Battery tab die cutting equipment

Abstract

The utility model provides battery tab die cutting equipment, which is used for cutting tabs on a pole piece and comprises a laser head, an adsorption device and a driving device, the laser head emits laser to cut a pole lug on the pole piece; the adsorption device is arranged relative to the laser emission direction, the adsorption device comprises a first negative pressure adsorption assembly and a second negative pressure adsorption assembly which are used for adsorbing pole pieces, and a laser irradiation area used for allowing laser to penetrate through is arranged between the first negative pressure adsorption assembly and the second negative pressure adsorption assembly; the driving device is used for pulling the pole piece to pass through the laser irradiation area; the first negative pressure adsorption assembly is communicated with the second negative pressure adsorption assembly; the technical problems that finished products subjected to die cutting have leftover materials and tabs are special-shaped can be solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery processing technical field, concretely relates to a battery tab die cutting equipment. BACKGROUND

[0002] With the rapid development of new energy industry, the continuous improvement of battery technology, there is higher requirement to battery capacity and output at present.

[0003] In the processing of battery, one of the processes is laser die cutting positive and negative pole lug, when speeding up processing, the finished product after die cutting has the quality problem of edge corner material and pole lug special shape, which becomes a bottleneck of electrode segment output manufacturing. SUMMARY

[0004] The utility model provides a kind of battery tab die cutting equipment to improve the technical problem that finished product after die cutting has edge corner material and pole lug special shape.

[0005] To achieve the above object and other related purposes, the utility model provides a kind of battery tab die cutting equipment for cutting out pole lug on pole piece, including laser head, suction device and drive device;Laser head emits laser and cuts out pole lug on pole piece;Suction device is set relative to the direction of laser emission, and suction device includes first negative pressure suction component and second negative pressure suction component for suctioning pole piece, and first negative pressure suction component and second negative pressure suction component are provided with laser irradiation area for laser passing between them;Drive device is used to drag pole piece through laser irradiation area;First negative pressure suction component and second negative pressure suction component are communicated.

[0006] In the utility model battery tab die cutting equipment one example, first negative pressure suction component includes first negative pressure cavity and first suction plate set on the opening of first negative pressure cavity, second negative pressure suction component includes second negative pressure cavity and second suction plate set on the opening of second negative pressure cavity, first negative pressure cavity and second negative pressure cavity are communicated by ventilation pipeline, and vacuum generating device is connected to first negative pressure cavity or second negative pressure cavity.

[0007] In the utility model battery tab die cutting equipment one example, second negative pressure suction component is located between first negative pressure suction component and drive device, first suction plate and second suction plate are vertically arranged, and the suction surface of first suction plate and the suction surface of second suction plate are coplanar.

[0008] In the utility model battery tab die cutting equipment one example, second suction plate includes flat portion and special-shaped portion, flat portion is close to drive device, special-shaped portion is connected to flat portion and extends to the direction of first negative pressure suction component, and the outer contour of special-shaped portion can avoid the moving track of laser.

[0009] In the battery tab die cutting equipment example of the utility model, the driving device includes a roller and a compression roller for compressing the pole piece to the roller, and the roller is connected with a power source outside for rotation.

[0010] In the battery tab die cutting equipment example of the utility model, the extension surface of the adsorption surface of the second adsorption plate passes through the tangent of the roller and the pole piece.

[0011] In the battery tab die cutting equipment example of the utility model, the waste recovery device is arranged after the second negative pressure adsorption assembly of the pole piece and is used for collecting the waste cut.

[0012] In the battery tab die cutting equipment example of the utility model, the waste recovery device includes a conveying belt and multiple rollers, all the rollers are drivingly connected with the roller through the conveying belt, the conveying belt is provided with adsorption holes, a third negative pressure cavity is arranged in the area surrounded by the conveying belt, and the third negative pressure cavity adsorbs the waste cut through the adsorption holes.

[0013] In the battery tab die cutting equipment example of the utility model, the multiple rollers include a first roller arranged on the side, away from the adsorption device, of the roller, the part of the conveying belt between the roller and the first roller is a first adsorption area, the first adsorption area has an included angle of 0-20 DEG with the discharge direction of the pole piece, and the third negative pressure cavity covers the first adsorption area.

[0014] In the battery tab die cutting equipment example of the utility model, the multiple rollers further include a second roller arranged on the side, away from the roller, of the first roller, the part of the conveying belt between the second roller and the first roller is a second adsorption area, the second adsorption area has an included angle of 20-85 DEG with the discharge direction of the pole piece, and the third negative pressure cavity covers the second adsorption area.

