Electrode cutting device and cutting method

Abstract

This invention discloses an electrode tab cutting device and its cutting method. The electrode tab cutting device includes an electrode sheet transport device for transporting electrode sheets; a first laser cutting device for cutting the central blank area of ​​the electrode sheet to divide the wide electrode sheet into narrow electrode sheets with tabs already cut out and narrow electrode sheets to be cut; and a second laser cutting device for cutting the tabs on the narrow electrode sheets to be cut. The cutting method includes: cutting the central blank area of ​​the wide electrode sheet using the first laser cutting device to divide it into narrow electrode sheets with tabs already cut out and narrow electrode sheets to be cut; continuing to transport the narrow electrode sheets with tabs already cut out and the narrow electrode sheets to be cut out respectively; cutting the blank area of ​​the narrow electrode sheets to be cut out using the second laser cutting device to divide it into narrow electrode sheets with tabs already cut out and waste material; and transporting the narrow electrode sheets with tabs already cut out and the waste material separately.

Description

Technical Field

[0001] This invention relates to the technical field of lithium battery manufacturing, and in particular to an electrode tab cutting device and its cutting method. Background Technology

[0002] In the lithium-ion battery manufacturing process, laser cutting of electrode tabs is a key step in electrode forming, typically occurring after electrode rolling and slitting, and before winding or stacking. This process involves smoothly conveying continuous positive and negative electrode sheets under constant tension. After alignment and visual positioning, a laser beam is output from a laser source and, through scanning with a galvanometer or in conjunction with a motion platform, non-contact cutting is performed on the pre-defined blank areas of the electrode sheets, thereby producing electrode tab structures that conform to the designed dimensions, quantity, and contours.

[0003] like Figure 1 and Figure 2 As shown, the current laser tab cutting process uses the following approach: The blank areas for the incoming electrode sheet are placed on both sides of the sheet, and correspondingly, the laser cutting device is arranged on both sides of the electrode sheet conveying path according to the distribution of these blank areas. During the cutting process, the laser accompanies the electrode sheet's transport, continuously cutting according to a preset program trajectory. The cut-off portion is considered waste and collected and centrally processed by a waste funnel. After cutting, the electrode sheet needs to be further divided into two by a subsequent slitting device, ultimately becoming two independent products that can flow into the next process. However, this approach has the following drawbacks: 1. Significant waste of raw materials: Since the spacing between the electrodes occupies most of the blank area, the waste area generated during the cutting process is much larger than the effective electrode area formed in the end, resulting in a large waste of raw materials. 2. Complex process and high cost: Since the blank area of ​​the incoming electrode sheet is located on both sides of the electrode sheet, the electrode sheet obtained after laser cutting is still a whole. In order to obtain an independent electrode sheet that meets the final size requirements, an additional slitting device must be arranged after the laser cutting process to cut the electrode sheet from the middle. This increases the complexity of the equipment, occupies space, and increases the cost. 3. Low efficiency in changing models: In order to be compatible with incoming electrode sheets of different widths, laser cutting equipment usually needs to be equipped with a movable adjustment platform. Whenever the product model is changed, the position of the laser cutting equipment on both sides needs to be adjusted to adapt to the new blank area position. This process is time-consuming and affects production efficiency. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art. The primary objective is to provide an electrode cutting device that can reduce waste generation, save changeover time, and simplify production steps. The second objective is to provide a cutting method for a tab cutting device that can reduce waste generation, save changeover time, and simplify production steps.

[0005] The technical solution adopted in this invention is as follows: the electrode tab cutting device includes a base, on which an electrode sheet transport device, a first laser cutting device, and a second laser cutting device are arranged. The electrode sheet transport device is used to transport the electrode sheet. The first laser cutting device is used to cut the middle blank area of ​​the electrode sheet on the electrode sheet transport device to divide the wide electrode sheet into a narrow electrode sheet with the electrode tab already cut out and a narrow electrode sheet to be cut. The second laser cutting device is used to cut the electrode tabs on the narrow electrode sheet to be cut on the electrode sheet transport device.

