Pole piece die cutting assembly

Abstract

The invention relates to a pole piece die cutting assembly. The pole piece die cutting assembly comprises a base body; the cutter module comprises a first cutter device and a second cutter device, the second cutter device is arranged on the base body, and the first cutter device is connected with the base body in a sliding mode; the first driving device comprises a first driving part, an eccentric rotating shaft and a mounting seat, the eccentric rotating shaft comprises a shaft body and an eccentric shaft arranged at one end of the shaft body, the eccentric shaft and the shaft body are eccentrically arranged, the shaft body is rotatably arranged on the mounting seat, and one end, deviating from the eccentric shaft, of the shaft body is connected with the first driving part; the first cutter device is provided with an arc-shaped groove, one end of the eccentric shaft is located in the arc-shaped groove, and the first driving piece is used for driving the eccentric rotating shaft to rotate so that the eccentric shaft can drive the first cutter device to move when moving along the arc-shaped groove. According to the scheme provided by the invention, the burr rate of a pole piece notch during high-speed operation can be reduced.

Description

Technical Field

[0001] The present application relates to the technical field of lithium battery manufacturing equipment, and in particular to a pole piece die-cutting assembly. Background Art

[0002] Lithium-ion battery electrode die-cutting is a core process in integrated cutting and laminating machines, and its processing accuracy directly impacts the safety performance of the battery cells. In related technologies, the die-cutting assembly uses a motor plus a screw or pneumatic cylinder as a power source, rigidly connected to the cutter, driving the cutter to perform the die-cutting operation, thereby die-cutting the electrode material strip during transport into sheets. The cutter's movement accuracy affects the die-cutting quality.

[0003] However, at conventional production speeds, the relevant technical solutions can meet basic processing needs. However, as the industry's requirements for production efficiency increase, the die-cutting speed of the cutter needs to be increased. When running at high speeds, the cutter will be affected by the vibration of the power source and will resonate with the power source. The structural resonance can cause the burr rate of the pole piece cut to be too high, affecting the safety performance of the battery. Summary of the Invention

[0004] The present application provides a pole piece die-cutting assembly to solve the problem of excessively high pole piece cut burr rate due to mechanism resonance when the die-cutting speed is too fast.

[0005] The present application provides a pole piece die-cutting assembly, comprising: a base; a cutting die set, comprising a first cutting device and a second cutting device, the first cutting device and the second cutting device being arranged opposite to each other, the second cutting device being arranged on the base, and the first cutting device being slidably connected to the base; a first driving device being arranged on the base, the first driving device comprising a first driving member, an eccentric rotating shaft and a mounting seat, the eccentric rotating shaft comprising a shaft body and an eccentric shaft arranged at one end of the shaft body, the eccentric shaft being eccentrically arranged with the shaft body, the shaft body being rotatably arranged on the mounting seat, the end of the shaft body facing away from the eccentric shaft being connected to the first driving member; wherein, an arc groove is provided on a side of the first cutting device facing the first driving device, the end of the eccentric shaft facing away from the shaft body is located in the arc groove, and the first driving member is used to drive the eccentric rotating shaft to rotate, so that the eccentric shaft can drive the first cutting device to move when it moves along the arc groove.

[0006] Furthermore, a roller bearing follower is provided at one end of the eccentric shaft located in the arc-shaped groove, and an outer wall of the roller bearing follower abuts against an inner wall of the arc-shaped groove.

[0007] Furthermore, the first driving device further includes a reducer, the first driving member is a motor, and the first driving member is connected to the shaft through the reducer.

[0008] Furthermore, the pole piece die-cutting assembly further comprises a main drive roller and a traction pressure roller arranged opposite to each other, the main drive roller and the traction pressure roller are both rotatably connected to the base, and the main drive roller and the traction pressure roller are both located on one side of the cutting die assembly; A second driving member is provided at one end of the main driving roller, and the second driving member is used to drive the main driving roller to rotate.

[0009] Furthermore, the first driving member and the second driving member are both motors, and the output shaft of the first driving member is arranged perpendicular to the output shaft of the second driving member.

