Electrode welding device

Abstract

This invention relates to the field of lithium battery manufacturing equipment technology, and discloses an electrode tab welding device, including a feeding mechanism, an adhesive application mechanism, an adhesive rolling mechanism, a feeding mechanism, a cutting mechanism, and a welding mechanism. The electrode tab passes sequentially through the feeding mechanism, adhesive application mechanism, adhesive rolling mechanism, feeding mechanism, and cutting mechanism before extending into the welding mechanism. While the welding mechanism welds the first end of the electrode tab to the electrode sheet, the cutting mechanism cuts the electrode tab. The feeding mechanism includes an electrode tab feeding tray, a counterweight assembly, and a smoothing assembly. The counterweight assembly includes an upper roller and a counterweight, with the counterweight slidably positioned below the upper roller. One end of the electrode tab is wound around the electrode tab feeding tray, the other end of the electrode tab passes through the smoothing assembly and is pulled by the feeding mechanism, while the middle section of the electrode tab is wound around the counterweight and the upper roller. The slidingly positioned counterweight allows adjustment of the electrode tab tension to prevent the electrode tab from becoming soft and causing blockages during transport, thus affecting the electrode tab transport efficiency and stability.

Description

Technical Field

[0001] This invention relates to the field of lithium battery manufacturing equipment technology, and in particular to a tab welding device. Background Technology

[0002] The field of lithium battery manufacturing equipment technology has extremely high safety requirements for battery production. For example, lithium batteries require the tabs to be welded to the substrate. The tabs are metallic conductors led out from the positive and negative electrodes in the battery cell, forming the positive and negative electrodes of the lithium-ion power battery, and are used as contact points during battery charging and discharging. Therefore, the tabs must be fully welded to the cell electrode sheets. Currently, during the process of cutting and transporting the tabs to the welding station, due to the softness of the tabs, they are prone to blockage during transport, thus affecting the efficiency and stability of tab transport. Summary of the Invention

[0003] The purpose of this invention is to provide a tab welding device that can improve the transmission efficiency and stability of the tabs and prevent the tabs from getting blocked during transmission.

[0004] Based on the above concept, the technical solution adopted by this invention is as follows:

[0005] The electrode tab welding device includes a feeding mechanism, an adhesive application mechanism, an adhesive roller mechanism, a feeding mechanism, a cutting mechanism, and a welding mechanism arranged in sequence. The electrode tab passes through the feeding mechanism, the adhesive application mechanism, the adhesive roller mechanism, the feeding mechanism, and the cutting mechanism before reaching the welding mechanism. When the welding mechanism welds the first end of the electrode tab to the electrode sheet, the cutting mechanism cuts the electrode tab.

[0006] The feeding mechanism includes an electrode feeding tray, a counterweight assembly, and a smoothing assembly. The counterweight assembly includes an upper roller and a counterweight. The counterweight is slidably disposed below the upper roller. One end of the electrode is wound around the electrode feeding tray, and the other end passes through the smoothing assembly and is pulled by the feeding mechanism. The middle section of the electrode is wound around the counterweight and the upper roller. The feeding mechanism pulls the electrode to bring the counterweight closer to the upper roller. The electrode feeding tray releases the electrode to move the counterweight away from the upper roller.

[0007] As a preferred embodiment of the electrode welding device, the adhesive application mechanism includes a tape feeding tray, a tape pulling component, a tape cutter, and an adhesive application table. The tape pulling component is used to pull the first end of the tape wound on the tape feeding tray to the adhesive application table and is located below the electrode. The tape cutter is located between the adhesive application table and the tape pulling component and is used to cut the tape.

[0008] As a preferred embodiment of the electrode welding device, the adhesive application mechanism further includes a detection component, which includes a detection switch, a swing arm guide roller, a first passing roller, and a second passing roller. The first passing roller and the second passing roller are located on both sides of the swing arm guide roller and above the swing arm guide roller, respectively. The first end of the adhesive tape passes through the first passing roller, the swing arm guide roller, and the second passing roller in sequence to the adhesive pulling component. If the adhesive tape does not pass through the first passing roller, the swing arm guide roller triggers the detection switch.