[0006] Furthermore, the base is provided with a first adsorption device and a second adsorption device, which are respectively corresponding to the first laser cutting device and the second laser cutting device. The first laser cutting device cuts the electrode sheet when the first adsorption device adsorbs the electrode sheet, and the second laser cutting device cuts the electrode sheet when the second adsorption device adsorbs the electrode sheet.

[0007] Furthermore, the first adsorption device includes a first cutting cavity, a second cutting cavity, and a first negative pressure transmission belt. The first cutting cavity and the second cutting cavity are arranged sequentially along the transport direction of the electrode sheet. A first electrode sheet clamping channel is provided between the first negative pressure transmission belt and the first cutting cavity, and between the first negative pressure transmission belt and the second cutting cavity.

[0008] Furthermore, the first cutting cavity includes a first Y-axis moving module and a first X-axis moving module. The first X-axis moving module is located on the moving end of the first Y-axis moving module. A negative pressure cavity is provided on the moving end of the first X-axis moving module. The first negative pressure transmission belt is located on the moving end of the first X-axis moving module and below the negative pressure cavity. The first electrode clamping channel is formed between the first negative pressure transmission belt and the negative pressure cavity.

[0009] Furthermore, the second cutting cavity includes a second Y-axis moving module, and a smoothing roller is provided on the moving end of the second Y-axis moving module. The smoothing roller is disposed opposite to the first negative pressure transmission belt, and the first electrode clamping channel is formed between the first negative pressure transmission belt and the smoothing roller.

[0010] Furthermore, the second adsorption device includes a third Y-axis moving module, a second negative pressure transmission belt, and a third negative pressure transmission belt. A second X-axis moving module is provided on the moving end of the third Y-axis moving module. The second negative pressure transmission belt and the third negative pressure transmission belt are both located on the moving end of the second X-axis moving module. The second negative pressure transmission belt can be connected to the end of the first adsorption device. The third negative pressure transmission belt is located below the second negative pressure transmission belt. A second electrode clamping channel is provided between the second negative pressure transmission belt and the third negative pressure transmission belt.

[0011] Furthermore, the second adsorption device also includes a third cutting cavity, which is correspondingly arranged with the second electrode clamping channel. The third cutting cavity includes a fourth Y-axis moving module, and the moving end of the fourth Y-axis moving module is provided with a third dust suction pipe and a second laser afterglow baffle.

[0012] Furthermore, the second laser cutting device includes a fifth Y-axis moving module, a third X-axis moving module, and a laser support. The third X-axis moving module is located on the moving end of the fifth Y-axis moving module, and the laser support is located on the moving end of the third X-axis moving module. A lower optical module is provided on the laser support.

[0013] Furthermore, the first laser cutting device includes a fourth X-axis moving module and an upper optical module. The fourth X-axis moving module is located on the laser support, and the upper optical module is located on the moving end of the fourth X-axis moving module and above the lower optical module.

[0014] Furthermore, the electrode transport device includes multiple transition rollers, which are distributed at the first adsorption device and the second adsorption device.

[0015] Furthermore, the present invention also provides a cutting method for the aforementioned tab cutting device, characterized in that it includes the following steps: Step S101: The middle blank area of ​​the wide electrode sheet is cut by the first laser cutting device to divide it into narrow electrode sheets with the tabs cut out and narrow electrode sheets to be cut. Step S102: Continue transporting the narrow electrode sheets with the tabs already cut out and the narrow electrode sheets to be cut separately; Step S103: The blank area of ​​the narrow electrode sheet to be cut is cut by the second laser cutting device to separate it into narrow electrode sheets with cut tabs and waste material. Step S104: Transport the narrow electrode sheets with cut tabs and the waste materials separately.