[0010] Furthermore, the base includes a base and a first bracket and a second bracket respectively arranged on the base, the mounting seat is arranged on the first bracket, and the second driving member is arranged on the second bracket.

[0011] Furthermore, the first driving component is a servo motor, and the second driving component is a DD motor.

[0012] Furthermore, the first cutter device includes a first locker, a first cutter mounting seat and a first cutter provided on the first cutter mounting seat, and the first cutter mounting seat is detachably connected to the first cutter via the first locker.

[0013] Furthermore, the second cutter device includes a base, a fixed platform, a mounting block, a second locker and a second cutter, the base is connected to the base, the mounting block is detachably connected to the base through the second locker, the mounting block abuts against the fixed platform to limit the fixed platform to the base, and the second cutter is arranged on the fixed platform.

[0014] Furthermore, the first locker and the second locker are both knob-type wedge-shaped lockers.

[0015] The technical solution provided by the present application may include the following beneficial effects: the eccentric shaft is driven to rotate relative to the mounting seat by the first driving member, so that the eccentric shaft swings in the arc-shaped groove, and the eccentric shaft can drive the first cutter device to move up and down when swinging along the arc-shaped groove, thereby completing the die-cutting of the pole piece strip; in the above solution, the first driving member and the first cutter device are connected by the eccentric shaft and the arc-shaped groove. Compared with the rigid connection method in the related technology, the vibration transmission efficiency of this non-rigid connection transmission method is lower, thereby weakening the resonance phenomenon between the first cutter device and the first driving member, and then reducing the vibration of the first cutter device, ensuring the accuracy during high-speed die-cutting, and reducing the burr rate of the pole piece incision.

[0016] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and other objects, features and advantages of the present application will become more apparent by describing in more detail exemplary embodiments of the present application in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments of the present application.

[0018] Figure 1 Schematic diagram of the structure of the pole piece die-cutting assembly shown in the embodiment of the present application; Figure 2 1 is another structural schematic diagram of the pole piece die-cutting assembly shown in an embodiment of the present application; Figure 3 1 is another structural schematic diagram of the pole piece die-cutting assembly shown in an embodiment of the present application; Figure 4 1 is a schematic diagram of the assembly of the reducer, eccentric shaft, mounting seat and first cutting device shown in an embodiment of the present application; Figure 5 yes Figure 4 sectional view of Figure 6 Schematic diagram of the structure of the eccentric shaft shown in the embodiment of the present application; Figure 7 1 is a schematic diagram of the assembly of the base, fixed platform, mounting block and locking device shown in the embodiment of the present application; Figure 8 yes Figure 7 A partial enlarged view of point A in the middle; Figure 9 yes Figure 7 sectional view of Figure 10 yes Figure 9 A partial enlarged view of point B in the middle.

[0019] Reference numerals: 1-base, 11-base, 12-first bracket, 13-second bracket, 14-main drive roller mounting frame, 15-pressure roller mounting frame, 2-first cutter device, 21-first cutter mounting seat, 211-arc groove, 22-first locker, 3-second cutter device, 31-base, 32-fixed platform, 33-mounting block, 34-second locker, 4-first drive device, 41-first drive member, 42-eccentric rotating shaft, 421-axis body, 422-eccentric shaft, 43-mounting seat, 44-roller bearing follower, 45-bearing, 46-speed reducer, 5-main drive roller, 6-traction pressure roller, 7-second drive member. DETAILED DESCRIPTION

[0020] The following describes embodiments of the present application in more detail with reference to the accompanying drawings. Although the accompanying drawings illustrate embodiments of the present application, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments described herein. Rather, these embodiments are provided to make the present application more thorough and complete, and to fully convey the scope of the present application to those skilled in the art.

[0021] It should be understood that although the terms "first", "second", "third", etc. may be used in this application to describe various information, this information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of this application, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0022] In the description of this application, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0023] Unless otherwise expressly specified or limited, the terms "mounted," "connected," "connect," "fixed," and the like should be interpreted broadly. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0024] In related technologies, the die-cutting assembly uses a motor plus a screw or a cylinder as a power source to rigidly connect with the cutter, and drives the cutter to perform the die-cutting action, thereby die-cutting the transmitted electrode material strip into sheets. The movement accuracy of the cutter will affect the quality of the die-cutting. However, at conventional production speeds, the solutions of related technologies can meet basic processing needs. However, as the industry's requirements for production efficiency increase, the die-cutting speed of the cutter needs to be increased. When running at high speeds, the cutter is affected by the vibration of the power source and resonates with the power source. The resonance of the mechanism can lead to an excessively high burr rate on the electrode cut, affecting the safety performance of the battery.