[0009] As a preferred embodiment of the electrode welding device, the detection component further includes a first limiting protrusion located on the side of the swing arm guide roller near the first passing roller, and the first limiting protrusion is used to limit the angle at which the swing arm guide roller swings toward the side of the first passing roller.

[0010] As a preferred embodiment of the electrode welding device, the detection component further includes a second limiting protrusion located on the side of the swing arm guide roller near the second passing roller, and the second limiting protrusion is used to limit the shortest distance between the swing arm guide roller and the detection switch.

[0011] As a preferred embodiment of the electrode welding device, the roller coating mechanism includes a roller coating base plate and a roller coating roller. The roller coating base plate is provided with air blowing holes. The electrode has a first surface and a second surface arranged opposite to each other along its own thickness direction. The first surface of the electrode abuts against the roller coating base plate. The air blowing holes are used to move the tape that is not in contact with the first surface away from the roller coating base plate. The roller coating roller rolls back and forth along the length direction perpendicular to the electrode, so that the tape on both sides perpendicular to the length direction of the electrode is in contact with the second surface.

[0012] As a preferred embodiment of the electrode welding device, the adhesive roller mechanism further includes a color sensor for detecting whether the adhesive tape is adhered to the second surface.

[0013] As a preferred embodiment of the electrode welding device, the feeding mechanism includes a pressing element and a feeding base. The pressing element is used to clamp the electrode from both sides in the thickness direction of the electrode, and the feeding base is used to drive the pressing element to move relative to the welding mechanism.

[0014] As a preferred embodiment of the electrode welding device, the cutting mechanism includes an electrode cutter, a shock-absorbing block, and a cutting base. The shock-absorbing block is used to press the electrode against the cutting base, and the electrode cutter cuts the fixed electrode.

[0015] As a preferred embodiment of the electrode welding device, the welding mechanism includes an upper welding film and a lower welding film, wherein the upper welding film and the lower welding film clamp the head end of the electrode and the electrode sheet to weld the electrode and the electrode sheet.

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

[0017] This invention proposes an electrode tab welding device, comprising a feeding mechanism, an adhesive application mechanism, an adhesive rolling mechanism, a feeding mechanism, a cutting mechanism, and a welding mechanism arranged sequentially. The electrode tab passes through these mechanisms before extending into the welding mechanism. While the welding mechanism welds the first end of the electrode tab to the electrode sheet, the cutting mechanism cuts the electrode tab. Because one end of the electrode tab is fixed by the welding mechanism and the other end by the cutting mechanism during welding, the electrode tab is less prone to movement, ensuring the accuracy of the welding and cutting positions. Furthermore, the feeding mechanism includes an electrode tab feeding tray, a counterweight assembly, and a smoothing assembly. The counterweight assembly includes an upper roller and a counterweight, with the counterweight slidably positioned below the upper roller. One end of the electrode tab is wound around the electrode tab feeding tray, the other end passes through the smoothing assembly and is pulled by the feeding mechanism, while the middle section of the electrode tab is wound around the counterweight and the upper roller. The tension of the electrode tab can be adjusted by a sliding counterweight. Since the electrode tab is intermittently fed through the electrode tab feeding tray, when the electrode tab is released from the feeding tray, the counterweight slides downward to tighten the electrode tab and prevent blockage during conveying. When the electrode tab is pulled by the feeding mechanism, the counterweight slides upward to reduce the length of the electrode tab between the smoothing component and the electrode tab feeding tray, so that the tension of the electrode tab is always within a preset range, thereby ensuring the conveying efficiency and stability of the electrode tab. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the electrode welding device from a first perspective provided in an embodiment of the present invention;

[0019] Figure 2 This is a schematic diagram of the electrode welding device from a second perspective (without a feeding mechanism) provided in an embodiment of the present invention;

[0020] Figure 3 This is a schematic diagram of the electrode welding device from a third-view perspective provided in an embodiment of the present invention;

[0021] Figure 4 yes Figure 3 Enlarged view of point A in the middle;

[0022] Figure 5 yes Figure 3 Enlarged view of point B in the middle.

