A pole piece cutting device

Abstract

The present invention relates to a pole piece cutting device, belonging to the technical field of lithium battery manufacturing. The pole piece cutting device includes a driving mechanism, a transmission mechanism, a cutting tool mechanism and a mounting frame, wherein: The driving mechanism includes a driving member and an eccentric wheel assembly. The fixed end of the driving member is fixedly connected to the upper mounting plate of the mounting frame, and the movable end of the driving member is equipped with an eccentric wheel assembly. The driving member drives the eccentric wheel assembly to rotate; The first end of the transmission mechanism is connected to the eccentric wheel assembly, and the second end of the transmission mechanism is fixedly connected to the cutting tool mechanism; The cutting tool mechanism reciprocates along the conveying direction of the pole piece under the drive of the driving member. Through the cooperation of the driving member and the eccentric wheel assembly, the cutting tool assembly is driven to move synchronously in the vertical and front-back directions, and the continuously conveyed pole piece can be cut off by one driving member.

Description

Technical Field

[0001] The present invention relates to a sheet making machine in lithium battery production equipment, and more specifically to a pole piece cutting device. Background Art

[0002] In the existing process, when cutting the pole piece, the pole piece must stop the conveying movement. Otherwise, it will cause the subsequent pole piece to bulge and deform, affecting the quality of the pole piece for the next cutting. Therefore, the relevant conveying mechanism has to stop and start periodically. Stopping the conveying of the pole piece will inevitably lead to a reduction in the efficiency of cutting the pole piece.

[0003] In order to improve efficiency and achieve continuous cutting, the existing solution is to set a driving member to drive the upper cutting knife to move up and down to achieve cutting, and another driving member to drive the cutting knife assembly to move horizontally back and forth, so that when cutting the pole piece, the cutting knife can remain relatively stationary with the pole piece in the horizontal direction, realizing the uninterrupted conveying of the pole piece. However, the above technical solution requires two driving members to achieve the chasing cutting of the pole piece, the movement process is complex, the probability of failure increases, and when maintenance is required, there are also problems such as cumbersome operation and poor movement stability. Summary of the Invention

[0004] The present invention aims at the problems of the existing pole piece cutting device, and provides a pole piece cutting device with simple and reliable structure and high cutting efficiency.

[0005] The technical solution of the pole piece cutting device in the present invention is as follows:

[0006] A pole piece cutting device includes a driving mechanism, a transmission mechanism, a cutting knife mechanism and a mounting rack. Among them: the driving mechanism includes a driving member and an eccentric wheel assembly. The fixed end of the driving member is fixedly connected to the upper mounting plate of the mounting rack, and the movable end of the driving member is installed with an eccentric wheel assembly. The driving member is configured to drive the eccentric wheel assembly to rotate; the first end of the transmission mechanism is connected to the eccentric wheel assembly, and the second end of the transmission mechanism is fixedly connected to the cutting knife mechanism; the cutting knife mechanism includes an upper cutting knife assembly and a lower cutting knife assembly. The upper cutting knife assembly is fixedly connected to the transmission mechanism, and the upper cutting knife assembly is configured to lift under the drive of the driving member. The lower cutting knife assembly is slidably installed on the lower mounting plate of the mounting rack, and the cutting knife mechanism is further configured to reciprocate along the conveying direction of the pole piece under the drive of the driving member.

[0007] Through the cooperation of the driving member and the eccentric wheel assembly, the cutting knife assembly is driven to move synchronously in the up-and-down and front-and-back directions, and the continuously conveyed pole piece can be cut off by one driving member.

[0008] Optionally, the transmission mechanism includes a transmission rod and a connecting block. The eccentric wheel assembly includes a boss. A limiting hole is provided at the first end of the transmission rod. The boss is rotatably connected to the limiting hole. The second end of the transmission rod is fixedly connected to the connecting block, and the connecting block is detachably installed on the upper cutting knife assembly.

