Collecting disc blanking device and feeding system

Abstract

The utility model relates to the technical field of battery production, and provides a collector plate blanking device and a feeding system. The collector plate blanking device comprises an upper die, a lower die, an eccentric cam, a connecting piece and a driving assembly. The upper die is arranged above the lower die, a material belt groove is formed in the upper die, and a material belt can penetrate through the material belt groove; a protruding part is arranged on the top face of the lower die, a through hole corresponding to the protruding part is formed in the upper die, and the through hole penetrates through the bottom face from the top face of the upper die. The driving assembly drives the connecting piece to vertically move by driving the eccentric cam to rotate; the connecting piece is fixedly connected with the upper die, the upper die is driven to be close to or away from the lower die through vertical movement of the connecting piece, so that the protruding part is arranged in the through hole in a penetrating mode, and the collecting disc is punched on the material belt and then retreats. The collector plate blanking device is simple in structure and convenient to operate, the consistency of the blanked collector plates is high, and the blanking efficiency is high.

Description

Technical Field

[0001] The utility model relates to the technical field of battery production, in particular to a current collector blanking device and a feeding system. Background Art

[0002] The current collector is one of the important components of a full-tab battery. The current collector is used to electrically connect the battery cells and the positive or negative terminals of the battery. During the manufacturing process, the size and surface smoothness of the current collector greatly affect the quality of the current collector. Among them, in the preparation process of the current collector, wire cutting is usually used for cutting. During wire cutting, a coolant is sprayed on the surface of the cutting piece to reduce the temperature of the workpiece body. However, after the cut current collector is contaminated with the coolant, it is prone to rust, affecting the product quality. Summary of the Utility Model

[0003] The utility model provides a current collector blanking device and a feeding system to solve the problems of complex operation and low product quality in the prior art when using wire cutting to manufacture current collectors.

[0004] The utility model provides a current collector blanking device, including: an upper die, a lower die, an eccentric cam, a connecting member, and a driving assembly; the upper die is arranged above the lower die, and a strip groove is arranged in the upper die for a strip to pass through; a convex portion is arranged on the top surface of the lower die, and a through hole corresponding to the convex portion is arranged on the upper die, and the through hole runs through from the top surface to the bottom surface of the upper die; the driving assembly drives the eccentric cam to rotate, driving the connecting member to move vertically; the connecting member is fixedly connected to the upper die, and drives the upper die to approach or move away from the lower die through the vertical movement of the connecting member, so that the convex portion passes through the through hole, punches out a current collector on the strip, and then withdraws.

[0005] According to the current collector blanking device provided by the utility model, the driving assembly includes a connecting rod and a driving motor. One end of the connecting rod is connected to the connecting member, the other end of the connecting rod is connected to the eccentric cam through a bearing, and the driving motor is connected to the eccentric cam.

[0006] According to the current collector blanking device provided by the utility model, it further includes a limiting rod and a bracket; the middle of the bracket is hollowed out for the connecting rod to swing; both ends of the limiting rod are respectively fixed on the bracket with a hollow middle, the limiting rod is connected to the connecting rod through a bearing, and the limiting rod is perpendicular to the connecting rod, for limiting the swing of the bracket, so as to realize that the driving assembly drives the eccentric cam to rotate and drives the connecting member to move vertically.

[0007] A blanking device for a current collector tray according to the present utility model further includes an outer frame, a slider, and a slide rail; the outer frame is fixedly arranged on the table board for supporting the lower die; the slider is fixedly arranged on the outer frame, the slider is slidably connected to the slide rail, the slide rail is vertically extended and arranged on the bracket, and the slide rail is fixedly connected to the connecting member.

[0008] A blanking device for a current collector tray according to the present utility model, the protruding portion includes a first protruding portion and a second protruding portion, the first protruding portion and the second protruding portion are arranged at intervals along the conveying direction of the strip; the through holes include a first through hole and a second through hole, the first through hole is correspondingly arranged with the first protruding portion, the second through hole is correspondingly arranged with the second protruding portion, the first protruding portion is used for blanking the third through hole on the current collector tray, and the second protruding portion is used for blanking the current collector tray from the strip.