[0023] In the picture:

[0024] 1. Feeding mechanism; 11. Feeding tray with electrode tabs; 12. Counterweight assembly; 121. Upper roller; 122. Counterweight; 123. Guide roller; 124. Slide rail; 125. Upper position switch; 126. Lower position switch; 13. Smoothing assembly;

[0025] 2. Adhesive application mechanism; 21. Adhesive tape feeding tray; 22. Adhesive pulling component; 221. Adhesive pressing block; 2211. Vent hole; 23. Adhesive tape cutter; 24. Adhesive application component; 241. Adhesive application table; 242. Pressing block; 25. Detection assembly; 251. Detection switch; 252. Swing arm guide roller; 253. First guide roller; 254. Second guide roller; 255. First limit protrusion; 256. Second limit protrusion;

[0026] 3. Roller glue mechanism; 31. Roller glue base plate; 311. Air blowing hole; 32. Roller glue roller; 33. Color sensor;

[0027] 4. Feeding mechanism; 41. Pressing component; 42. Feeding base;

[0028] 5. Cutting mechanism; 51. Electrode cutter; 52. Shock absorber; 521. Elastic part; 522. Fixing part; 53. Cutting base;

[0029] 6. Welding mechanism; 61. Upper weld bead; 62. Lower weld bead;

[0030] 7. Welding base; 71. Upper base; 72. Lower base;

[0031] 10. Electrode; 20. Adhesive tape. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0033] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0034] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0035] In the description of this invention, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the referred or indicated element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0036] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0037] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0038] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0039] like Figures 1 to 5As shown, this embodiment provides an electrode tab welding device, including a feeding mechanism 1, an adhesive application mechanism 2, an adhesive rolling mechanism 3, a feeding mechanism 4, a cutting mechanism 5, and a welding mechanism 6 arranged sequentially. The electrode tab 10 passes through the aforementioned feeding mechanism 1, adhesive application mechanism 2, adhesive rolling mechanism 3, feeding mechanism 4, and cutting mechanism 5 before extending into the welding mechanism 6. In the welding mechanism 6, the electrode tab 10 with adhesive already applied is welded to the electrode sheet. Simultaneously, the cutting mechanism 5, located between the feeding mechanism 4 and the welding mechanism 6, cuts the electrode tab 10 at corresponding positions to separate the electrode tab 10 welded to the electrode sheet from the electrode tab 10 not welded to the electrode sheet. Because one end of the electrode tab 10 is fixed by the welding mechanism 6 and the other end is fixed by the cutting mechanism 5 during the welding process, and because the cutting and welding are performed simultaneously, the electrode tab 10 is not easily moved during this process, ensuring the accuracy of the welding and cutting positions.

[0040] In addition, to prevent the tabs 10 from becoming soft and causing blockages during conveying, thus affecting the conveying efficiency and stability of the tabs 10, the feeding mechanism 1 includes a tab feeding tray 11, a counterweight assembly 12, and a smoothing assembly 13, as detailed in the following document. Figure 1 It is known that the counterweight assembly 12 includes an upper roller 121 and a counterweight 122. The counterweight 122 is slidably disposed below the upper roller 121. One end of the tab 10 is wound around the tab feeding tray 11, and the other end of the tab 10 passes through the smoothing assembly 13 and is pulled by the feeding mechanism 4. The middle section of the tab 10 is wound around the counterweight 122 and the upper roller 121. The tension of the tab 10 can be adjusted by sliding the weight 122. Since the tab 10 is intermittently fed through the tab feeding tray 11, when the tab feeding tray 11 releases the tab 10, the weight 122 slides downward to tighten the tab 10 and prevent the tab 10 from getting blocked during conveying. When the tab 10 is pulled by the feeding mechanism 4, the weight 122 slides upward to reduce the length of the tab 10 between the smoothing component 13 and the tab feeding tray 11, so that the tension of the tab 10 is always within a preset range, thereby ensuring the conveying efficiency and stability of the tab 10.

