connected to the piston box through a through flexible tube.

[0014] Preferably, the distance between the end of the through hose connected to the piston box and the opening of the piston box is less than the minimum distance between the piston end on the piston seat and the corresponding opening end of the piston box, and the distance between the end of the air guide tube connected to the piston box and the opening of the piston box is also less than the minimum distance between the piston end on the piston seat and the corresponding opening end of the piston box.

[0015] Preferably, the positioning mechanism further includes two positioning holes penetrating the positioning plate, and a lower magnetic block is provided on the upper surface of the positioning plate, the lower magnetic block being disposed between the two positioning holes, and an upper magnetic block being provided on the lower surface of each piston box.

[0016] Preferably, the lower middle section of the positioning hole matches the upper middle section of the positioning rod, and the upper end of the positioning hole is an inverted truncated pyramid structure.

[0017] Preferably, the magnetic poles at the upper end of the lower magnetic block are opposite to those at the lower end of the upper magnetic block.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] The elastic platform of this electrode welding device is equipped with a pre-pressure mechanism, which can pre-adsorb and press the electrode during the descent of the moving welding head, helping to improve the stability of the welding electrode. After welding, the elasticity of springs one and two allows the clamping frame for mounting the battery cell to quickly spring up, facilitating the rapid separation of the welded electrode.

[0020] 1. As the moving welding head moves downward, the positioning rod will descend rapidly, squeezing the two piston seats. The two piston seats move away from each other, thereby creating negative pressure in the cavity plate and the hollow structure on the fixed welding head. The negative pressure in the cavity plate will cause the clamping frame to descend rapidly, making the extension plate contact the upper surface of the fixed welding head. Thereafter, the hollow structure on the fixed welding head will continue to generate negative pressure as the positioning rod continues to descend, which will allow the electrode to be attracted through the strip-shaped through hole on the extension plate, thereby achieving pre-tightening and helping to improve the stability of the welding electrode.

[0021] 2. After welding, the moving welding head moves upward and the positioning rod rises rapidly. After the positioning rod separates from the two piston seats, the two piston seats and the clamping frame are instantly reset by spring one and spring two, which helps the battery cell to bounce up with the clamping frame so as to quickly separate the welded electrodes. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the main structure of the present invention;

[0023] Figure 2 This is a schematic diagram of the structure of the present invention from a bottom view;

[0024] Figure 3 This is a schematic diagram of a partial cross-sectional view of the cavity plate of the present invention;

[0025] Figure 4 For the present invention Figure 3 Enlarged structural diagram of point A in the middle;

[0026] Figure 5 This is a schematic cross-sectional view of the connection between the cavity plate and the piston box of the present invention;

[0027] Figure 6 This is a partial cross-sectional view of the mounting base of the present invention;

[0028] Figure 7 For the present invention Figure 6 Enlarged structural diagram of point B;

[0029] Figure 8 This is a schematic cross-sectional view of the positioning plate of the present invention;

[0030] Figure 9 For the present invention Figure 8 A magnified structural diagram of point C.

[0031] In the diagram: 1. Platform base; 2. Mounting seat; 3. Support seat; 4. Slide rail assembly; 5. Cavity plate; 6. Clamping frame; 7. Clamping cover plate; 8. Piston box; 9. Vent hole; 10. Moving welding head; 11. Positioning plate; 12. Positioning hole; 13. Piston rod; 14. Piston tube; 15. Through hole; 16. Spring one; 17. Piston seat; 18. Positioning rod; 19. Through hose; 20. Fixed welding head; 21. Air guide pipe; 22. Lower magnetic block; 23. Upper magnetic block; 24. Extension plate; 25. Spring two. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] Please see Figures 1-9 The present invention provides the following technical solution:

[0034] Example 1: To address the problem that previous electrode welding platforms lacked a pre-compression structure and could not quickly separate the electrodes after welding, the following technical solution is provided: An elastic platform for the electrode welding device includes a platform base 1, a mounting base 2, and a support base 3 fixedly connected to its upper surface. The mounting base 2 is equipped with an ultrasonic welding device, which includes a movable welding head 10 that can move vertically. A fixed welding head 20, corresponding to the movable welding head 10, is fixedly connected to the raised upper surface of one side of the lower end of the mounting base 2. The movable welding head 10 is connected to the fixed welding head 20 via a pre-compression mechanism. Next, the pre-pressing mechanism includes a positioning rod 18 fixedly connected to the moving welding head 10. The upper surface of the support base 3 is equipped with a cavity plate 5 via a slide rail assembly 4. The cavity plate 5 is connected to a clamping frame 6 via a negative pressure communication mechanism. One end of the clamping frame 6 is axially connected to a clamping cover plate 7. An extension plate 24 is installed on the clamping frame 6, and the extension plate 24 is provided with strip-shaped through holes penetrating both sides. The negative pressure communication mechanism includes a piston tube 14 penetrating the upper surface of the cavity plate 5. The slide rail assembly 4 consists of slides and pulleys. Two slides are fixed parallel to each other on the upper surface of the support base 3, and the pulleys are installed on the lower surface of the cavity plate 5. The pulleys are slidably connected to the corresponding slides.

[0035] The pre-compression mechanism also includes piston boxes 8 fixedly connected to both sides of the lower protrusion of the mounting base 2, and piston seats 17 are seamlessly inserted through the opening ends of the piston boxes 8. The piston ends of the piston seats 17 are seamlessly slidably connected to the inner side of the corresponding piston boxes 8, and the two piston seats 17 are symmetrically arranged about the axis of the positioning rod 18. A spring 25 is provided between the piston end of the piston seat 17 and the inner end of the corresponding piston box 8, and a vent hole 9 extending to the outside is provided on the inner end of the piston box 8. The fixed welding head 20 is a hollow structure, and an adsorption hole extending to the upper surface of the fixed welding head 20 is provided inside the hollow structure. A vent pipe 21 is provided inside the lower protrusion of the mounting base 2, and the vent pipe 21 passes through the hollow structure on the piston box 8 and the fixed welding head 20. The seat end of the piston seat 17 The positioning rod 18 has a right-angled triangular prism structure. The lower end of the positioning rod 18 is an isosceles triangular prism structure, and the upper end of the isosceles triangular prism has the same length as the upper end of the positioning rod 18. The hypotenuses of the two piston seats 17 face the two inclined surfaces of the isosceles triangular prism. The negative pressure communication mechanism also includes a through hole 15 connecting the piston tube 14 and the interior of the cavity plate 5. The through hole 15 is located on the piston tube 14. The piston end of the piston rod 13 is seamlessly slidably connected to the inner side of the upper opening of the piston tube 14. The rod end of the piston rod 13 is fixedly connected to the lower surface of the clamping frame 6. A spring 16 is provided between the lower surface of the clamping frame 6 and the upper end of the piston tube 14 and sleeved on the outer side of the corresponding piston rod 13. The interior of the cavity plate 5 is connected to the piston box 8 through a through hose 19. The distance between the end of the through hose 19 connected to the piston box 8 and the opening of the piston box 8 is less than the minimum distance between the piston end on the piston seat 17 and the opening end of the corresponding piston box 8, and the distance between the end of the air guide tube 21 connected to the piston box 8 and the opening of the piston box 8 is also less than the minimum distance between the piston end on the piston seat 17 and the opening end of the corresponding piston box 8.

[0036] according to Figures 1-7 When in use, open the clamping cover plate 7 and put the electrode core to be welded into the clamping frame 6. After the electrode core is put into the clamping frame 6, the electrode on it is supported on the upper surface of the extension plate 24.

[0037] The cavity plate 5 is slid on the support base 3 by the slide rail assembly 4, thereby moving the electrode to be welded on the battery cell between the moving welding head 10 and the fixed welding head 20. Then the ultrasonic welding device is started, causing the moving welding head 10 to move downward quickly.