[0015] The battery tab die cutting equipment of the utility model can fix the pole piece to be processed by the adsorption device, so that the pole piece can be fixed at the position of laser irradiation of the laser head. The pole piece is fed to the laser cutting area by the driving device, and is discharged after laser die cutting. The adsorption device in the technical scheme is provided with a first negative pressure adsorption assembly and a second negative pressure adsorption assembly, and a laser irradiation area for laser penetration is arranged between the first negative pressure adsorption assembly and the second negative pressure adsorption assembly, so that the pole piece can be adsorbed and fixed by the first negative pressure adsorption assembly and the second negative pressure adsorption assembly simultaneously during laser cutting, and the first negative pressure adsorption assembly and the second negative pressure adsorption assembly are respectively located on the two sides of the pole piece cutting position. The setting can improve the stability of the pole piece during processing, reduce shaking, and improve the quality of laser cutting.

[0016] In addition, the first negative pressure adsorption assembly and the second negative pressure adsorption assembly are communicated, so that the first negative pressure adsorption assembly and the second negative pressure adsorption assembly have the same negative pressure, and then the same adsorption force is exerted on the pole piece, the stability of the pole piece in the processing process is further improved, the laser defocusing problem caused by the shaking of the pole piece is improved, the laser cutting quality is further improved, and the technical problems of the finished product with edge corners and the pole ear of an irregular shape after die cutting are improved. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other embodiments can be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0018] Figure 1 It is a structural schematic view of an embodiment of the battery pole ear die cutting equipment of the present application.

[0019] Figure 2 It is a working schematic view of the adsorption device in an embodiment of the battery pole ear die cutting equipment of the present application.

[0020] Figure 3 It is a sectional view of the adsorption device in an embodiment of the battery pole ear die cutting equipment of the present application.

[0021] Figure 4 It is a left view of the adsorption device in an embodiment of the battery pole ear die cutting equipment of the present application.

[0022] Figure 5 It is Figure 1 It is a local enlarged view of A in FIG. 4.

[0023] Element number explanation:

[0024] 100, laser head; 200, adsorption device; 210, first negative pressure adsorption assembly; 211, first negative pressure cavity; 212, first adsorption plate; 220, second negative pressure adsorption assembly; 221, second negative pressure cavity; 222, second adsorption plate; 2221, flat part; 2222, special-shaped part; 230, air duct; 240, vacuum generating device; 300, driving device; 310, passing roller; 320, pressing roller; 400, waste recovery device; 410, conveying belt; 420, first roller; 430, first adsorption area; 440, second roller; 450, second adsorption area; 500, pole piece. DETAILED DESCRIPTION

[0025] The following embodiments of the present application will be described in detail by specific examples. Those skilled in the art can easily understand other advantages and functions of the present application from the contents disclosed in the specification. The present application can also be implemented or applied by different specific embodiments, and various modifications or changes can be made to the details in the specification without departing from the spirit of the present application. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict. It should also be understood that the terms used in the embodiments of the present application are for describing specific specific embodiments, and are not intended to limit the protection scope of the present application. The test methods in the following embodiments are not specified, and are usually performed according to conventional conditions or conditions recommended by manufacturers.

[0026] When the embodiments give a numerical range, it should be understood that, unless otherwise stated by the present application, each numerical range and any numerical value between the two endpoints can be selected. Unless otherwise defined, all technical and scientific terms used in the present application are consistent with the understanding of the prior art by those skilled in the art and the description of the present application. Any method, device and material of the prior art similar or equivalent to the method, device and material in the embodiments of the present application can be used to realize the present application.

[0027] It should be understood that the terms such as "up", "down", "left", "right", "middle" and "one" in the specification are only for the convenience of clear description, and are not intended to limit the scope of the present application. The change or adjustment of the relative relationship is also regarded as the scope of the present application without substantial change of the technical content.

[0028] Please refer to Figures 1 to 5 The present application provides a battery tab die cutting equipment for cutting tabs on the pole piece 500, comprising a laser head 100, a suction device 200 and a driving device 300. The setting can improve the stability of the pole piece 500 in the processing process, so as to reduce the shaking, and then improve the laser defocusing problem caused by the shaking of the pole piece 500, so as to realize the improvement of the laser cutting quality, and improve the technical problems of the finished product with edge corners and tab special shape after die cutting.