[0016] The beneficial effects of this invention are: In contrast to the shortcomings of existing technologies, this invention reduces the spacing between tabs and further reduces waste by changing the position of the blank area of ​​the incoming electrode sheet and adjusting the cutting position of the laser cutting device from the sides to the center of the electrode sheet. Secondly, after cutting the tabs, two narrow electrode sheets with the tabs cut out can be obtained directly without the need for additional slitting devices, thus simplifying the production process. Furthermore, when the width of the incoming electrode sheet changes, the blank area of ​​the electrode sheet remains in the center, and the cutting position is always in the center of the electrode sheet, allowing the laser cutting device to remain in its original position, saving changeover time. Therefore, the tab cutting device has the advantages of reducing waste, saving changeover time, and simplifying the production process. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention 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 the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0018] Figure 1 This is a three-dimensional structural diagram of an existing electrode cutting device; Figure 2 This is a schematic diagram showing the location of the blank area of ​​the electrode tab in existing technology; Figure 3 This is a three-dimensional structural schematic diagram of the electrode cutting device of the present invention; Figure 4 This is a schematic diagram of the planar structure of the electrode cutting device of the present invention; Figure 5 This is a schematic diagram showing the location of the blank area of ​​the electrode tab in this invention; Figure 6 This is a three-dimensional structural diagram of the first laser cutting device and the second laser cutting device of the electrode cutting apparatus of the present invention. Figure 7 This is a three-dimensional structural diagram of the first cutting cavity of the electrode cutting device of the present invention; Figure 8 This is a three-dimensional structural diagram of the second cutting cavity of the electrode cutting device of the present invention; Figure 9 This is a three-dimensional structural schematic diagram of the second adsorption device of the electrode cutting device of the present invention; Figure 10 This is a three-dimensional structural diagram of the third cutting cavity of the electrode cutting device of the present invention.

[0019] The attached figures are labeled as follows: 1. Base; 2. Electrode transport device; 3. First laser cutting device; 5. Second laser cutting device; 6. First adsorption device; 7. Second adsorption device; 8. First cutting cavity; 9. Second cutting cavity; 10. First negative pressure transmission belt; 11. First electrode clamping channel; 12. First Y-axis moving module; 13. First X-axis moving module; 15. Negative pressure chamber; 16. First dust suction pipe; 17. Second Y-axis moving module; 18. Smoothing roller; 19. Second dust suction pipe; 20. First laser afterglow block 21. Plate; 23. Second negative pressure transmission belt; 24. Third negative pressure transmission belt; 25. Second electrode clamping channel; 26. Waste collection hopper; 27. Third cutting cavity; 28. Fourth Y-axis moving module; 29. ​​Third dust suction pipe; 30. Second laser peripheral light baffle; 31. Fifth Y-axis moving module; 32. Third X-axis moving module; 33. Laser bracket; 35. Lower optical module; 36. Fourth X-axis moving module; 37. Upper optical module; 4. Third Y-axis moving module; 14. Second X-axis moving module; 501, First transition roll; 502, Second transition roll; 503, Third transition roll; 504, Fourth transition roll; 505, Fifth transition roll.

[0020] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0021] 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 a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0022] It should be noted that all directional indications in the embodiments of the present invention, such as up, down, left, right, front, back, clockwise, counterclockwise, etc., are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0023] Furthermore, the use of terms such as "first" and "second" in this invention is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this invention.

[0024] like Figures 3 to 5 As shown, in this embodiment, the electrode tab cutting device includes a base 1, on which an electrode sheet transport device 2, a first laser cutting device 3, and a second laser cutting device 5 are disposed. The electrode sheet transport device 2 is used to transport the electrode sheet. The first laser cutting device 3 is used to cut the middle blank area of ​​the electrode sheet on the electrode sheet transport device 2 to divide the wide electrode sheet into a narrow electrode sheet with the electrode tab cut out and a narrow electrode sheet to be cut. The second laser cutting device 5 is used to cut the electrode tab of the narrow electrode sheet to be cut on the electrode sheet transport device 2.

[0025] The incoming electrode sheet of the present invention is as follows: Figure 5 The wide electrode shown has a coating area distributed on both sides of the wide electrode, while a strip-shaped area without active material is reserved in the middle, extending along the conveying direction. This area is the middle blank area. On this blank area, the outline of the tab to be cut is pre-designed. By cutting along the middle blank area with the first laser cutting device 3, the wide electrode can be directly separated into two independent narrow electrode sheets, and the cut tab can be formed on one of the narrow electrode sheets at the same time.