[0041] In this specific implementation, the electrode feeding tray 11 rotates counterclockwise in this embodiment, and to facilitate the stable winding of the electrode 10 onto the counterweight assembly 12, two upper rollers 121 are provided, located on both sides of the counterweight 122. In other embodiments, the electrode feeding tray 11 can also rotate clockwise, in which case the upper roller 121 only includes one located downstream of the counterweight 122, and the electrode 10 passes directly downwards through the counterweight 122 after being pulled out from the electrode feeding tray 11. Both of the above structures can realize the up-and-down movement of the counterweight 122 during the pulling process of the electrode 10. Optionally, the feeding mechanism 1 also includes a guide roller 123, which is located between the counterweight assembly 12 and the smoothing assembly 13, that is, downstream of the counterweight assembly 12 and upstream of the smoothing assembly 13. The guide roller 123 is used to adjust the direction of the electrode 10 when it exits the counterweight assembly 12 and enters the smoothing assembly 13, so as to ensure the smoothing effect on the electrode 10.

[0042] Optionally, the feeding mechanism 1 also includes an upper position switch 125 and a lower position switch 126 located on the upper and lower sides of the counterweight 122, respectively. The upper position switch 125 is located at the highest safe position where the counterweight 122 slides upward. When the counterweight 122 slides upward beyond this position, the upper position switch 125 will issue an indication message, which is a feeding message, indicating that the electrode tab feeding tray 11 needs to be rotated to release the electrode tabs 10. The lower position switch 126 is located at the lowest safe position where the counterweight 122 slides downward. When the counterweight 122 slides downward beyond this position, the lower position switch 126 will issue an indication message, which is a cutting-off message, indicating that all the electrode tabs 10 wound on the electrode tab feeding tray 11 have been released.

[0043] Furthermore, such as Figure 2 As shown, the adhesive applicator 2 includes a tape feeding tray 21, a tape pulling component 22, a tape cutter 23, and an adhesive applicator 24. The tape pulling component 22 is used to pull the first end of the tape 20 wound on the tape feeding tray 21 onto the adhesive applicator 24, and is located below the tab 10. The tape cutter 23 is located between the adhesive applicator 24 and the tape pulling component 22, and is used to cut the tape 20 at corresponding positions. Figure 2 As shown, in this embodiment, the adhesive applicator 24 includes an adhesive applicator platform 241 and a pressing block 242. The pressing block is movably positioned above the adhesive applicator platform 241. The adhesive tape 20 will be located on the adhesive applicator platform 241. The pressing block 242 moves down to press against the tab 10 located on the adhesive applicator platform 241, so that the tab 10 and the adhesive tape 20 are in closer contact, and the adhesive tape 20 will adhere to the tab 10. The transmission direction of the adhesive tape 20 is perpendicular to the transmission direction of the tab 10. When the beginning end of the adhesive tape 20 is located below the tab 10, the tape cutter 23 will cut the beginning end of the adhesive tape 20 from the entire section of adhesive tape 20.

[0044] Preferably, the adhesive pulling component 22 clamps the adhesive tape 20 from both sides along its thickness direction, and then pulls the adhesive tape 20 toward one side of the application table 241, so that the first end of the adhesive tape 20 is positioned on the application table 241. Because the adhesive tape 20 is relatively soft and difficult to keep horizontal on its own, a vent hole 2211 is also provided on the side of the adhesive pulling component 22 near the application table 241. The vent holes 2211 are distributed on both sides of the adhesive tape 20 along its thickness direction. When the adhesive pulling component 22 pulls the adhesive tape 20, air is blown through the vent holes 2211 on both sides to keep the adhesive tape 20 horizontal, so that the adhesive tape 20 is positioned flat on the application table 241. In specific implementation, the part of the adhesive pulling component 22 that abuts against the tape 20 is the pressure block 221. The vent 2211 is provided on the pressure block 221. The power source of the adhesive pulling component 22 is a cylinder. The extension and retraction of the cylinder shaft in the vertical direction drives the pressure block 221 to move, so as to clamp and release the tape 20. The extension and retraction of the cylinder shaft in the horizontal direction allows the pressure block 221 to pull the tape 20 intermittently.