[0009] Through the cooperation of the eccentric wheel assembly and the transmission rod, the structure is simple and the transmission effect is good.

[0010] Optionally, the upper cutting knife assembly includes a limiting block, and a limiting portion is formed at the upper end of the limiting block. The transmission mechanism further includes a pair of first guide wheel assemblies. Each first guide wheel assembly includes a first mounting portion and a first guide wheel with a vertically arranged axis. The first end of the first mounting portion is mounted on the connecting block, and the first guide wheel is mounted on the second end of the first mounting portion; the first guide wheels are arranged on both sides of the limiting portion and are tangent to the limiting portion.

[0011] The first guide wheel assembly and the limiting block are cooperatively arranged, which can not only limit the upper cutting knife assembly in the conveying direction of the pole piece, but also retain mobility in the direction perpendicular to the conveying direction of the pole piece.

[0012] Optionally, the pole piece cutting device further includes a first support plate and a second support plate arranged at a vertical interval, as well as a sliding plate and a first sliding mechanism. The sliding plate is configured to carry the cutting knife mechanism. The first sliding mechanism includes a first slider and a first guide rail. The first guide rail is fixedly installed on the lower mounting plate along the conveying direction of the pole piece. The sliding plate is slidably connected to the first guide rail through the first slider; the first support plate and the second support plate are respectively installed on the sliding plate, and the cutting knife mechanism is located between the first support plate and the second support plate.

[0013] The design of the sliding plate and the first sliding mechanism enables the cutting knife mechanism to move smoothly in the conveying direction of the pole piece.

[0014] Optionally, the pole piece cutting device further includes a second sliding mechanism. The second sliding mechanism includes a second sliding rail, a second slider, a second slider mounting block, and a second guide wheel assembly. Among them: a cross beam plate is arranged between the first support plate and the second support plate. The first end of the cross beam plate is fixed at the top of the first support plate, and the second end of the cross beam plate is fixed at the top of the second support plate; each second guide wheel assembly includes a second mounting portion and a second guide wheel with a horizontally arranged axis. The first end of the second mounting portion is mounted on the cross beam plate, and the second guide wheel is mounted on the second end of the second mounting portion; the second sliding rail is fixedly installed on the upper mounting plate of the mounting frame. The second slider mounting block is slidably connected to the second sliding rail through the second slider. The second slider mounting block is configured with a guide groove for accommodating the second guide wheel. One end of the second guide wheel is tangent to the edge of the guide groove and is configured to rotate in the guide groove; the second sliding mechanism is in two groups and is symmetrically located on both sides of the connecting block respectively.

[0015] By designing the second sliding mechanism, the upper end and the lower end of the cutting knife mechanism are synchronously translated along the conveying direction of the pole piece.

[0016] Optionally, the pole piece cutting device further includes a third sliding mechanism, which includes a third slide rail and a third slider. The third slide rail is vertically installed on the first support plate or the second support plate. The first end of the third slider is slidably connected to the third slide rail, and the second end of the third slider is fixedly connected to the connecting block.

[0017] By providing the third sliding mechanism, the upper cutter assembly is ensured to move smoothly in the vertical direction.

[0018] Optionally, the pole piece cutting device further includes a jacking mechanism, which includes a jacking plate, a jacking rod and a jacking cylinder. Specifically: the fixed end of the jacking cylinder is fixedly connected to the sliding plate, the movable end of the jacking cylinder is fixedly connected to the jacking plate, one end of the jacking rod is fixedly installed on the jacking plate, the other end of the jacking rod is provided with a ball, and the sliding plate is provided with a through hole for the jacking rod to pass through. The jacking cylinder drives the jacking rod to move towards the sliding plate, so that the ball abuts against the lower surface of the cutter mechanism through the through hole; the jacking cylinder also drives the jacking rod to descend until the ball disengages from the lower surface of the cutter mechanism.