[0026] In contrast to the shortcomings of existing technologies, in this invention, the incoming electrode sheets are transported via an electrode sheet transport device 2. A first laser cutting device 3 cuts the central blank area of ​​the wide electrode sheet to separate it into narrow electrode sheets with pre-cut tabs and narrow electrode sheets to be cut. The narrow electrode sheets to be cut are then transported via the electrode sheet transport device 2 to a corresponding position where a second laser cutting device 5 cuts the blank area of ​​the narrow electrode sheets to be cut, separating them into narrow electrode sheets with pre-cut tabs and waste material. Therefore, this invention, by changing the position of the blank area of ​​the incoming electrode sheet and adjusting the cutting position of the laser cutting device, transforms the original position... The tabs are moved from both sides to the middle area of ​​the electrode sheet, thereby reducing the spacing between the tabs and further reducing waste. Secondly, after cutting the tabs, two narrow electrode sheets with the tabs cut out can be obtained directly without the need for additional slitting equipment, thus simplifying the production process. In addition, when the width of the incoming electrode sheet changes, the cutting position is always in the middle of the electrode sheet because the blank area of ​​the electrode sheet is always in the middle position. This allows the laser cutting device to remain in its original position, saving changeover time. Therefore, the tab cutting device has the advantages of reducing waste, saving changeover time, and simplifying the production process.

[0027] like Figure 3 As shown, in some embodiments, the base 1 is provided with a first adsorption device 6 and a second adsorption device 7. The first adsorption device 6 and the second adsorption device 7 are respectively corresponding to the first laser cutting device 3 and the second laser cutting device 5. The first laser cutting device 3 cuts the electrode sheet when the first adsorption device 6 adsorbs the electrode sheet, and the second laser cutting device 5 cuts the electrode sheet when the second adsorption device 7 adsorbs the electrode sheet. The first adsorption device 6 is located above the second adsorption device 7. Specifically, during the cutting process, the electrode sheet is adsorbed by the first adsorption device 6 and the second adsorption device 7, which can prevent the vibration of the electrode sheet from affecting the stability of the cutting process.

[0028] like Figure 2 , Figure 7 and Figure 8 As shown, in some embodiments, the first adsorption device 6 includes a first cutting cavity 8, a second cutting cavity 9, and a first negative pressure transmission belt 10. The first cutting cavity 8 and the second cutting cavity 9 are arranged sequentially along the transport direction of the electrode sheet. A first electrode sheet clamping channel 11 is provided between the first negative pressure transmission belt 10 and the first cutting cavity 8, and between the first negative pressure transmission belt 10 and the second cutting cavity 9. Specifically, the electrode sheet is adsorbed, pressed, and transported in the first electrode sheet clamping channel 11, and the electrode sheet is driven to move in the transport direction by the transmission of the first negative pressure transmission belt 10.

[0029] like Figure 7 As shown, in some embodiments, the first cutting cavity 8 includes a first Y-axis moving module 12 and a first X-axis moving module 13. The first X-axis moving module 13 is located on the moving end of the first Y-axis moving module 12. A negative pressure cavity 15 is provided on the moving end of the first X-axis moving module 13. The first negative pressure transmission belt 10 is located on the moving end of the first X-axis moving module 13 and below the negative pressure cavity 15. The first electrode clamping channel 11 is formed between the first negative pressure transmission belt 10 and the negative pressure cavity 15. A first dust suction pipe 16 is also connected to the moving end of the first X-axis moving module 13. Specifically, the first Y-axis moving module 12 and the first X-axis moving module 13 are both for initial adjustment. The negative pressure cavity 15 and the first negative pressure transmission belt 10 located on opposite sides can both adsorb the electrode through negative pressure, so that the adsorption force on opposite sides can adsorb and press the electrode to ensure that the electrode does not shake during cutting. In addition, the first dust suction pipe 16 can suck away the dust generated during cutting.