[0045] Optionally, such as Figure 2 As shown, the adhesive applicator 2 also includes a detection component 25, which includes a detection switch 251, a swing arm guide roller 252, a first guide roller 253, and a second guide roller 254. The first guide roller 253 and the second guide roller 254 are located on both sides and above the swing arm guide roller 252, respectively. The adhesive pulling component 22 clamps the first end of the adhesive tape 20, causing the tape 20 to pass sequentially through the first guide roller 253, the swing arm guide roller 252, and the second guide roller 254 to the adhesive applicator 241. When the tape 20 is wound on the tape 20 feeding tray 21, one end of the tape 20 is fixed to the tape 20 feeding tray 21, and the other end is fixed to the adhesive applicator 241. The tension between the tapes causes the swing arm guide roller 252 to swing towards the first guide roller 253. When the tape 20 on the tape 20 feeding tray 21 is used up, only one end of the tape 20 is fixed, and the tension between the tapes disappears. The first guide roller 253 above the swing arm guide roller 252 will also be unable to use the tape 20 to swing the swing arm guide roller 252 to one side. At this time, the swing arm guide roller 252 is vertically downward due to gravity. The detection switch 251 can be set at this point, and when the swing arm guide roller 252 is vertical, the detection switch 251 will be triggered, thus triggering a tape depletion alarm.

[0046] In specific implementation, one side of the tape 20 in the thickness direction is the adhesive surface, while the other side is the non-adhesive surface. In this embodiment, the first guide roller 253 and the second guide roller 254 both abut against the non-adhesive surface of the tape 20, while the swing arm guide roller 252 abuts against the adhesive surface of the tape 20. In order to reduce the risk of adhesion between the tape 20 and the swing arm guide roller 252, the outer peripheral surface of the swing arm guide roller 252 is provided with grooves to reduce the contact area between the adhesive surface of the tape 20 and the swing arm guide roller 252.

[0047] Optionally, the detection assembly 25 further includes a first limiting protrusion 255, which is located on the side of the swing arm guide roller 252 near the first guide roller 253, such as... Figure 2 As shown, the first limiting protrusion 255 is located between the swing arm guide roller 252 and the first guide roller 253. The first limiting protrusion 255 limits the angle at which the swing arm guide roller 252 swings toward the first guide roller 253, so as to prevent the pulling speed of the tape 20 by the tape pulling component 22 from being too fast, causing the swing arm guide roller 252 to turn to the horizontal or even to rotate counterclockwise toward the second guide roller 254 after reaching the horizontal position. This would prevent the swing arm guide roller 252 from losing its warning function for the tape 20 being used up, as well as its tensioning function during the pulling process of the tape 20.

[0048] Preferably, the detection component 25 further includes a second limiting protrusion 256, which is located on the side of the swing arm guide roller 252 near the second guide roller 254, such as... Figure 2 As shown, the second limiting protrusion 256 is located between the swing arm guide roller 252 and the second guide roller 254. The second limiting protrusion 256 limits the shortest distance between the swing arm guide roller 252 and the detection switch 251. Therefore, the horizontal position of the second limiting protrusion 256 and the detection switch 251 should be such that the second limiting protrusion 256 is closer to the vertically positioned swing arm guide roller 252, to prevent the swing arm guide roller 252 from impacting the detection switch 251 when it falls back under gravity. The detection switch 251 can be selected without direct contact with moving parts; that is, it can respond when an object approaches the sensing surface of the detection switch 251. A conventional product on the market can be selected for the detection switch 251 according to actual needs.