[0009] A blanking device for a current collector tray according to the present utility model further includes an adsorption assembly, the adsorption assembly is located above the upper die and is close to the first through hole, and is used for adsorbing the remaining material generated by blanking in the first through hole by the first protruding portion.

[0010] A blanking device for a current collector tray according to the present utility model further includes an elastic member, the elastic member is arranged between the upper die and the lower die for realizing elastic blanking.

[0011] A blanking device for a current collector tray according to the present utility model further includes a backing plate, the backing plate is arranged on the top surface of the lower die, and the backing plate is provided with a relief hole for allowing the protruding portion to protrude upward relative to the backing plate.

[0012] A blanking device for a current collector tray according to the present utility model, the first protruding portion, the second protruding portion, the first through hole, and the second through hole are all multiple, and the number of the first through holes corresponds to the number of the first protruding portions, and the number of the second through holes corresponds to the number of the second protruding portions.

[0013] The present utility model further provides a feeding system for a current collector tray, including the blanking device for a current collector tray as described in any one of the above and a material taking device, the material taking device is arranged close to the blanking device for a current collector tray and is located above the upper die, and is used for sucking the current collector tray and placing it at the subsequent working station.

[0014] The current collector disc blanking device and the feeding system provided by the utility model connect one end of a connecting piece to the upper die, and the other end of the connecting piece to an eccentric cam. A driving assembly drives the eccentric cam to rotate, thereby driving the upper die to approach the lower die. The convex portion passes through the through hole, and a current collector disc is blanked out on the strip in the strip groove, and then withdraws after blanking. The utility model has a simple structure, convenient operation, high consistency of the blanked current collector disc, and high blanking efficiency. Brief Description of the Drawings

[0015] In order to more clearly illustrate the technical solutions in the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0016] Figure 1 is one of the structural schematic diagrams of the current collector disc blanking device provided by the present utility model;

[0017] Figure 2 is another structural schematic diagram of the current collector disc blanking device provided by the present utility model;

[0018] Figure 3 is the third structural schematic diagram of the current collector disc blanking device provided by the present utility model;

[0019] Figure 4 is the structural schematic diagram of the eccentric cam provided by the present utility model;

[0020] Reference Numerals:

[0021] 1. Upper die; 2. Strip groove; 3. Lower die; 4. Connecting piece; 5. Eccentric cam; 6. Connecting rod; 7. Driving motor; 8. Limiting rod; 9. Bracket; 10. Slide block; 11. Slide rail; 12. Adsorption assembly; 13. Elastic member; 14. Base plate; 15. Strip; 16. Outer frame. Detailed Description of the Embodiments

[0022] To make the purpose, technical solutions and advantages of the present utility model clearer, the following will clearly and completely describe the technical solutions in the present utility model in conjunction with the drawings in the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art without creative efforts based on the embodiments in the present utility model belong to the scope of protection of the present utility model.

[0023] In the description of the embodiments of the present utility model, it should be noted that, unless otherwise clearly specified and defined, the terms "connected" and "connected to" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific circumstances.

[0024] In the description of the embodiments of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the embodiments of the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be understood as a limitation to the embodiments of the present utility model.

[0025] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, the meaning of "a plurality" is two or more, unless otherwise specifically and clearly defined.

[0026] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals indicate the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present utility model, and should not be construed as a limitation to the present utility model.

[0027] The following disclosure provides many different embodiments or examples for implementing different structures of the present utility model. To simplify the disclosure of the present utility model, the components and settings of specific examples are described below. Of course, they are only examples and are not intended to limit the present utility model. In addition, the present utility model may repeat reference numerals and / or letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present utility model provides examples of various specific processes and materials, but those of ordinary skill in the art can be aware of the applicability of other processes and / or the use of other materials.

[0028] The following will be combined with Figures 1 to 4 Describe the current collector blanking device and the feeding system provided by the present utility model.