[0030] It should be noted that the first negative pressure transmission belt 10 may include a negative pressure cavity, a transmission belt, and a guide plate. Both the transmission belt and the guide plate are disposed on the negative pressure cavity. The surface of the transmission belt has multiple adsorption holes communicating with the negative pressure cavity. The guide plate can ensure that the electrode does not fold when it turns at the transition roller of the electrode transport device 2 after being separated from the first negative pressure transmission belt 10. Secondly, the first Y-axis moving module 12 may include a drive motor. The drive end of the drive motor is connected to the lead screw assembly. A slider is connected to the lead screw assembly. The slider moves on the Y-axis when driven by the drive motor to realize the position adjustment of the first X-axis moving module 13 on the Y-axis. The specific structure of the first X-axis moving module 13 and the moving module described below can be referred to the first Y-axis moving module 12, and will not be repeated here. In addition, the first dust suction pipe 16 is connected to the negative pressure source to realize the negative pressure dust suction of the first dust suction pipe 16.

[0031] like Figure 8As shown, in some embodiments, the second cutting cavity 9 includes a second Y-axis moving module 17. A smoothing roller 18 is provided on the moving end of the second Y-axis moving module 17. The smoothing roller 18 is disposed opposite to the first negative pressure transmission belt 10. The first electrode clamping channel 11 is formed between the first negative pressure transmission belt 10 and the smoothing roller 18. A second dust suction pipe 19 and a first laser afterglow baffle 20 are also provided on the moving end of the second Y-axis moving module 17. The second Y-axis moving module 17 is mounted on the base 1. Specifically, when the electrode is transported in the first electrode clamping channel 11, it is pressed together by the negative pressure chamber 15 and the smoothing roller 18, so that the electrode can be stably transported on the first negative pressure transmission belt 10. Secondly, the dust generated during cutting can be sucked away by the second dust suction pipe 19, and the first laser afterglow baffle 20 can block the laser afterglow during cutting. In addition, the position of the second dust suction pipe 19 and the smoothing roller 18 can be adjusted to the cutting area of ​​the first laser cutting device 3 by the second Y-axis moving module 17 to cooperate with the cutting action.

[0032] like Figure 9 As shown, in some embodiments, the second adsorption device 7 includes a third Y-axis moving module 4, a second negative pressure transmission belt 21, and a third negative pressure transmission belt 23. A second X-axis moving module 14 is disposed on the moving end of the third Y-axis moving module 4. The second negative pressure transmission belt 21 and the third negative pressure transmission belt 23 are both located on the moving end of the second X-axis moving module 14. The second negative pressure transmission belt 21 can be connected to the end of the first adsorption device 6. The third negative pressure transmission belt 23 is located below the second negative pressure transmission belt 21. A second electrode clamping channel 25 is disposed between the second negative pressure transmission belt 21 and the third negative pressure transmission belt 23. A waste collection hopper 26 is disposed below the end of the third negative pressure transmission belt 23. The specific structure of the second negative pressure transmission belt 21 and the third negative pressure transmission belt 23 can be referred to the first negative pressure transmission belt 10, and will not be described again here. Specifically, the second negative pressure conveyor belt 21 is used to receive the narrow electrode sheet to be cut, so that the narrow electrode sheet to be cut can continue to be transported in the second electrode sheet clamping channel 25; secondly, the electrode sheet is pressed and transported by the second negative pressure conveyor belt 21 and the third negative pressure conveyor belt 23 located on opposite sides, which can ensure the stability of the electrode sheet during cutting; after cutting, the narrow electrode sheet with the tab cut out and the waste are separated at the end of the third negative pressure conveyor belt 23. The narrow electrode sheet with the tab cut out flows to the next process mechanism through the electrode sheet transport device 2, and the waste is separated from the non-adsorption area at the end of the third negative pressure conveyor belt 23 by gravity and falls into the waste collection hopper 26 for collection.

[0033] like Figure 10As shown, in some embodiments, the second adsorption device 7 further includes a third cutting cavity 27, which is correspondingly arranged with the second electrode clamping channel 25. The third cutting cavity 27 includes a fourth Y-axis moving module 28, and the moving end of the fourth Y-axis moving module 28 is provided with a third dust suction pipe 29 and a second laser afterglow baffle 30. Specifically, the third dust suction pipe 29 can suck away the dust generated during cutting, and the second laser afterglow baffle 30 can block the laser afterglow during cutting. In addition, the fourth Y-axis moving module 28 can adjust the position of the third dust suction pipe 29 and the second laser afterglow baffle 30 to the cutting area of ​​the second laser cutting device 5 to cooperate with the cutting action.