[0049] Furthermore, such as Figure 3 and Figure 4As shown, the roller coating mechanism 3 includes a roller coating base plate 31 and a roller coating roller 32. The roller coating base plate 31 is provided with an air blowing hole 311. The electrode tab 10 has a first surface and a second surface arranged opposite to each other along its own thickness direction. The first surface of the electrode tab 10 abuts against the roller coating base plate 31. The air blowing hole 311 is used to move the tape 20 that is not attached to the first surface away from the roller coating base plate 31. The roller coating roller 32 rolls back and forth along the length direction perpendicular to the electrode tab 10 so that the tape 20 on both sides perpendicular to the length direction of the electrode tab 10 is attached to the second surface. As can be seen from the above steps, when the electrode tab 10 is on the adhesive application table 241, the first surface of the electrode tab 10 that abuts against the adhesive application table 241 is already attached to the tape 20. The length direction of the electrode tab 10 is perpendicular to the length direction of the tape 20, and in the length direction of the tape 20, both ends of the tape 20 are exposed beyond the electrode tab 10. For example, air can first be blown from the air hole 311 on the left side of the tab 10 onto the tape 20, so that the tape 20 on the left side of the tab 10 moves away from the roller base plate 31. Then, the roller 32 can be rolled from left to right along the length of the tape 20, so that the tape 20 on the left side of the tab 10 is adhered to the second surface of the tab 10. Then, air can be blown from the air hole 311 on the right side of the tab 10 onto the tape 20, so that the tape 20 on the right side of the tab 10 moves away from the roller base plate 31, and the roller 32 can be rolled from right to left along the length of the tape 20, so that the tape 20 on the right side of the tab 10 is adhered to the second surface of the tab 10.

[0050] Preferably, the roller adhesive mechanism 3 further includes a color sensor 33. The color sensor 33 uses its own camera to take pictures of the tab 10 within its field of view. Since the tab 10 and the tape 20 are different colors, the specific color images obtained by the camera are different when the tape 20 is completely pasted on the second surface of the tab 10 and when the tape 20 is not completely pasted on the second surface of the tab 10. This can be used as a basis to determine whether the tape 20 is pasted in place.

[0051] Furthermore, such as Figure 3As shown, the feeding mechanism 4 includes a clamping element 41 and a feeding base 42. The clamping element 41 is used to clamp the electrode 10 from both sides in the thickness direction, and the feeding base 42 is used to move the clamping element 41 toward the welding mechanism 6. The feeding mechanism 4 is the only mechanism that provides transmission power to the electrode 10 during the entire electrode 10 welding process. Its power source is a cylinder. The clamping element 41 is connected to the cylinder in the vertical direction and is connected to the cylinder shaft through a floating joint. The clamping and releasing of the electrode 10 is achieved by extending and retracting the cylinder shaft in the vertical direction. The feeding base 42 uses the extension and retraction of the cylinder shaft in the horizontal direction to intermittently pull the electrode 10, which is fixed relative to the clamping element 41. The feeding mechanism 4 also includes a linear guide rail. The feeding base 42 is slidably mounted on the linear guide rail. The extension and retraction of the cylinder shaft in the horizontal direction allows the feeding base 42 to slide on the linear guide rail. The feeding process of electrode 10 is as follows: after the clamping component 41 clamps the electrode 10, the horizontal cylinder shaft extends and drives the feeding base 42 to slide. After reaching the preset position, it stops. Then the clamping component 41 releases the electrode 10, and the horizontal cylinder shaft drives the feeding base 42 back to the initial position. Then the clamping component 41 clamps the electrode 10 again. This process is repeated to feed the electrode 10.