[0019] By providing the jacking mechanism, it is convenient to move the cutter mechanism out from the side to facilitate the replacement of the cutter mechanism.

[0020] Optionally, the pole piece cutting device further includes a limit bolt. One end of the limit bolt is installed on the first support plate or the second support plate, and the other end of the limit bolt is provided with a hemispherical pushing top surface, and the pushing top surface abuts against the cutter mechanism.

[0021] The position of the cutter mechanism is adjusted by the limit bolt, and the debugging method is simple and the effect is good.

[0022] Optionally, the cutter mechanism further includes a guide rod and a spring. The lower end of the guide rod is fixedly connected to the lower cutter assembly, and the upper cutter assembly is sleeved on the upper end of the guide rod and is configured to be slidable and liftable on the guide rod; the spring is sleeved on the guide rod, one end of the spring abuts against the upper cutter assembly, and the other end of the spring abuts against the lower cutter assembly.

[0023] The design of the guide rod and the spring makes the upper cutter assembly more stable during the downward movement process.

[0024] Optionally, the pole piece cutting device further includes a guiding mechanism, which is configured to guide the uncut pole piece into the cutter mechanism; the guiding assembly includes an upper guiding plate and a lower guiding plate arranged up and down, and a guiding gap for the pole piece to pass through is formed between the upper guiding plate and the lower guiding plate.

[0025] By providing the guiding mechanism, the pole piece is stably input into the cutter mechanism for cutting. Description of the Drawings

[0026] Figure 1 It is a schematic three-dimensional structure diagram of a pole piece cutting device according to an optional embodiment of the invention;

[0027] Figure 2 It is a schematic diagram of the internal structure of the pole piece cutting device;

[0028] Figure 3 It is a schematic diagram of the internal structure of the pole piece cutting device;

[0029] Figure 4 It is a schematic diagram of the installation relationship between the transmission component and the cutting tool mechanism;

[0030] Figure 5 It is a schematic diagram of the structure of the cutting tool mechanism and the jacking mechanism;

[0031] Figure 6 It is a schematic diagram of the structure of the pressing component. Specific embodiments

[0032] To make the above objects, features, and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0033] During the manufacturing process of lithium battery cells, it is necessary to cut the wound pole piece tape into pole pieces with a fixed width after shaping. In the existing cutting process, usually, the pole piece tape is cut by a cutting tool, and during cutting, the pole piece tape stops being transported. Otherwise, it will cause the subsequent pole pieces to bulge and deform, affecting the quality of the pole pieces for the next cutting. Therefore, the relevant conveying mechanism needs to stop and start periodically. Stopping the transportation of the pole pieces will inevitably lead to a reduction in the efficiency of cutting the pole pieces. To improve efficiency and achieve continuous cutting, the existing solution is to set a driving member to drive the upper cutting tool to move up and down to achieve cutting, and another driving member to drive the cutting tool assembly to move horizontally back and forth, so that when cutting the pole pieces, the cutting tool can remain relatively stationary in the horizontal direction with the pole pieces to achieve uninterrupted transportation of the pole pieces. However, the above technical solution requires two driving members to achieve chasing cutting of the pole pieces, the movement process is complex, the probability of failure increases, and when maintenance is required, there are also problems such as cumbersome operation and poor movement stability.