[0029] The current collector plate blanking device provided by the utility model includes: an upper die 1, a lower die 3, an eccentric cam 5, a connecting member 4, and a driving assembly; the upper die 1 is arranged above the lower die 3, and a strip groove 2 is provided in the upper die 1 for a strip 15 to pass through; a convex portion is provided on the top surface of the lower die 3, and a through hole corresponding to the convex portion is provided in the upper die 1, and the through hole penetrates through the upper die 1 from the top surface to the bottom surface.

[0030] Reference Figure 1 , in the current collector plate blanking device provided in this embodiment, a strip groove 2 is provided on the upper die 1, and the size of the strip groove 2 is set according to the size of the strip 15. The strip 15 is threaded through the strip groove 2 and can be conveyed along the extending direction of the strip 15.

[0031] A through hole is provided on the upper die 1, and the through hole extends from the top surface to the bottom surface of the upper die 1, that is, the through holes above and below the strip groove 2 correspond one by one; a convex portion is provided on the lower die 3, and the convex portion is correspondingly arranged with the through hole. Driving the upper die 1 to move downward or driving the lower die 3 to move upward, the convex portion can penetrate through the through hole.

[0032] The structure of the eccentric cam 5 in this embodiment is as Figure 4 shown; the driving assembly is connected to the eccentric cam 5, the driving assembly drives the eccentric cam 5 to rotate, drives the connecting member 4 to move up and down in the vertical direction, that is, drives the upper die 1 to approach the lower die 3, the convex portion penetrates through the through hole, punches the current collector plate on the strip 15, and after punching is completed, drives the upper die 1 to move away from the lower die 3, and the convex portion leaves the through hole to prepare for the next punching. The utility model has a simple structure, convenient operation, high consistency of the punched current collector plates, and high punching efficiency.

[0033] On the basis of the above embodiment, reference Figure 2 , the driving assembly includes a connecting rod 6 and a driving motor 7. One end of the connecting rod 6 is connected to the connecting member 4, the other end of the connecting rod 6 is connected to the eccentric cam 5 through a bearing, and the driving motor 7 is connected to the eccentric cam 5.

[0034] The driving assembly in this embodiment further includes a rotating shaft. The driving end of the driving motor 7 is connected to one end of the rotating shaft, the eccentric cam 5 is fixedly connected to the rotating shaft, and the driving motor 7 drives the rotating shaft to drive the eccentric cam 5 to rotate, thereby driving the connecting rod 6 and the connecting member 4 to move up and down in the vertical direction, that is, driving the upper die 1 to approach or move away from the lower die 3, and punching out the current collector plate on the strip 15 and then withdrawing.

[0035] The current collector plate blanking device in this embodiment further includes a limiting rod 8 and a bracket 9; the middle of the bracket 9 is hollowed out for the connecting rod 6 to swing; a connecting member 4 is provided on the bracket, and both ends of the limiting rod 8 are respectively fixed on the bracket 9 with a hollow middle. The limiting rod 8 is connected to the connecting rod 6 through a bearing, and the connecting rod 6 rotates around the limiting rod 8, or both ends of the limiting rod 8 are connected to both sides of the bracket 9 through bearings, and the connecting rod 6 is fixedly connected to the limiting rod 8. The limiting rod 8 and the connecting rod 6 can rotate around the rotation axis of the bracket 9; wherein the limiting rod 8 is perpendicular to the connecting rod 6, so that the driving assembly drives the eccentric cam 5 to rotate, driving the connecting member 4 to move vertically.

[0036] When the driving motor 7 drives the eccentric cam 5 to rotate, driving the connecting rod 6 and the connecting member 4 to move vertically, the connecting rod 6 swings at the hollow position in the middle of the bracket 9. In order to reduce the influence of the swing on blanking, in this embodiment, a limiting rod 8 is provided on the connecting rod 6, and the connecting rod 6 can rotate around the limiting rod 8, or the limiting rod 8 rotates to adjust the angle of the connecting rod 6. During the process of the driving assembly driving the eccentric cam 5 to rotate, the bracket 9 is prevented from deflecting, so as to ensure the position where the connecting member 4 drives the upper die 1 to move up and down vertically. In this embodiment, the connection position between the limiting rod 8 and the connecting rod 6 is not specifically limited. For example, Figure 3 As shown, the limiting rod 8 can be provided at the top of the connecting rod 6; the limiting rod 8 can also be provided in the middle of the connecting rod 6.