[0025] In response to the above problems, an embodiment of the present application provides a pole piece die-cutting assembly to solve the problem of excessively high pole piece cut burr rate due to mechanism resonance when the die-cutting speed is too fast.

[0026] The technical solutions of the embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0027] like Figures 1 to 6 As shown, an embodiment of the present application provides a pole piece die-cutting assembly, comprising a base 1, a cutting die set, and a first drive device 4. The cutting die set comprises a first cutting device 2 and a second cutting device 3, which are arranged in a vertically opposed relationship. The second cutting device 3 is provided on the base 1, and the first cutting device 2 and the base 1 are slidably connected in a vertical direction. During die-cutting, the second cutting device 3 remains stationary relative to the base 1, while the first cutting device 2 moves downward toward the second cutting device 3 to die-cut the pole piece strip.

[0028] The first driving device 4 is arranged on the base 1. The first driving device 4 includes a first driving member 41, an eccentric rotating shaft 42 and a mounting seat 43. The eccentric rotating shaft 42 includes a shaft body 421 and an eccentric shaft 422 arranged at one end of the shaft body 421. The eccentric shaft 422 is eccentrically arranged with respect to the shaft body 421, that is, the axis of the eccentric shaft 422 does not coincide with the axis of the shaft body 421. The shaft body 421 is rotatably arranged on the mounting seat 43. The mounting seat 43 is fixed to the base 1. The end of the shaft body 421 facing away from the eccentric shaft 422 is connected to the first driving member 41. The first driving member 41 can drive the shaft body 421 to rotate around its own axis.

[0029] Among them, the first cutter device 2 is provided with an arc-shaped groove 211 on the side facing the first driving device 4, and the end of the eccentric shaft 422 facing away from the shaft body 421 is located in the arc-shaped groove 211. The first driving member 41 is used to drive the eccentric rotating shaft 42 to rotate so that the eccentric shaft 422 can drive the first cutter device 2 to move up and down when moving along the arc-shaped groove 211.

[0030] The eccentric shaft 42 is driven to rotate relative to the mounting seat 43 by the first driving member 41, so that the eccentric shaft 422 swings in the arc groove 211. When the eccentric shaft 422 swings along the arc groove 211, it can drive the first cutter device 2 to move up and down, thereby completing the die-cutting of the pole piece strip; in the above scheme, the first driving member 41 and the first cutter device 2 are connected by the eccentric shaft 42 and the arc groove 211. Compared with the rigid connection method in the related technology, the vibration transmission efficiency of this non-rigid connection transmission method is lower, thereby weakening the resonance phenomenon between the first cutter device 2 and the first driving member 41, and then weakening the vibration of the first cutter device 2, ensuring the accuracy during high-speed die-cutting, and reducing the burr rate of the pole piece incision.

[0031] Specifically, the first driving member 41 drives the shaft body 421 to rotate around its own axis. When the shaft body 421 rotates, the eccentric shaft 422 is driven to rotate together, so that the eccentric shaft 422 swings around the axis of the shaft body 421. When the eccentric shaft 422 moves toward the midpoint of the arc-shaped groove 211, the first cutter device 2 is lifted upward. When the eccentric shaft 422 moves toward the end position of the arc-shaped groove 211, the first cutter device 2 is moved downward. When the eccentric shaft 422 swings back and forth in the arc-shaped groove 211, the first cutter device 2 is controlled to move back and forth up and down. The width of the arcuate groove 211 is greater than the diameter of the eccentric shaft 422. The eccentric shaft 422 contacts the upper wall of the arcuate groove 211, but has a certain gap with the lower wall of the arcuate groove 211. This means that the eccentric shaft 422 exerts a force on the upper wall of the arcuate groove 211, overcoming the gravity of the first cutter device 2 to perform work. The arc radius of the upper wall of the arcuate groove 211 is greater than the radius of the rotation path of the eccentric shaft 422. As a result, the upper wall of the arcuate groove 211 controls the rise and fall of the first cutter device 2 during the swinging of the eccentric shaft 422. A bearing 45 can be provided between the eccentric shaft 42 and the mounting seat 43. The eccentric shaft 42 is rotatably connected to the mounting seat 43 via the bearing 45 to reduce friction between the eccentric shaft 42 and the mounting seat 43.