[0034] In view of this, the present invention provides a pole piece cutting device that drives the cutting tool assembly through one driving member to synchronously complete cutting during the transportation of the pole pieces. As Figure 1 and Figure 2As shown in the figure, a pole piece cutting device provided by the present application includes a mounting frame 1, a driving mechanism 2, a transmission mechanism 3 and a cutting tool mechanism 4, where: The driving mechanism 2 includes a driving member 21 and an eccentric wheel assembly 22. The fixed end of the driving member 21 is fixedly connected to the upper mounting plate 11 of the mounting frame 1, and the movable end of the driving member 21 is equipped with the eccentric wheel assembly 22. The driving member 21 is configured to drive the eccentric wheel assembly 22 to rotate; The first end of the transmission mechanism 3 is connected to the eccentric wheel assembly 22, and the second end of the transmission mechanism 3 is fixedly connected to the cutting tool mechanism 4; The cutting tool mechanism 4 includes an upper cutting tool assembly 41 and a lower cutting tool assembly 42. The upper cutting tool assembly 41 is fixedly connected to the transmission mechanism 3. The upper cutting tool assembly 41 is configured to move up and down under the drive of the driving member 21, and the cutting tool mechanism 42 is also configured to reciprocate in the conveying direction of the pole piece under the drive of the driving member 21. Optionally, the driving member 21 is a servo motor or a DD motor. Through the cooperation of the driving member 21 and the eccentric wheel assembly 22, the circular motion of the motor is decomposed into motions in the up-down and front-back directions to drive the cutting tool mechanism 4 to move synchronously in the up-down and front-back directions. The continuously conveyed pole piece can be cut off by one driving member, realizing the uninterrupted conveying of the pole piece.

[0035] As Figure 2 shown, in an implementable embodiment, the pole piece cutting device further includes a first support plate a and a second support plate b arranged at a vertical interval, as well as a sliding plate c and a first sliding mechanism d. The sliding plate c is configured to carry the cutting tool mechanism 4. The first sliding mechanism d includes a first slider and a first guide rail. The first guide rail is fixedly installed on the lower mounting plate 12 along the conveying direction of the pole piece. The sliding plate c is slidably connected to the first guide rail through the first slider; The first support plate a and the second support plate b are respectively installed on the sliding plate c, and the cutting tool mechanism 4 is located between the first support plate a and the second support plate b. The design of the sliding plate c and the first sliding mechanism d enables the cutting tool mechanism 4 to move smoothly in the conveying direction of the pole piece.

[0036] Optionally, the pole piece cutting device further includes a second sliding mechanism e, and the second sliding mechanism e includes a second slide rail, a second slider, a second slider mounting block, and a second guide wheel assembly, where: a cross beam plate f is provided between the first support plate a and the second support plate b, the first end of the cross beam plate f is fixed to the top end of the first support plate a, and the second end of the cross beam plate f is fixed to the top end of the second support plate b; each second guide wheel assembly includes a second mounting portion and a second guide wheel with a horizontally arranged axis, the first end of the second mounting portion is mounted on the cross beam plate f, and the second guide wheel is mounted on the second end of the second mounting portion; the second slide rail is fixedly installed on the upper mounting plate 11 of the mounting frame 1, the second slider mounting block is slidably connected to the second slide rail through the second slider, the second slider mounting block is configured with a guide groove for accommodating the second guide wheel, one end of the second guide wheel is tangent to the edge of the guide groove and is configured to rotate in the guide groove; the second sliding mechanism e is in two groups and is symmetrically located on both sides of the connecting block respectively. By designing the second sliding mechanism e, the upper end and the lower end of the cutting knife mechanism 4 are translated synchronously along the conveying direction of the pole piece. The design of the cross beam plate f enables the cutting knife mechanism 4 and the mounting frame 1 to be well integrated into a whole, making the cutting knife mechanism 4 more stable during the cutting process.

[0037] In this embodiment, the pole piece cutting device further includes a third sliding mechanism g, and the third sliding mechanism g includes a third slide rail and a third slider. The third slide rail is vertically installed on the first support plate a or the second support plate b, the first end of the third slider is slidably connected to the third slide rail, and the second end of the third slider is fixedly connected to the connecting block. By providing the third sliding mechanism g, the upper cutting knife assembly 41 is ensured to achieve stable lifting and lowering in the vertical direction.