[0037] Reference Figure 3 , the limiting rod 8 is connected to the top of the connecting rod 6 through a bearing, and both ends of the limiting rod 8 are respectively connected to both sides of the bracket 9, and the extending direction of the limiting rod 8 is perpendicular to the extending direction of the connecting rod 6. When the driving assembly drives the eccentric cam 5 to rotate, driving the connecting rod 6 to drive the upper die 1 to move up and down vertically, the connecting rod 6 can rotate on the limiting rod 8.

[0038] The current collector plate blanking device provided in this embodiment further includes an outer frame 16, a slider 10 and a slide rail 11; the outer frame 16 is fixedly arranged on the table board for supporting the lower die 3; the slider 10 is fixedly arranged on the outer frame 16, the slide rail 11 extends vertically on the bracket 9, the slider 10 is slidably connected to the slide rail 11, and the slide rail 11 is fixedly connected to the connecting member 4.

[0039] Reference Figure 3 , the slide rail 11 is arranged on the outer side wall of the bracket 9 and extends vertically. The slider 10 is fixedly arranged on the outer frame 16, the connecting member 4 is fixedly connected to the slide rail 11. The driving assembly drives the eccentric cam 5 to rotate, driving the bracket 9 to move up and down, that is, driving the slide rail 11 to move up and down, and further driving the connecting member 4 to move up and down, driving the upper die 1 to approach or move away from the lower die 3, so as to complete the blanking of the current collector plate.

[0040] Further, the slide rail 11 is arranged on the outer side wall of the bracket 9 through a mounting plate, and the mounting plate can be connected to the bracket 9 by bolts. A clamping groove is provided on one side of the mounting plate close to the outer side wall of the bracket 9, and the extending direction of the clamping groove is perpendicular to the extending direction of the slide rail 11. A clamping strip is also provided on the outer side wall of the bracket 9. The mounting plate is clamped on the clamping strip through the clamping groove, thereby fixing the slide rail 11 on the bracket, strengthening the connection between the slide rail 11 and the bracket 9, preventing it from loosening, and having good stability.

[0041] The protruding portions provided in this embodiment include a first protruding portion and a second protruding portion, and the first protruding portion and the second protruding portion are arranged at intervals in the front and rear directions along the conveying direction of the strip 15; the through holes include a first through hole and a second through hole, the first through hole is correspondingly arranged with the first protruding portion, the second through hole is correspondingly arranged with the second protruding portion, the first protruding portion is used for punching a third through hole on the current collector plate, such as a positioning hole on the current collector plate, an electrolyte through hole at the center of the current collector plate, etc., and the second protruding portion is used for punching the current collector plate from the strip 15.

[0042] The driving component drives the eccentric cam 5 to rotate, the connecting piece 4 drives the upper die 1 to move downward, the first protruding portion passes through the first through hole, a third through hole on the current collector plate is punched out on the strip 15, the second protruding portion passes through the second through hole, and the current collector plate is punched out on the strip 15, and the punching of the first group of current collector plates is completed; the material taking device sucks the punched current collector plate and places it on the subsequent working station, and the strip 15 continues to convey along the conveying direction, and the next group of punching starts.

[0043] In the actual operation process, the driving component drives the connecting piece 4 to move downward, thereby driving the strip 15 in the upper die 1 to press against the lower die 3, and completing the punching of the strip 15 by the first protruding portion and the second protruding portion at the same time; the first protruding portion is used for punching a third through hole on the strip 15 for the current collector plate, and the second protruding portion is used for punching the current collector plate on the strip 15 after the third through hole is punched, and multiple current collector plates can be punched at the same time, and the punching efficiency is high.

[0044] The current collector plate punching device in this embodiment further includes an adsorption component 12. The adsorption component 12 is located above the upper die 1 and is close to the first through hole, and is used for adsorbing the waste material generated by the first protruding portion punching the third through hole in the first through hole, ensuring the cleanliness in the first through hole, avoiding affecting the next punching, and thus improving the product quality.