[0052] Optionally, such as Figure 5 As shown, the cutting mechanism 5 includes an electrode tab cutter 51, a shock absorber 52, and a cutting base 53. The shock absorber 52 is used to press the electrode tab 10 against the cutting base 53, and the electrode tab cutter 51 cuts the fixed electrode tab 10. Through the feeding mechanism 4, the first end of the electrode tab 10 will pass through the cutting mechanism 5 to the welding mechanism 6. When the welding mechanism 6 fixes the first end of the electrode tab 10, the shock absorber 52 will also fix the electrode tab 10 at the corresponding position, so that the electrode tab cutter 51 can perform subsequent cutting operations. The shock absorber 52 includes a fixing part 522 and an elastic part 521. One end of the elastic part 521 is connected to the fixing part 522, and the other end is connected to the drive cylinder. The drive cylinder can drive the shock absorber 52 to move towards the side closer to the electrode tab 10, that is, downward, so that the fixing part 522 presses against the electrode tab 10. The fixing part 522 is made of polyurethane material, while the elastic part 521 can prevent the fixing part 522 from applying too much pressure to the tab 10, thus avoiding damage to the tab 10.

[0053] Optionally, such as Figure 1As shown, the welding mechanism 6 includes an upper welding film 61 and a lower welding film 62. The upper welding film 61 and the lower welding film 62 clamp the first end of the electrode tab 10 and the electrode sheet to weld the overlapping position of the electrode tab 10 and the electrode sheet. The moving direction of the electrode sheet is perpendicular to the conveying direction of the electrode tab 10. The welding mechanism 6 also includes a dust removal component and a welding guide roller. The electrode sheet is conveyed through the welding guide roller. After welding is completed, the lower welding film 62 moves upward to lift the electrode sheet to prevent welding adhesion that would prevent the electrode sheet from being conveyed smoothly. The dust removal component is located below the welding guide roller. Carbon powder will fall during the welding process. To ensure a clean welding environment, the dust removal component is turned on during welding. Preferably, a position sensor is also provided on the side of the lower welding film 62 near the cutting mechanism 5 to detect whether the electrode tab 10 is located at a preset position between the upper welding film 61 and the lower welding film 62, so as to prevent abnormalities in the feeding process of the electrode tab 10 that could cause incomplete welding.

[0054] Optionally, such as Figure 1 As shown, the electrode welding device also includes a welding base 7, which is a double-layer guide rail design. The welding base 7 includes an upper base 71 and a lower base 72. The upper base 71 can slide on the lower base 72. The lower welding film 62 of the welding mechanism 6 is located on the lower base 72, while the feeding mechanism 1, adhesive applicator 2, adhesive roller 3, feeding mechanism 4, and cutting mechanism 5 are all located on the upper base 71. By adjusting the position of the upper base 71 relative to the lower base 72, the length of the exposed electrode sheet of the electrode 10 can be changed. A scale is installed on the upper base 71 to ensure the adjustment accuracy of the exposed length of the electrode 10. A quick-release latch is provided between the upper base 71 and the lower base 72. When it is necessary to replace the electrode cutter 51, the quick-release latch can be opened, increasing the distance between the cutting mechanism 5 and the welding mechanism 6 to provide more operating space.

[0055] In addition, it should be noted that the above-mentioned processes are parallel processes, and the operation cycles of each process will not conflict. Therefore, the longest time required for each of the aforementioned mechanisms to complete its own operation is the time required for the electrode welding device to complete the welding of one electrode 10 to the electrode sheet.