[0038] In an implementable embodiment, the transmission mechanism 3 includes a transmission rod 31 and a connecting block 32, the eccentric wheel assembly 22 includes a convex platform, a limiting hole is provided at the first end of the transmission rod 31, the convex platform is rotatably connected to the limiting hole, the second end of the transmission rod 31 is fixedly connected to the connecting block 32, and the connecting block 32 is detachably installed on the upper cutting knife assembly 41. When it is necessary to replace the cutting knife assembly 4, the connecting piece (such as a bolt) installed between the upper cutting knife assembly 41 and the connecting block 32 needs to be removed.

[0039] As Figure 4As shown, in an achievable implementation, the upper cutting blade assembly 41 includes a limiting block 411. A limiting portion is formed at the upper end of the limiting block 411. The transmission mechanism 3 further includes a pair of first guide wheel assemblies 33. Each first guide wheel assembly 33 includes a first mounting portion and a first guide wheel with a vertically arranged axis. The first end of the first mounting portion is mounted on the connecting block 32, and the first guide wheel is mounted on the second end of the first mounting portion. The first guide wheels are arranged on both sides of the limiting portion and are tangent to the limiting portion. The first guide wheel assembly 33 and the limiting block 411 are cooperatively arranged, which can not only limit the upper cutting blade assembly 41 in the conveying direction of the pole piece, but also retain mobility in the direction perpendicular to the pole piece conveying direction. In this embodiment, the connecting block 32 is an "I"-shaped fixing block, and fixing holes for fixing the first mounting portion are formed in the connecting block 32. Optionally, the limiting block 411 is designed as a T-shaped block. The horizontal long side is used to connect with the upper end of the upper cutting blade assembly 41, and the vertical side is the limiting portion, which is clamped between the first guide wheels of the same group.

[0040] In this embodiment, the first guide wheel assembly 33 is used to buffer the impact force feedback from the upper cutting blade assembly 41, reduce the damage of the upper cutting blade assembly 41 to its own components during rapid reciprocating motion, extend the working life of the components, and reduce processing errors.

[0041] The connecting block 411 makes a circular motion driven by the eccentric wheel assembly 22. The circular motion of the connecting block 411 drives the overall horizontal sliding of the cutting die and the vertical lifting of the upper cutting blade assembly 41 relative to the lower cutting blade assembly 42, realizing the chasing cutting action. During the working process, it is necessary to rely on the controller to control the mechanism to move horizontally at a constant speed, which is the same as the feeding speed of the pole piece, that is: v 水平 = RW cos θ, where R is the circumferential radius (i.e., the eccentricity) of the output end of the eccentric wheel, W is the angular velocity of the output end of the eccentric wheel, and θ is the angle between the radial tangent of the output end of the eccentric wheel and the horizontal direction. Also refer to Figure 3 and Figure 5 In an achievable implementation, the pole piece cutting device further includes a jacking mechanism 5. The jacking mechanism 5 includes a jacking plate 51, a jacking rod 52, and a jacking cylinder 53. Among them: the fixed end of the jacking cylinder 53 is fixedly connected to the sliding plate c, the movable end of the jacking cylinder 53 is fixedly connected to the jacking plate 51, one end of the jacking rod 52 is fixedly installed on the jacking plate 51, a ball 53 is arranged at the other end of the jacking rod 52, and a through hole for the jacking rod 52 to pass through is arranged on the sliding plate c. The jacking cylinder 53 drives the jacking rod 52 to move towards the sliding plate c, so that the ball 53 abuts against the lower surface of the cutting blade mechanism 4 through the through hole; the jacking cylinder 53 also drives the jacking rod 52 to descend until the ball 53 disengages from the lower surface of the cutting blade mechanism 4. By setting the jacking mechanism 5, it is convenient to move the cutting blade mechanism 4 out from the side for replacing the cutting blade mechanism 4.