[0045] The first protruding portion, the second protruding portion, the first through hole and the second through hole in this embodiment are all multiple, and the number of the first through holes corresponds to the number of the first protruding portions, and the number of the second through holes corresponds to the number of the second protruding portions.

[0046] The number of the first protruding portion, the second protruding portion, the first through hole and the second through hole in this embodiment can be set according to the width of the strip, the size of the upper die 1, the size of the lower die 3 and the size of the current collector plate, maximizing the utilization of the strip and saving raw materials.

[0047] The first convex portion and the second convex portion are arranged at intervals in the first direction. Both the first convex portion and the second convex portion are provided with multiple rows in the second direction. Each row of the first convex portion is provided with multiple first protrusions in the first direction, and each row of the second convex portion is provided with multiple second protrusions in the first direction. Any two adjacent rows of the first convex portions are arranged in a staggered manner in the second direction, and any two adjacent rows of the second convex portions are arranged in a staggered manner in the second direction. The first direction is consistent with the extending direction of the strip, and the second direction is perpendicular to the first direction, that is, the second direction is the width direction of the strip 15. Correspondingly, multiple first through holes are arranged in one-to-one correspondence with multiple first convex portions, and multiple second through holes are arranged corresponding to multiple second convex portions.

[0048] In one embodiment, the first convex portion is provided with two rows in the second direction, and each row is provided with two first protrusions. The first protrusion on the first row is arranged in a staggered manner in the second direction with any protrusion on the second row. Similarly, the second convex portion is provided with two rows in the second direction, and the second protrusion on the first row is arranged in a staggered manner in the second direction with any protrusion on the second row.

[0049] Correspondingly, 4 first through holes are arranged in one-to-one correspondence with 4 first convex portions, and 4 second through holes are arranged corresponding to 4 second convex portions.

[0050] With such an arrangement, not only can multiple current collectors be blanked at one time, but also the strip can be utilized to the maximum extent, saving raw materials.

[0051] In addition, in combination with the size of the current collector and the width of the strip, the numbers of the first convex portion, the second convex portion, the first through hole, and the second through hole can also be other numbers, and the optimal selection is made according to the actual situation.

[0052] The current collector blanking device in this embodiment further includes an elastic member 13. The elastic member 13 is arranged between the upper die 1 and the lower die 3 for realizing elastic blanking.

[0053] When the driving assembly drives the connecting member 4 to drive the upper die 1 to move downward relative to the lower die 3, the elastic member 13 is deformed to absorb the impact energy of the upper die 1, reduce the stress on the strip 15 during the blanking process, thereby reducing the shear stress of the strip 15 and avoiding the phenomenon of tearing. At the same time, due to the deformation of the elastic member 13, the gap between the upper die 1 and the lower die 3 is reduced, improving the blanking quality and precision. In addition, the arrangement of the elastic member 13 also reduces the wear of the upper die 1 and the lower die 3 and prolongs the service life.

[0054] The number of the elastic members 13 in this embodiment can be multiple, and the multiple elastic members 13 are distributed between the upper die 1 and the lower die 3. In one embodiment, the number of the elastic members 13 is 2; it can also be 3, 4, etc.

[0055] The current collector plate blanking device in this embodiment further includes a backing plate 14. The backing plate 14 is used to protect the bottom surface of the through hole on the upper die 1, prevent it from deforming, and ensure the blanking quality. The backing plate 14 is provided on the top surface of the lower die 3, and the backing plate 14 is provided with an avoidance hole for the convex portion to protrude upward relative to the backing plate 14. The backing plate 14 in this embodiment can also be provided on the bottom surface of the upper die 1.

[0056] The size of the backing plate 14 is smaller than that of the upper die 1 and also smaller than that of the lower die 3 to reserve a position space for the installation of the elastic member 13.

[0057] In one embodiment, the backing plate 14 is further provided with a relief hole, and the position, size, and quantity of the relief holes are set according to the installation position, size, and quantity of the elastic member 13.