[0032] In some embodiments, as Figure 5 As shown, a roller bearing follower 44 is provided at one end of the eccentric shaft 422 located within the arcuate groove 211. The outer wall of the roller bearing follower 44 abuts the inner wall of the arcuate groove 211. Specifically, the outer wall of the roller bearing follower 44 abuts the upper inner wall of the arcuate groove 211. When the eccentric shaft 422 swings, the roller bearing follower 44 moves back and forth along the upper inner wall of the arcuate groove 211, thereby controlling the up and down movement of the first cutter assembly 2. Providing the roller bearing follower 44 on the eccentric shaft 422 to abut the upper inner wall of the arcuate groove 211 reduces friction during relative motion between the eccentric shaft 422 and the arcuate groove 211.

[0033] In some embodiments, as Figure 1 、 Figures 3 to 6 As shown, the first driving device 4 further includes a reducer 46, and the first driving member 41 is a motor, which is connected to the shaft body 421 via the reducer 46. Specifically, the output shaft of the first driving member 41 coincides with the axis of the shaft body 421, and the vibration of the first driving member 41 is transmitted to the eccentric rotating shaft 42 via the reducer 46. The eccentric shaft 422 on the shaft body 421 and the arc-shaped groove 211 on the first cutter device 2 are non-rigidly connected, that is, the eccentric shaft 422 only abuts against the upper inner wall of the arc-shaped groove 211, and the efficiency of its vibration transmission is low. Therefore, the resonance between the first cutter device 2 and the first driving member 41 can be weakened, thereby reducing the vibration of the first cutter device 2.

[0034] In some embodiments, as Figures 1 to 3 As shown, the pole piece die-cutting assembly also includes a main drive roller 5 and a traction pressure roller 6 arranged opposite to each other in the upper and lower parts. The main drive roller 5 and the traction pressure roller 6 are both rotatably connected to the base 1, and the main drive roller 5 and the traction pressure roller 6 are both located on one side of the cutting die group; a second drive member 7 is provided at one end of the main drive roller 5, and the second drive member 7 is used to drive the main drive roller 5 to rotate.

[0035] During die-cutting, the pole piece strip passes between the main drive roller 5 and the traction pressure roller 6, the second drive member 7 drives the main drive roller 5 to rotate, and the traction pressure roller 6 abuts against the pole piece strip. Under the joint action of the main drive roller 5 and the traction pressure roller 6, the strip is transferred toward the cutting module, so that the pole piece strip moves between the first cutting device 2 and the second cutting device 3. When it moves a certain distance, the first cutting device 2 moves downward to die-cut the pole piece strip.

[0036] In some embodiments, as Figures 1 to 3 As shown, both the first driving member 41 and the second driving member 7 are motors, and the output shaft of the first driving member 41 is arranged perpendicularly to the output shaft of the second driving member 7. By arranging the output shafts of the first driving member 41 and the second driving member 7 perpendicularly, the main directions of the vibrations they generate are theoretically located in mutually perpendicular spatial dimensions. This orthogonal arrangement can misalign the directions of the excitation force vectors of the two vibration sources, avoiding the direct superposition of vibration energy in the same direction, thereby reducing the vibration coupling strength of the overall system and reducing the impact of vibration on the burr rate of the pole piece cutout.

[0037] In some embodiments, as Figures 1 to 5 As shown, the base 1 includes a base 11 and a first bracket 12 and a second bracket 13 respectively provided on the base 11 , the mounting seat 43 is provided on the first bracket 12 , and the second driving member 7 is provided on the second bracket 13 .