[0042] Since the cutting efficiency of the pole piece cutting device involved in this application is high, the cutting tool mechanism 4 needs to be replaced and maintained every three to four days. When the cutting tool mechanism needs to be replaced, first separate the connecting block 32 from the limiting block 411, the lifting cylinder 53 moves to lift the cutting tool mechanism 4, and the operator pulls out the cutting tool mechanism to be replaced from the side. Similarly, push the new cutting tool assembly into the mounting bracket, the lifting cylinder 53 descends, place the new cutting tool mechanism on the sliding plate c, and then the operator connects the connecting block 32 with the limiting block 411 to achieve the effect of replacing the cutting tool mechanism 4. The number of bolts that need to be loosened during the whole process is small, the replacement is convenient, and the operation is simple.

[0043] Optionally, the pole piece cutting device further includes a limiting bolt h. One end of the limiting bolt h is installed on the first support plate a or the second support plate b, and the other end of the limiting bolt h is provided with a hemispherical pushing top surface, and the pushing top surface abuts against the cutting tool mechanism 4. The limiting bolt h limits the possibility of the cutting tool mechanism 4 displacing left and right relative to the sliding plate c, ensuring the stability of the cutting tool during the pole piece cutting process. The position of the cutting tool mechanism 4 can also be adjusted through the limiting bolt h, and the debugging method is simple and the effect is good. The design of the hemispherical pushing top surface can also effectively offset the influence of inertial impact.

[0044] As Figure 4 shown, in this embodiment, the cutting tool mechanism 4 further includes a guide rod 43 and a spring 44. The lower end of the guide rod 43 is fixedly connected to the lower cutting tool assembly 42, and the upper cutting tool assembly 41 is sleeved on the upper end of the guide rod 43 and is configured to be slidable up and down on the guide rod 43; the spring 44 is sleeved on the guide rod 43, one end of the spring 44 abuts against the upper cutting tool assembly 41, and the other end of the spring 44 abuts against the lower cutting tool assembly 42. Through the design of the guide rod 43 and the spring 44, the upper cutting tool assembly 41 is more stable during the downward movement process.

[0045] Referring again to Figure 1 , optionally, the pole piece cutting device further includes a guiding mechanism 6, and the guiding mechanism 6 is configured to guide the uncut pole piece into the cutting tool mechanism 4; the guiding mechanism 6 includes an upper guiding plate and a lower guiding plate arranged up and down, and a guiding gap for the pole piece to pass through is formed between the upper guiding plate and the lower guiding plate. By arranging the guiding mechanism, the pole piece is stably input into the cutting tool mechanism for cutting.

[0046] As Figure 6As shown, in an achievable implementation, the pole piece cutting device further includes a pressing component 7, which is configured to press the uncut pole piece and transfer the cut pole piece to the subsequent process. The pressing component 7 includes an upper pressing plate 71, an elastic guide rod 72, and a lower pressing plate 73, where: the lower pressing plate 71 is fixedly installed on the lower cutting tool assembly 42 and is located below the upper pressing plate 71; the first end of the elastic guide rod 72 is fixedly connected to the upper pressing plate 71, and the second end of the elastic guide rod 72 is fixedly connected to the transmission mechanism 3; the upper pressing plate 71 is configured to move closer to and away from the lower pressing plate 73, and the elastic guide rod 72 is configured to contract in the moving direction of the upper pressing plate 71. Optionally, the elastic guide rod 72 is a buffer. During the pole piece cutting process, when the upper cutting tool assembly 41 descends, the upper pressing plate 71 first contacts the pole piece and continues to descend. The elastic guide rod 72 contracts and at the same time the elastic guide rod 72 provides a downward elastic force to the upper pressing plate 71, so that the upper pressing plate 71 presses the pole piece against the lower pressing plate 73, and then continues to descend until the upper cutting tool and the lower cutting tool are butted to complete the cutting of the pole piece. After the pole piece cutting is completed, the upper cutting tool assembly 41 ascends, the upper cutting tool and the lower cutting tool are first separated, then the elastic guide rod 72 returns to its original position, and finally the upper pressing plate 71 and the lower pressing plate 73 are separated. The design of pressing the pole piece by the upper pressing plate 71 and the lower pressing plate 73 before cutting the pole piece can ensure that the pole piece does not move when the upper cutting tool and the lower cutting tool cut the pole piece, improving the cutting accuracy and quality.