[0029] Please refer to Figure 1 The laser head 100 is used as a cutting tool, and the tabs are cut on the pole piece 500 by emitting laser; in order to ensure that the tabs meet the design requirements, the working state and parameter setting of the laser head 100 are strictly debugged and optimized. The laser head 100 is not the main improvement point of the present application, and can be obtained by commercial means. The specific structure of the laser head 100 is not described.

[0030] Please refer to Figures 2 to 4, the adsorption device 200 is arranged relative to the direction of laser emission, and the adsorption device 200 is responsible for firmly adsorbing and fixing the pole piece 500 during the cutting process, and ensures that the pole piece 500 maintains the correct position and direction under the irradiation of the laser. In order to achieve the above purpose, in the embodiment, the adsorption device 200 includes a first negative pressure adsorption assembly 210 and a second negative pressure adsorption assembly 220 for adsorbing the pole piece 500, and a laser irradiation area for laser passing through is arranged between the first negative pressure adsorption assembly 210 and the second negative pressure adsorption assembly 220. This design enables the laser to pass through unobstructed during the cutting process, thereby avoiding the problem of inaccurate cutting or cutting failure caused by the obstruction of the adsorption device 200. At the same time, the first negative pressure adsorption assembly 210 and the second negative pressure adsorption assembly 220 are respectively located on both sides of the cutting position of the pole piece 500. This arrangement can improve the stability of the pole piece 500 during processing to reduce shaking, thereby improving the quality of laser cutting.

[0031] Please refer to Figure 1 and Figure 5 The driving device 300 is arranged downstream of the adsorption device 200 and is used to pull the pole piece 500 through the laser irradiation area. It should be noted that during the cutting process, the area to be processed of the pole piece 500 is located in the laser irradiation area, and after the cutting is completed, the pole piece 500 needs to be timely and accurately pulled out of the laser irradiation area. The driving device 300 can pull the pole piece 500 to realize continuous cutting through precise control and driving, thereby improving the automation degree and efficiency of the entire die cutting process.

[0032] Please refer to Figure 3 and Figure 4 In the embodiment, the first negative pressure adsorption assembly 210 and the second negative pressure adsorption assembly 220 are communicated. The first negative pressure adsorption assembly 210 and the second negative pressure adsorption assembly 220 can have the same negative pressure, thereby realizing the same adsorption force on the pole piece 500, further improving the stability of the pole piece 500 during processing, and further improving the problem of laser defocusing caused by shaking of the pole piece 500, which can further improve the quality of laser cutting and improve the technical problems of the finished product after die cutting, such as edge corners and tab irregularities.

[0033] Please refer to Figure 3 and Figure 4In the battery tab die-cutting equipment example, the first negative pressure adsorption assembly 210 includes a first negative pressure cavity 211 and a first adsorption plate 212 arranged on the opening of the first negative pressure cavity 211. The material of the first negative pressure cavity 211 is not limited, which can be aluminum alloy or stainless steel, etc., the shape and size of the first negative pressure cavity 211 are not limited, which can be a cuboid, a cylinder or other irregular shapes, and adaptive design can be carried out according to the preset pressure requirement and installation space. The connection mode of the first adsorption plate 212 and the opening of the first negative pressure cavity 211 is not limited, which can be detachable threaded connection, or welding and fixing, etc., as long as the sealing connection of the first adsorption plate 212 and the opening of the first negative pressure cavity 211 can be realized. Preferably, a sealing structure is arranged at the connection to ensure the air tightness of the first negative pressure adsorption assembly 210. In the embodiment, the first negative pressure cavity 211 is a cuboid cavity made of stainless steel, and the holes on the first adsorption plate 212 are arranged in a horizontal and vertical array.