[0034] like Figure 6 As shown, in some embodiments, the second laser cutting device 5 includes a fifth Y-axis moving module 31, a third X-axis moving module 32, and a laser support 33. The third X-axis moving module 32 is located on the moving end of the fifth Y-axis moving module 31, and the laser support 33 is located on the moving end of the third X-axis moving module 32. A lower optical module 35 is disposed on the laser support 33. The fifth Y-axis moving module 31 is mounted on the base 1. Specifically, during the first use of the device, only the fifth Y-axis moving module 31 is needed for Y-axis adjustment. After positioning, subsequent uses do not require Y-axis adjustment; instead, X-axis adjustment is performed via the third X-axis moving module 32 to ensure that the upper optical module 37 and the lower optical module 35 are in the correct positions.

[0035] like Figure 6 As shown, in some embodiments, the first laser cutting device 3 includes a fourth X-axis moving module 36 and an upper optical module 37. The fourth X-axis moving module 36 is located on the laser support 33, and the upper optical module 37 is located on the moving end of the fourth X-axis moving module 36 and above the lower optical module 35. Specifically, the position of the upper optical module 37 on the X-axis can be adjusted independently by the fourth X-axis moving module 36; secondly, by arranging the upper optical module 37 and the lower optical module 35 vertically, the upper optical module 37 and the lower optical module 35 can be respectively positioned above and below the electrode, which can adapt to the cutting action of the middle blank area of ​​the electrode.

[0036] It should be noted that the specific structure of the upper optical module 37 and the lower optical module 35 may include a laser cutting head and a galvanometer scanning system. Since the improvement of this invention does not involve the specific structure of the upper optical module 37 and the lower optical module 35, it will not be described in detail here.

[0037] like Figure 4As shown, in some embodiments, the electrode transport device 2 includes multiple transition rollers distributed at the first adsorption device 6 and the second adsorption device 7. These transition rollers change the transport direction of the electrode but do not provide any driving force for pulling the electrode. Specifically, the multiple transition rollers include a first transition roller 501, a second transition roller 502, a third transition roller 503, a fourth transition roller 504, and a fifth transition roller 505. The first transition roller 501 is located at the beginning of the first cutting cavity 8, and the electrode enters the first cutting cavity 8 after passing through it. The second transition roller 502 is located at the end of the second cutting cavity 9, and the narrow electrode with tabs cut by the first laser cutting device 3 passes through the second transition roller 502 and is directly sent to the next process mechanism. The third transition roller 503 is located between the end of the second cutting cavity 9 and the second adsorption device 7. The narrow electrode sheet to be cut by the first laser cutting device 3 enters the second adsorption device 7 through the third transition roller 503; the fourth transition roller 504 and the fifth transition roller 505 are both located at the end of the second adsorption device 7. The narrow electrode sheet with the cut tabs cut by the second laser cutting device 5 passes through the fourth transition roller 504 and the fifth transition roller 505 in sequence and is directly sent to the next process mechanism. At the same time, the cut waste material moves downward with the third negative pressure conveyor belt 23 of the second adsorption device 7 until the waste material moves to the part without negative pressure and falls into the waste collection hopper 26 for collection.