[0038] During the process, the moving welding head 10 drives the positioning rod 18 to descend rapidly and synchronously, thereby quickly squeezing the two piston seats 17 and causing the two piston seats 17 to move away from each other. This creates a negative pressure between the piston end of the piston seat 17 and the opening end of the corresponding piston box 8. At this time, the gas in the cavity plate 5 flows into the piston box 8 rapidly through the through hose 19.

[0039] As the gas flows into the piston box 8 from the cavity plate 5, the clamping frame 6 will descend rapidly, which will cause the extension plate 24 to be quickly supported on the upper surface of the fixed welding head 20.

[0040] After the extension plate 24 contacts the fixed welding head 20, the clamping frame 6 stops descending, while the positioning rod 18 continues to descend, pressing the two piston seats 17 and causing a continuous negative pressure to be generated in the hollow structure on the fixed welding head 20. This allows the electrode to be adsorbed through the strip-shaped through hole on the extension plate 24, achieving pre-tightening of the electrode and ensuring the smooth and stable subsequent welding process.

[0041] Example 2: To solve the problem of poor positioning efficiency and effect of previous electrode welding platforms, the following technical solution is provided. Specifically, a positioning mechanism corresponding to the positioning rod 18 is provided on the side of the cavity plate 5 facing the mounting base 2. The positioning mechanism includes a positioning plate 11 fixedly connected to the side of the cavity plate 5.

[0042] The positioning mechanism also includes two positioning holes 12 penetrating the positioning plate 11, and a lower magnetic block 22 is provided on the upper surface of the positioning plate 11. The lower magnetic block 22 is located between the two positioning holes 12. An upper magnetic block 23 is provided on the lower surface of each piston box 8. The cross-section of the lower middle end of the positioning hole 12 matches the cross-section of the upper middle end of the positioning rod 18. The upper end of the positioning hole 12 is an inverted quadrangular truncated pyramid structure. The magnetic poles at the upper end of the lower magnetic block 22 are opposite to the magnetic poles at the lower end of the upper magnetic block 23.

[0043] according to Figure 2 and Figures 8-9 When in use, push the cavity plate 5 so that the cavity plate 5 can move on the support base 3 via the slide rail assembly 4;

[0044] During the process, the position of the cavity plate 5 is initially positioned by the mutual attraction between the lower magnetic block 22 and the upper magnetic block 23.

[0045] As the positioning rod 18 descends, it gradually extends into the upper end of the positioning hole 12. Since the upper end of the positioning hole 12 is an inverted truncated pyramid structure, the positioning rod 18 can be guided to gradually penetrate the positioning hole 12, thereby achieving further positioning of the cavity plate 5.

[0046] Since the process of the moving welding head 10 descending and cooperating with the fixed welding head 20 to weld the electrode is instantaneous, the positioning of the electrode during the welding process is also instantaneous, thus improving the efficiency and effectiveness of electrode positioning.