[0038] Specifically, the support base for supporting the first driving member 41 can be a component that is not externally connected to the base 1, so that the two power sources of the first driving member 41 and the second driving member 7 are installed in a separate manner to form a decoupling structure. The first driving member 41 and the second driving member 7 adopt an independently installed power decoupling structure, which can realize the spatial separation of the first driving member 41 and the second driving member 7, and combined with the non-rigid connection between the first driving member 41 and the first cutting device 2, the vibration transmission rate can be jointly reduced.

[0039] In the prior art, the die-cutting mechanism integrates the cutter drive motor and the main roller drive motor on top of the same fixed frame, resulting in an excessively high overall equipment height, which is not conducive to production line space planning and leads to vibration coupling. Furthermore, the rigid connection between the power source and the cutter can lead to excessive burr rates on the electrode cuts due to mechanism resonance at high die-cutting speeds, impacting battery safety performance. This embodiment overcomes the Z-direction spatial limitations of traditional mechanisms through a decoupling structure, reducing the equipment height. Furthermore, the non-rigid connection between the first drive member 41 and the first cutter device 2 reduces vibration transmission, thus meeting the high-speed production requirements of die-cutting equipment.

[0040] In some embodiments, as Figures 1 to 3 As shown, a main drive roller mounting frame 14 and a pressure roller mounting frame 15 are also provided on the base 11 . The main drive roller 5 is rotatably provided on the main drive roller mounting frame 14 , and the traction pressure roller 6 is rotatably provided on the pressure roller mounting frame 15 .

[0041] In some embodiments, the first driving member 41 is a servo motor, and the second driving member 7 is a DD motor.

[0042] In some embodiments, as Figures 1 to 3 As shown, the first cutter device 2 includes a first locking device 22, a first cutter mounting base 21, and a first cutter disposed at the lower end of the first cutter mounting base 21. The first cutter mounting base 21 is detachably connected to the first cutter via the first locking device 22. Specifically, first locking devices 22 are provided on both sides of the first cutter mounting base 21. During assembly and disassembly, the first cutter can be removed from the first cutter mounting base 21 or mounted on the first cutter mounting base 21 by driving the first locking devices 22 to open or close, thereby facilitating cutter replacement.

[0043] In some embodiments, as Figures 7 to 10 As shown, the second cutter device 3 includes a base 31, a fixed platform 32, a mounting block 33, a second locker 34 and a second cutter. The base 31 is connected to the base 1, and the mounting block 33 is detachably connected to the base 31 through the second locker 34. The mounting block 33 abuts against the fixed platform 32 so that the fixed platform 32 is limited on the base 31, and the second cutter is arranged on the fixed platform 32.

[0044] Specifically, both ends of the base 31 are provided with a second locker 34 and a mounting block 33, the lower surface of the fixed platform 32 is in contact with the upper surface of the base 31, the second cutter is provided on the upper surface of the fixed platform 32, and the mounting blocks 33 on the left and right sides lock the fixed platform 32 to the base 31, wherein, as Figure 8 and Figure 10As shown, the mounting block 33 and the fixed platform 32 are respectively provided with matching inclined surfaces, thereby locking the fixed platform 32. During disassembly, the second locking device 34 can be driven to open, the mounting block 33 can be removed from the base 31, and then the fixed platform 32 can be separated from the base 31. The new second cutter together with the fixed platform 32 can be placed on the base 31. The mounting blocks 33 on both sides are then installed on the base 31. The second locking device 34 is locked so that the mounting block 33 clamps the fixed platform 32 to the base 31, and the cutter replacement is completed.

[0045] In the related art, when replacing the cutter, the first cutter device 2 or the second cutter device 3 needs to be completely disassembled before the cutter can be replaced. A single cutter change takes a very long time. This embodiment realizes modular disassembly and assembly through a locker, replacing the traditional multi-bolt splicing structure, and realizes "plug and play" maintenance of the tool system through the modular locking structure.

[0046] In some embodiments, the first locker 22 and the second locker 34 are both knob-type wedge-shaped lockers for easy operation.