[0034] Please refer to Figure 3 and Figure 5 , the second negative pressure adsorption assembly 220 includes a second negative pressure cavity 221 and a second adsorption plate 222 arranged on the opening of the second negative pressure cavity 221. The material of the second negative pressure cavity 221 is not limited, which can be aluminum alloy or stainless steel, etc., the shape and size of the second negative pressure cavity 221 are not limited, which can be a cuboid, a cylinder or other irregular shapes, and adaptive design can be carried out according to the preset pressure requirement and installation space. The connection mode of the second adsorption plate 222 and the opening of the second negative pressure cavity 221 is not limited, which can be detachable threaded connection, or welding and fixing, etc., as long as the sealing connection of the second adsorption plate 222 and the opening of the second negative pressure cavity 221 can be realized. Preferably, a sealing structure is arranged at the connection to ensure the air tightness of the second negative pressure adsorption assembly 220. In the embodiment, the second negative pressure cavity 221 is made of stainless steel, and the shape of the second negative pressure cavity 221 is a prism with irregular side surfaces, so as to realize the optimal utilization within the existing space range. The first adsorption plate 212 is a cuboid, and the holes on the first adsorption plate 212 are arranged in a horizontal and vertical array. Preferably, the diameter of the second adsorption plate 222 is smaller than that of the first adsorption plate 212, and the spacing between the holes is also smaller. Since the tab 500 adsorbed by the first adsorption plate 212 is not processed, and the tab 500 adsorbed by the second adsorption plate 222 is a tab with a gap after cutting, the diameter of the hole of the second adsorption plate 222 is smaller than that of the hole of the first adsorption plate 212, which on the one hand considers that the area of the first adsorption plate 212 is smaller, and the smaller diameter of the hole can improve the uniformity and stability of the adsorption force; on the other hand, it can reduce the probability of adsorption to the gap to prevent the adsorption effect from being affected by air leakage.

[0035] Please refer to Figure 3 and Figure 4The first negative pressure cavity 211 and the second negative pressure cavity 221 are communicated through a ventilation pipeline 230. The ventilation pipeline 230 can be flexible or rigid, and is not limited, and the ventilation pipeline 230 in the embodiment is a stainless steel rigid member. The first negative pressure cavity 211 or the second negative pressure cavity 221 is externally connected with a vacuum generating device 240. The vacuum generating device 240 can be selected in various ways, such as a vacuum pump or a pneumatic element capable of achieving negative pressure. The technical solution can realize that the first negative pressure cavity 211 and the second negative pressure cavity 221 share a vacuum source, and only two vacuum generating devices 240 are needed on one of them, which simplifies the structure, reduces the cost, and also enables the first negative pressure cavity 211 and the second negative pressure cavity 221 to have relatively close adsorption force, improves the stability of adsorption, reduces the displacement of the pole piece 500, and further improves the laser defocusing problem caused by the shaking of the pole piece 500, which can further improve the laser cutting quality and improve the technical problems of the finished product after die cutting, such as the existence of edge corners and abnormal polar ears.

[0036] Please refer to Figure 1 In the battery tab die cutting equipment example, the second negative pressure adsorption assembly 220 is located between the first negative pressure adsorption assembly 210 and the driving device 300, and the first adsorption plate 212 and the second adsorption plate 222 are both vertically arranged. The second negative pressure adsorption assembly 220 and the first negative pressure adsorption assembly 210 can be arranged along the moving direction of the pole piece 500, and can adsorb both ends of the pole piece 500 to be processed, respectively. Compared with the case without the second adsorption plate 222, this arrangement has a more stable fixing effect, which is beneficial to improve the laser cutting quality. Further, the adsorption surface of the first adsorption plate 212 and the adsorption surface of the second adsorption plate 222 are coplanar. On the one hand, this arrangement can improve the perpendicularity of the cutting plane of the pole piece 500 to the laser, and on the other hand, it can further improve the stability of the fixation of the pole piece 500, thereby improving the effect of improving the laser cutting quality and improving the technical problems of the finished product after die cutting, such as the existence of edge corners and abnormal polar ears.

[0037] Please refer to Figure 4 In the battery tab die cutting equipment example, the second adsorption plate 222 includes a flat portion 2221 and a special-shaped portion 2222. The flat portion 2221 is close to the driving device 300. When the space allows, the flat portion 2221 can obtain a larger utilization area and improve the adsorption force. The special-shaped portion 2222 is connected to the flat portion 2221 and extends in the direction of the first negative pressure adsorption assembly 210, and the outer contour of the special-shaped portion 2222 can avoid the moving track of the laser. The special-shaped portion 2222 can maximize the space utilization, further improve the adsorption capacity of the second adsorption plate 222, and improve the stability of the fixation of the pole piece 500.