[0047] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0048] Although embodiments of the 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 invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An electrode fusion welding device elastic platform, comprising a platform base (1) and a mounting seat (2) and a supporting seat (3) fixedly connected to the upper surface of the platform base (1), characterized in that: The mounting base (2) is equipped with an ultrasonic welding device, which includes a movable welding head (10) that can move in the vertical direction. A fixed welding head (20) corresponding to the movable welding head (10) is fixedly connected to the upper surface of the lower end of the mounting base (2). The movable welding head (10) is connected to the fixed welding head (20) through a pre-pressing mechanism. The pre-pressing mechanism includes a positioning rod (18) fixedly connected to the movable welding head (10). A cavity plate (5) is mounted on the upper surface of the support base (3) through a slide rail assembly (4). A clamping frame (6) is connected via a negative pressure communication mechanism. One end of the clamping frame (6) is shaft-connected to a clamping cover plate (7). An extension plate (24) is installed on the clamping frame (6), and a strip-shaped through hole is provided on the extension plate (24) through both sides. The negative pressure communication mechanism includes a piston tube (14) that penetrates the upper surface of the cavity plate (5). A positioning mechanism corresponding to the positioning rod (18) is provided on the side of the cavity plate (5) facing the mounting base (2). The positioning mechanism includes a positioning plate (11) that is fixedly connected to the side of the cavity plate (5). The slide rail assembly (4) consists of slide rails and pulleys. Two slide rails are fixed parallel to each other on the upper surface of the support base (3), and the pulleys are installed on the lower surface of the cavity plate (5). The pulleys are slidably connected to the corresponding slide rails. The pre-compression mechanism also includes piston boxes (8) fixedly connected to both sides of the protrusion at the lower end of the mounting base (2), and piston seats (17) are seamlessly connected to the open ends of the piston boxes (8). The piston end of the piston seat (17) is seamlessly slidably connected to the inner side of the corresponding piston box (8), and the two piston seats (17) are symmetrically arranged about the axis of the positioning rod (18). A second spring (25) is provided between the piston end of the piston seat (17) and the inner end of the corresponding piston box (8), and a vent hole (9) is provided on the inner end of the piston box (8) to the outside. The fixed welding head (20) is configured as a hollow structure, and an adsorption hole is provided inside the hollow structure, which extends to the upper surface of the fixed welding head (20). A gas guide pipe (21) is provided inside the protrusion at the lower end of the mounting base (2), and the gas guide pipe (21) passes through the piston box (8) and the hollow structure on the fixed welding head (20).

2. The elastic platform of the electrode fusion welding device according to claim 1, characterized in that: The piston seat (17) has a right-angled triangular prism structure at the seat end, and the lower end of the positioning rod (18) has an isosceles triangular prism structure. The upper end length of the isosceles triangular prism is equal to the upper end width of the positioning rod (18). The hypotenuses of the two piston seats (17) are respectively oriented toward the two inclined surfaces of the isosceles triangular prism.

3. The elastic platform of the electrode fusion welding device according to claim 1, characterized in that: The negative pressure communication mechanism also includes a through hole (15) connecting the piston tube (14) and the cavity plate (5), and the through hole (15) is provided on the piston tube (14). The piston end of the piston rod (13) is seamlessly slidably connected to the inner side of the upper opening of the piston tube (14), and the rod end of the piston rod (13) is fixedly connected to the lower surface of the clamping frame (6). A spring (16) sleeved on the outside of the corresponding piston rod (13) is provided between the lower surface of the clamping frame (6) and the upper end of the piston tube (14). The cavity plate (5) is connected to the piston box (8) through a through hose (19).

4. The elastic platform of the electrode welding apparatus according to claim 3, characterized in that: The distance between the end of the through hose (19) connected to the piston box (8) and the opening of the piston box (8) is less than the minimum distance between the piston end on the piston seat (17) and the opening end of the corresponding piston box (8). The distance between the end of the air guide pipe (21) connected to the piston box (8) and the opening of the piston box (8) is also less than the minimum distance between the piston end on the piston seat (17) and the opening end of the corresponding piston box (8).

5. The elastic platform of the electrode welding apparatus according to claim 4, characterized in that: The positioning mechanism also includes two positioning holes (12) penetrating the positioning plate (11), and a lower magnetic block (22) is provided on the upper surface of the positioning plate (11). The lower magnetic block (22) is located between the two positioning holes (12), and an upper magnetic block (23) is provided on the lower surface of each piston box (8).

6. The elastic platform of the electrode welding apparatus according to claim 5, characterized in that: The lower section of the positioning hole (12) matches the upper section of the positioning rod (18), and the upper end of the positioning hole (12) is an inverted truncated pyramid structure.

7. The elastic platform of the electrode fusion welding device according to claim 6, characterized in that: The magnetic poles at the upper end of the lower magnetic block (22) are opposite to those at the lower end of the upper magnetic block (23).

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