[0058] When the backing plate in this embodiment is provided on the bottom surface of the lower die, it can be integrally formed with the lower die. When the backing plate is provided on the bottom surface of the upper die, it can be integrally formed with the upper die 1, which is convenient for efficient replacement after later wear.

[0059] This embodiment also provides a current collector plate feeding system, including the current collector plate blanking device and a material taking device in any of the above embodiments. The material taking device is arranged close to the current collector plate blanking device and is located above the upper die 1. When the current collector plate blanking device punches out the current collector plate, the material taking device is used to suck the current collector plate and place it in the subsequent working station.

[0060] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments or perform equivalent replacements for some of the technical features. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A current collecting plate blanking device, characterized in that: include: Upper die, lower die, eccentric cam, connector and drive assembly; The upper mold is arranged above the lower mold, and a material strip groove is arranged in the upper mold, and the material strip groove is used for the material strip to pass through; The top surface of the lower mold is provided with a protrusion, and the upper mold is provided with a through hole corresponding to the protrusion, and the through hole is arranged along the top surface of the upper mold to the bottom surface; The driving assembly drives the eccentric cam to rotate, thereby driving the connecting piece to move vertically; the connecting piece is fixedly connected to the upper die, and the upper die is driven to approach or move away from the lower die through the vertical movement of the connecting piece, so that the protrusion passes through the through hole and exits after the collecting plate is punched out on the material strip.

2. The current collecting plate punching device according to claim 1, characterized in that: The driving assembly includes a connecting rod and a driving motor, one end of the connecting rod is connected to the connecting piece, the other end of the connecting rod is connected to the eccentric cam through a bearing, and the driving motor is connected to the eccentric cam.

3. The current collecting plate punching device according to claim 2, characterized in that: It also includes a limit rod and a bracket; the middle part of the bracket is hollowed out for the connecting rod to swing; the two ends of the limit rod are respectively fixed on the hollow bracket in the middle, the limit rod is connected to the connecting rod through a bearing, and the limit rod is perpendicular to the connecting rod, which is used to limit the swing of the bracket, so that the driving component drives the eccentric cam to rotate and drive the connecting piece to move vertically.

4. The current collecting plate punching device according to claim 3, characterized in that: It also includes an outer frame, a slider and a slide rail; the outer frame is fixed on the table and is used to support the lower mold; the slider is fixed on the outer frame, the slider is slidably connected to the slide rail, the slide rail is vertically extended on the bracket, and the slide rail is fixedly connected to the connecting piece.

5. The current collecting plate punching device according to claim 1, characterized in that: The raised portion includes a first raised portion and a second raised portion, and the first raised portion and the second raised portion are arranged at intervals along the conveying direction of the material strip; the through hole includes a first through hole and a second through hole, and the first through hole is arranged corresponding to the first raised portion, and the second through hole is arranged corresponding to the second raised portion, the first raised portion is used to punch out the third through hole on the collecting plate, and the second raised portion is used to punch out the collecting plate from the material strip.

6. The current collecting plate punching device according to claim 5, characterized in that: It also includes an adsorption component, which is located above the upper mold and close to the first through hole, and is used to absorb the residual material in the first through hole produced by punching the first protrusion.

7. The current collecting plate punching device according to claim 1, characterized in that: It also includes an elastic member, which is arranged between the upper die and the lower die and is used to achieve elastic blanking.

8. The current collecting plate punching device according to claim 1, characterized in that: It also includes a pad, which is arranged on the top surface of the lower mold, and an avoidance hole is provided on the pad, and the avoidance hole is used for the protrusion to protrude upward relative to the pad.

9. The current collecting plate punching device according to claim 5, characterized in that: The first protrusion, the second protrusion, the first through hole and the second through hole are all plural, and the number of the first through holes corresponds to the number of the first protrusions, and the number of the second through holes corresponds to the number of the second protrusions.

10. A collecting plate feeding system, characterized in that: It comprises a current collecting plate blanking device and a material taking device as described in any one of claims 1 to 9, wherein the material taking device is arranged close to the current collecting plate blanking device and located above the upper mold, and is used to suck the current collecting plate and place it in a subsequent workstation.

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