[0056] Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A tab welding apparatus characterized by, The device comprises feeding mechanism (1), adhesive attaching mechanism (2), roller adhesive mechanism (3), feeding mechanism (4), cutting mechanism (5) and welding mechanism (6) arranged in sequence, the tab (10) passes through the feeding mechanism (1), the adhesive attaching mechanism (2), the roller adhesive mechanism (3), the feeding mechanism (4) and the cutting mechanism (5) to the welding mechanism (6), and when the welding mechanism (6) welds the first end of the tab (10) and the pole piece, the cutting mechanism (5) cuts the tab (10); The feeding mechanism (1) comprises a tab feeding disc (11), a weight assembly (12) and a smoothing assembly (13), the weight assembly (12) comprises an upper roller (121) and a weight (122), the weight (122) is slidingly arranged below the upper roller (121), one end of the tab (10) is wound on the tab feeding disc (11), the other end passes through the smoothing assembly (13) and is pulled by the feeding mechanism (4), the middle section of the tab (10) is wound on the weight (122) and the upper roller (121), the feeding mechanism (4) pulls the tab (10) to make the weight (122) close to the upper roller (121), the tab feeding disc (11) releases the tab (10) to make the weight (122) away from the upper roller (121); The adhesive attaching mechanism (2) comprises an adhesive tape feeding disc (21), an adhesive pulling piece (22), an adhesive tape cutter (23) and an adhesive attaching table (241), the adhesive pulling piece (22) is used to pull the first end of the adhesive tape (20) wound on the adhesive tape feeding disc (21) to the adhesive attaching table (241) and below the tab (10), the adhesive tape cutter (23) is located between the adhesive attaching table (241) and the adhesive pulling piece (22), and the adhesive tape cutter (23) is used to cut the adhesive tape (20); The cutting mechanism (5) comprises a tab cutter (51), a shockproof block (52) and a cutting base (53), the shockproof block (52) is used to press the tab (10) on the cutting base (53), and the tab cutter (51) cuts the fixed tab (10); The welding mechanism (6) comprises an upper welding film (61) and a lower welding film (62), the first end of the tab (10) and the pole piece are clamped between the upper welding film (61) and the lower welding film (62) to weld the tab (10) and the pole piece.

2. The tab welding apparatus of claim 1, wherein The gluing mechanism (2) further comprises a detection assembly (25), the detection assembly (25) comprising a detection switch (251), a swing arm guide roller (252), a first passing roller (253) and a second passing roller (254), the first passing roller (253) and the second passing roller (254) being respectively located on both sides of the swing arm guide roller (252) and above the swing arm guide roller (252), the first end of the adhesive tape (20) sequentially passing through the first passing roller (253), the swing arm guide roller (252) and the second passing roller (254) to the glue pulling piece (22), the adhesive tape (20) not passing through the first passing roller (253), the swing arm guide roller (252) triggering the detection switch (251).

3. The tab welding apparatus of claim 2, wherein The detection assembly (25) further comprises a first limiting protrusion (255), the first limiting protrusion (255) being located on the side of the swing arm guide roller (252) close to the first passing roller (253), the first limiting protrusion (255) being used for limiting the angle of the swing arm guide roller (252) swinging to the side of the first passing roller (253).

4. The tab welding apparatus of claim 2, wherein The detection assembly (25) further comprises a second limiting protrusion (256), the second limiting protrusion (256) being located on the side of the swing arm guide roller (252) close to the second passing roller (254), the second limiting protrusion (256) being used for limiting the shortest distance between the swing arm guide roller (252) and the detection switch (251).

5. The tab welding apparatus of claim 1, wherein The roller gluing mechanism (3) comprises a roller gluing bottom plate (31) and a roller gluing roller (32), the roller gluing bottom plate (31) being provided with air blowing holes (311), the tab (10) having a first surface and a second surface oppositely arranged along the thickness direction of the tab (10), the first surface of the tab (10) abutting against the roller gluing bottom plate (31), the air blowing holes (311) being used for making the adhesive tape (20) not adhered to the first surface away from the roller gluing bottom plate (31), the roller gluing roller (32) rolling back and forth along the length direction perpendicular to the tab (10) to make the adhesive tape (20) on both sides of the length direction perpendicular to the tab (10) adhere to the second surface.

6. The tab welding apparatus of claim 5, wherein The roller gluing mechanism (3) further comprises a color sensor (33), the color sensor (33) being used for detecting whether the adhesive tape (20) is adhered to the second surface.

7. The tab welding apparatus of claim 1, wherein The feeding mechanism (4) comprises a pressing piece (41) and a feeding base (42), the pressing piece (41) being used for clamping the tab (10) from both sides of the thickness direction of the tab (10), the feeding base (42) being used for driving the pressing piece (41) to move relative to the welding mechanism (6).

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