[0038] The working process of the tab cutting device is as follows: The incoming electrode sheet passes through the first transition roller 501 and enters the first electrode sheet clamping channel 11 located between the first cutting cavity 8 and the first negative pressure transmission belt 10. The electrode sheet is attracted by the negative pressure of the first cutting cavity 8 and the first negative pressure transmission belt 10, and the electrode sheet is further transported by the first negative pressure transmission belt 10. Further, the electrode sheet is transported to the first electrode sheet clamping channel 11 located between the second cutting cavity 9 and the first negative pressure transmission belt 10. The electrode sheet is attracted by the negative pressure of the first negative pressure transmission belt 10, and the electrode sheet is flattened by the smoothing roller 18 of the second cutting cavity 9 to ensure stable cutting by the first laser cutting device 3. After the first laser cutting device 3 cuts the electrode sheet, the narrow electrode sheet divided into one with cut tabs and the narrow electrode sheet to be cut continues to be conveyed through the first negative pressure conveyor belt 10, and the path is separated at the second transition roller 502. Specifically, after the narrow electrode sheet with cut tabs is separated from the first negative pressure conveyor belt 10, it turns at the second transition roller 502 and is directly sent to the next process mechanism; at the same time, the narrow electrode sheet to be cut without cut tabs is conveyed downward to the third transition roller 503 under the action of gravity after it is separated from the first negative pressure conveyor belt 10. After passing through the third transition roller 503, the narrow electrode sheet to be cut is conveyed to the second negative pressure transmission belt 21 for negative pressure adsorption and horizontal conveying. At this time, the narrow electrode sheet to be cut is conveyed in the second electrode sheet clamping channel 25 between the second negative pressure transmission belt 21 and the third negative pressure transmission belt 23, so that the negative pressure of the second negative pressure transmission belt 21 and the third negative pressure transmission belt 23 can adsorb the narrow electrode sheet to be cut from the opposite sides to ensure the stability during cutting. The narrow electrode sheet to be cut is then transported to the cutting area, and the third cutting cavity 27 is correspondingly set in the cutting area. After the second laser cutting device 5 cuts the tabs of the narrow electrode sheet to be cut, the narrow electrode sheet with the cut tabs and the waste material are continued to be transported. Specifically, the narrow electrode sheet with the cut tabs is transported by the third negative pressure conveyor belt 23. After being separated from the third negative pressure conveyor belt 23, it passes through the fourth transition roller 504 and the fifth transition roller 505 in sequence and is transported to the next process mechanism. At the same time, the waste material is transported by the third negative pressure conveyor belt 23. When it moves to the end of the negative pressure-free area, it falls off the end of the third negative pressure conveyor belt 23 by gravity and falls into the waste collection hopper 26 below, completing the centralized collection of waste material.

[0039] Furthermore, the present invention also provides a cutting method for the aforementioned tab cutting device, characterized in that it includes the following steps: Step S101: The middle blank area of ​​the wide electrode sheet is cut by the first laser cutting device 3 to divide it into narrow electrode sheets with cut tabs and narrow electrode sheets to be cut. Step S102: Continue transporting the narrow electrode sheets with the tabs already cut out and the narrow electrode sheets to be cut separately; Step S103: The blank area of ​​the narrow electrode sheet to be cut is cut by the second laser cutting device 5 to separate it into narrow electrode sheets with cut-out tabs and waste material. Step S104: Transport the narrow electrode sheets with cut tabs and the waste materials separately.

[0040] Specifically, this cutting method reduces the spacing between the tabs by changing the position of the blank area of ​​the incoming electrode sheet and adjusting the cutting position of the laser cutting device from the sides of the electrode sheet to the middle area, thereby reducing waste. Secondly, after cutting the tabs, two narrow electrode sheets with the tabs cut out can be obtained directly without the need for additional slitting devices, simplifying the production process. Furthermore, when the width of the incoming electrode sheet changes, the cutting position remains in the middle of the electrode sheet because the blank area is always in the middle, allowing the laser cutting device to remain in its original position and saving changeover time.

[0041] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A tab cutting device, characterized in that: It includes a base (1), on which an electrode transport device (2), a first laser cutting device (3), and a second laser cutting device (5) are provided. The electrode transport device (2) is used to transport the electrode. The first laser cutting device (3) is used to cut the middle blank area of ​​the electrode on the electrode transport device (2) to divide the wide electrode into a narrow electrode with the tab cut out and a narrow electrode to be cut. The second laser cutting device (5) is used to cut the tab of the narrow electrode to be cut on the electrode transport device (2).

2. The electrode cutting device according to claim 1, characterized in that: The base (1) is provided with a first adsorption device (6) and a second adsorption device (7). The first adsorption device (6) and the second adsorption device (7) are respectively provided with the first laser cutting device (3) and the second laser cutting device (5). The first laser cutting device (3) cuts the electrode when the first adsorption device (6) adsorbs the electrode, and the second laser cutting device (5) cuts the electrode when the second adsorption device (7) adsorbs the electrode.