[0047] In summary, the pole piece die-cutting assembly provided in the embodiment of the present application is suitable for high-speed die-cutting conditions in a pole piece cutting and stacking machine, meets the requirements of improved structural stability and rapid tool change, has the advantages of high concentration, low vibration transmission and support for rapid tool change, and achieves low burr rate and rapid maintenance of cutters under high-speed die-cutting through the power system decoupling design and modular assembly structure, which can meet the high-speed production requirements of die-cutting equipment.

[0048] The scheme of the present application has been described in detail above with reference to the accompanying drawings. In the above embodiments, the descriptions of each embodiment have their own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments. Those skilled in the art should also be aware that the actions and modules involved in the description are not necessarily required for this application. In addition, it is understood that the steps in the method of the embodiment of the present application can be adjusted in sequence, merged and deleted according to actual needs, and the modules in the device of the embodiment of the present application can be merged, divided and deleted according to actual needs.

[0049] The embodiments of the present application have been described above. The above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is selected to best explain the principles of the embodiments, their practical applications, or improvements to the technology in the market, or to enable other persons skilled in the art to understand the embodiments disclosed herein.

Claims

1. A pole piece die-cutting assembly, characterized in that: include: matrix; The cutting module comprises a first cutting device and a second cutting device, wherein the first cutting device and the second cutting device are arranged opposite to each other, the second cutting device is arranged on the base, and the first cutting device is slidably connected to the base; a first driving device, disposed on the base, comprising a first driving member, an eccentric rotating shaft, and a mounting seat, wherein the eccentric rotating shaft comprises a shaft body and an eccentric shaft disposed at one end of the shaft body, the eccentric shaft being eccentrically disposed relative to the shaft body, the shaft body being rotatably disposed on the mounting seat, and an end of the shaft body facing away from the eccentric shaft being connected to the first driving member; In which, the first cutter device is provided with an arc-shaped groove on the side facing the first driving device, and the end of the eccentric shaft away from the shaft body is located in the arc-shaped groove, and the first driving member is used to drive the eccentric shaft to rotate so that the eccentric shaft can drive the first cutter device to move when moving along the arc-shaped groove.

2. The pole piece die-cutting assembly according to claim 1, characterized in that: A roller bearing follower is provided at one end of the eccentric shaft located in the arc-shaped groove, and the outer wall of the roller bearing follower abuts against the inner wall of the arc-shaped groove.

3. The pole piece die-cutting assembly according to claim 1, characterized in that: The first driving device further includes a reducer, the first driving member is a motor, and the first driving member is connected to the shaft through the reducer.

4. The pole piece die-cutting assembly according to claim 1, characterized in that: It also includes a main drive roller and a traction pressure roller that are arranged opposite to each other, the main drive roller and the traction pressure roller are both rotatably connected to the base, and the main drive roller and the traction pressure roller are both located on one side of the cutting die assembly; A second driving member is provided at one end of the main driving roller, and the second driving member is used to drive the main driving roller to rotate.

5. The pole piece die-cutting assembly according to claim 4, characterized in that: The first driving member and the second driving member are both motors, and the output shaft of the first driving member is arranged perpendicular to the output shaft of the second driving member.

6. The pole piece die-cutting assembly according to claim 5, characterized in that: The base includes a base and a first bracket and a second bracket respectively arranged on the base, the mounting seat is arranged on the first bracket, and the second driving member is arranged on the second bracket.

7. The pole piece die-cutting assembly according to claim 5, characterized in that: The first driving component is a servo motor, and the second driving component is a DD motor.

8. The pole piece die-cutting assembly according to claim 1, characterized in that: The first cutter device includes a first locker, a first cutter mounting seat and a first cutter provided on the first cutter mounting seat. The first cutter mounting seat is detachably connected to the first cutter via the first locker.

9. The pole piece die-cutting assembly according to claim 8, characterized in that: The second cutter device includes a base, a fixed platform, a mounting block, a second locker and a second cutter. The base is connected to the base, the mounting block is detachably connected to the base through the second locker, the mounting block abuts against the fixed platform to limit the fixed platform to the base, and the second cutter is arranged on the fixed platform.

10. The pole piece die-cutting assembly according to claim 9, characterized in that: The first locker and the second locker are both knob-type wedge-shaped lockers.

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