[0038] Please refer to Figure 1In one example of the battery tab die-cutting equipment of this utility model, the driving device 300 includes a guide roller 310 and a pressing roller 320 for pressing the electrode sheet 500 against the guide roller 310. The guide roller 310 is externally connected to a power source to rotate it. The guide roller 310 and the pressing roller 320 press the electrode sheet 500 together, and while the guide roller 310 rotates, the electrode sheet 500 moves along with the rotation of the guide roller 310 due to friction. In this embodiment, the direction of movement of the electrode sheet 500 is as follows: Figure 1 The X direction is shown. It should be noted that the power source connected to the roller 310 can be a direct external motor or other power component, or it can be indirectly connected to a motor or other power component through a transmission structure such as belt drive, gear drive, or chain drive. There is no limitation on the connection; the design can be adapted as needed, as long as the roller 310 has rotational power and moves under the pressure of the pressing roller 320. In this embodiment, the roller 310 is indirectly connected to a motor via belt drive to achieve its own rotation.

[0039] Please see Figure 5 In one example of the battery tab die-cutting equipment of this utility model, the extended surface of the adsorption surface of the second adsorption plate 222 passes through the tangent line between the roller 310 and the electrode 500. This arrangement can prevent the traction force of the driving device 300 on the electrode 500 from affecting the stability of the electrode 500, so as to achieve that the surface of the electrode 500 on the second adsorption surface and the highest point of the roller 310 in the horizontal direction are coplanar, thereby improving the stability of the electrode 500 during the movement process and further improving the laser cutting quality.

[0040] Please see Figure 1 In one example of the battery tab die-cutting equipment of this utility model, a waste recycling device 400 is also included. The waste recycling device 400 is located downstream of the second negative pressure adsorption component 220. It can be located upstream or downstream of the driving device 300, and there is no limitation on this, as long as it can collect the cut waste. There are various types of waste recycling devices 400. For example, it can use a negative pressure structure to suck down the waste, or it can be a blowing device to blow down the waste. There is no limitation on this. As long as the waste can be separated from the electrode 500, this setting is beneficial to clean up the scraps remaining on the tab. This can improve the processing quality of the tab.

[0041] Please see Figure 1In the battery tab die-cutting equipment example of the utility model, the waste recovery device 400 includes a conveying belt 410 and multiple rollers, all the rollers are drivingly connected with the over roller 310 through the conveying belt 410, the number of the rollers is not limited, the number and the installation position of the rollers are not limited, and adaptive selection and design are carried out according to space and the running direction of the conveying belt. Further, the conveying belt 410 is provided with suction holes, a third negative pressure cavity is arranged in the area surrounded by the conveying belt 410, and the third negative pressure cavity sucks the waste cut down through the suction holes. The arrangement realizes the effect of sucking the waste by negative pressure, and improves the technical problems that the finished product after die cutting exists with edge corners and the tab is of an irregular shape.

[0042] Please refer to Figure 1 In the battery tab die-cuting equipment example of the utility model, the multiple rollers include a first roller 420 arranged on the side of the over roller 310 away from the adsorption device 200, and the part of the conveying belt 410 between the over roller 310 and the first roller 420 is a first adsorption area 430. After die cutting, most of the waste still does not fall off the tab 500 due to the adsorption effect of the second adsorption plate 222, the tab 500 with the waste enters between the over roller 310 and the compression roller 320 in turn, and then runs to the first adsorption area 430, until most of the waste still does not fall off, and the tab 500 continues to move in the X direction shown in the drawing. Figure 1 Further, the first adsorption area 430 and the discharge direction of the tab 500 are arranged to have an included angle of 0°-20°, so that the first adsorption area 430 has a tendency to move away from the X direction, and the third negative pressure cavity covers the first adsorption area 430. The suction holes of the conveying belt 410 located in the first adsorption area 430 can suck the waste, and the waste moves in the Y direction shown in the drawing to separate from the tab 500. The technical problem that the finished product after die cutting exists with edge corners is further improved. Figure 1

[0043] Please refer to Figure 1 In the battery tab die-cuting equipment example of the utility model, the multiple rollers further include a second roller 440 arranged on the side of the first roller 420 away from the over roller 310, and the part of the conveying belt 410 between the second roller 440 and the first roller 420 is a second adsorption area 450. The conveying belt 410 with the waste runs to the second adsorption area together after adsorbing the waste in the first adsorption area 430. Further, the second adsorption area 450 and the discharge direction of the tab 500 have an included angle of 20°-85°, and the third negative pressure cavity covers the second adsorption area 450. The arrangement makes the sucked waste further away from the tab 500, and the next collection operation can be carried out uniformly. Preferably, a waste recovery box is arranged below the second adsorption area 450 to accommodate the waste. The technical problem that the finished product after die cutting exists with edge corners is further improved. ​