3. The electrode cutting device according to claim 2, characterized in that: The first adsorption device (6) includes a first cutting cavity (8), a second cutting cavity (9) and a first negative pressure transmission belt (10). The first cutting cavity (8) and the second cutting cavity (9) are arranged sequentially along the transport direction of the electrode. A first electrode clamping channel (11) is provided between the first negative pressure transmission belt (10) and the first cutting cavity (8) and between the first negative pressure transmission belt (10) and the second cutting cavity (9).

4. The electrode cutting device according to claim 3, characterized in that: The first cutting cavity (8) includes a first Y-axis moving module (12) and a first X-axis moving module (13). The first X-axis moving module (13) is located on the moving end of the first Y-axis moving module (12). A negative pressure cavity (15) is provided on the moving end of the first X-axis moving module (13). The first negative pressure transmission belt (10) is located on the moving end of the first X-axis moving module (13) and below the negative pressure cavity (15). The first electrode clamping channel (11) is formed between the first negative pressure transmission belt (10) and the negative pressure cavity (15).

5. The electrode cutting device according to claim 3, characterized in that: The second cutting cavity (9) includes a second Y-axis moving module (17), and a smoothing roller (18) is provided on the moving end of the second Y-axis moving module (17). The smoothing roller (18) is disposed opposite to the first negative pressure transmission belt (10), and the first electrode clamping channel (11) is formed between the first negative pressure transmission belt (10) and the smoothing roller (18).

6. The tab cutting device according to claim 2, characterized in that: The second adsorption device (7) includes a third Y-axis moving module (4), a second negative pressure transmission belt (21) and a third negative pressure transmission belt (23). A second X-axis moving module (14) is provided on the moving end of the third Y-axis moving module (4). The second negative pressure transmission belt (21) and the third negative pressure transmission belt (23) are both located on the moving end of the second X-axis moving module (14). The second negative pressure transmission belt (21) can be connected to the end of the first adsorption device (6). The third negative pressure transmission belt (23) is located below the second negative pressure transmission belt (21). A second electrode clamping channel (25) is provided between the second negative pressure transmission belt (21) and the third negative pressure transmission belt (23).

7. The tab cutting device according to claim 6, characterized in that: The second adsorption device (7) further includes a third cutting cavity (27), which is correspondingly arranged with the second electrode clamping channel (25). The third cutting cavity (27) includes a fourth Y-axis moving module (28), and the moving end of the fourth Y-axis moving module (28) is provided with a third dust suction pipe (29) and a second laser peripheral light baffle (30).

8. The electrode cutting device according to claim 1, characterized in that: The second laser cutting device (5) includes a fifth Y-axis moving module (31), a third X-axis moving module (32), and a laser support (33). The third X-axis moving module (32) is located on the moving end of the fifth Y-axis moving module (31), and the laser support (33) is located on the moving end of the third X-axis moving module (32). A lower optical module (35) is provided on the laser support (33).

9. The electrode cutting device according to claim 8, characterized in that: The first laser cutting device (3) includes a fourth X-axis moving module (36) and an upper optical module (37). The fourth X-axis moving module (36) is located on the laser support (33), and the upper optical module (37) is located on the moving end of the fourth X-axis moving module (36) and above the lower optical module (35).

10. The electrode cutting device according to claim 2, characterized in that: The electrode transport device (2) includes multiple transition rollers, which are distributed at the first adsorption device (6) and the second adsorption device (7).

11. A cutting method for the tab cutting device as described in any one of claims 1-10, characterized in that: It includes the following steps: Step S101: The middle blank area of ​​the wide electrode sheet is cut by the first laser cutting device (3) to divide it into a narrow electrode sheet with the electrode tabs cut out and a narrow electrode sheet to be cut. Step S102: Continue transporting the narrow electrode sheets with the tabs already cut out and the narrow electrode sheets to be cut separately; Step S103: The blank area of ​​the narrow electrode sheet to be cut is cut by the second laser cutting device (5) to divide it into narrow electrode sheets with cut-out tabs and waste material. Step S104: Transport the narrow electrode sheets with cut tabs and the waste materials separately.

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