[0044] The utility model discloses battery pole lug die cutting equipment, with adsorption device adsorbing the pole piece of processing, makes the pole piece can be fixed in the position of the irradiation of laser head. Through drive device draws pole piece loading to laser cutting area, and draws pole piece unloading after completing laser die cutting. The adsorption device in this technical scheme is provided with first negative pressure adsorption component and second negative pressure adsorption component, and the setting can improve the stability of pole piece in the processing, to reduce the shaking, and then improve the laser out of focus problem caused by the shaking of pole piece, can realize the improvement of laser cutting quality, improve the technical problem that the finished product exists with edge corner material, pole lug special shape after die cutting. Therefore, the utility model effectively overcomes some practical problems in the prior art, thereby having high utilization value and use significance. The above embodiment only exemplarily illustrates the principle and effect of the utility model, and is not used for limiting the utility model. Any person skilled in the art can modify or change the above embodiment without departing from the spirit and scope of the utility model. Therefore, all equivalent modifications or changes completed by those skilled in the art under the spirit and technical thought disclosed by the utility model still should be covered by the claims of the utility model.

Claims

1. A battery tab die-cutting device, used to cut tabs on electrode sheets, characterized in that, The application relates to a laser cutting device for cutting a tab on a pole piece, comprising: a laser head for emitting laser to cut the tab on the pole piece; a suction device arranged opposite to the direction of laser emission, the suction device comprising a first negative pressure suction assembly and a second negative pressure suction assembly for suctioning the pole piece, and a laser irradiation area for laser passing between the first negative pressure suction assembly and the second negative pressure suction assembly; a driving device for pulling the pole piece through the laser irradiation area; wherein the first negative pressure suction assembly and the second negative pressure suction assembly are communicated.

2. The battery tab die-cutting apparatus of claim 1, wherein, The first negative pressure suction assembly comprises a first negative pressure cavity and a first suction plate arranged on the opening of the first negative pressure cavity, the second negative pressure suction assembly comprises a second negative pressure cavity and a second suction plate arranged on the opening of the second negative pressure cavity, the first negative pressure cavity and the second negative pressure cavity are communicated through an air pipe, and a vacuum generating device is arranged outside the first negative pressure cavity or the second negative pressure cavity.

3. The battery tab die-cutting apparatus of claim 2, wherein, The second negative pressure suction assembly is located between the first negative pressure suction assembly and the driving device, the first suction plate and the second suction plate are vertically arranged, and the suction surface of the first suction plate and the suction surface of the second suction plate are coplanar.

4. The battery tab die-cutting apparatus of claim 3, wherein, The second suction plate comprises a flat part and a special-shaped part, the flat part is close to the driving device, the special-shaped part is connected to the flat part and extends to the direction of the first negative pressure suction assembly, and the outer contour of the special-shaped part can avoid the moving track of the laser.

5. The battery tab die-cutting apparatus of claim 2, wherein, The driving device comprises a passing roller and a pressing roller for pressing the pole piece to the passing roller, and a power source is arranged outside the passing roller to drive the passing roller.

6. The battery tab die-cutting apparatus of claim 5, wherein, The extension of the suction surface of the second suction plate passes the tangent line of the passing roller and the pole piece.

7. The battery tab die-cutting apparatus of claim 5, wherein, The application further relates to a waste recovery device arranged downstream of the second negative pressure suction assembly for collecting the cut waste.

8. The battery tab die-cutting apparatus of claim 7, wherein, The waste recovery device comprises a conveying belt and a plurality of rollers, all the rollers are drivingly connected to the passing roller through the conveying belt, the conveying belt is provided with suction holes, a third negative pressure cavity is arranged in the area surrounded by the conveying belt, and the third negative pressure cavity absorbs the cut waste through the suction holes.

9. The battery tab die-cutting apparatus of claim 8, wherein, The plurality of rollers comprise a first roller arranged on the side of the passing roller away from the suction device, the part of the conveying belt between the passing roller and the first roller is a first suction area, the first suction area has an included angle of 0-20 degrees with the discharging direction of the pole piece, and the third negative pressure cavity covers the first suction area.

10. The battery tab die-cutting apparatus of claim 9, wherein, The plurality of rollers further comprise a second roller arranged on the side of the first roller away from the passing roller, the part of the conveying belt between the second roller and the first roller is a second suction area, the second suction area has an included angle of 20-85 degrees with the discharging direction of the pole piece, and the third negative pressure cavity covers the second suction area.

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