[0047] In this embodiment, a dust removal groove is provided on the lower pressing plate 73. The dust removal groove is arranged in the direction of the lower cutting tool assembly 42 and is configured to suck out the sundries generated during cutting. The dust removal groove is connected to an external air source and functions to suck air, used to suck out the sundries generated during cutting, which can not only ensure the cleanliness of the equipment but also avoid the sundries affecting the cutting effect.

[0048] The above has described the present invention in sufficient detail with a certain particularity. Those of ordinary skill in the art should understand that the description in the embodiments is only exemplary, and all changes made without departing from the true spirit and scope of the present invention should fall within the protection scope of the present invention. The scope of protection required by the present invention is defined by the claims described, rather than by the above description in the embodiments.

Claims

1. A pole piece cutting device, characterized in that, The pole piece cutting device includes a driving mechanism, a transmission mechanism, a cutting tool mechanism and a mounting rack, where: The driving mechanism includes a driving member and an eccentric wheel assembly. The fixed end of the driving member is fixedly connected to the upper mounting plate of the mounting rack, and the movable end of the driving member is equipped with the eccentric wheel assembly. The driving member is configured to drive the eccentric wheel assembly to rotate; The first end of the transmission mechanism is connected to the eccentric wheel assembly, and the second end of the transmission mechanism is fixedly connected to the cutting tool mechanism; The cutting tool mechanism includes an upper cutting tool assembly and a lower cutting tool assembly. The upper cutting tool assembly is fixedly connected to the transmission mechanism and is configured to move up and down under the drive of the driving member. The lower cutting tool assembly is slidably mounted on the lower mounting plate of the mounting rack, and the cutting tool mechanism is also configured to reciprocate along the conveying direction of the pole piece under the drive of the driving member; The transmission mechanism includes a transmission rod and a connecting block. The eccentric wheel assembly includes a boss. A limiting hole is provided at the first end of the transmission rod, and the boss is rotatably connected to the limiting hole. The second end of the transmission rod is fixedly connected to the connecting block, and the connecting block is detachably mounted on the upper cutting tool assembly; The pole piece cutting device further includes a first support plate and a second support plate arranged at a vertical interval, as well as a sliding plate and a first sliding mechanism. The sliding plate is configured to carry the cutting tool mechanism. The first sliding mechanism includes a first slider and a first guide rail. The first guide rail is fixedly installed on the lower mounting plate along the conveying direction of the pole piece, and the sliding plate is slidably connected to the first guide rail through the first slider; The first support plate and the second support plate are respectively mounted on the sliding plate, and the cutting tool mechanism is located between the first support plate and the second support plate; The pole piece cutting device further includes a second sliding mechanism. The second sliding mechanism includes a second slide rail, a second slider and a second slider mounting block, where: A cross beam plate is arranged between the first support plate and the second support plate. The first end of the cross beam plate is fixed to the top of the first support plate, and the second end of the cross beam plate is fixed to the top of the second support plate; The second slide rail is fixedly installed on the upper mounting plate of the mounting rack, and the second slider mounting block is slidably connected to the second slide rail through the second slider; The pole piece cutting device further includes a third sliding mechanism. The third sliding mechanism includes a third slide rail and a third slider. The third slide rail is vertically installed on the first support plate or the second support plate. The first end of the third slider is slidably connected to the third slide rail, and the second end of the third slider is fixedly connected to the connecting block.

2. The pole piece cutting device according to claim 1, characterized in that, The upper cutting tool assembly includes a limiting block, and a limiting portion is formed at the upper end of the limiting block. The transmission mechanism further includes a pair of first guide wheel assemblies. Each first guide wheel assembly includes a first mounting portion and a first guide wheel with a vertical axis. The first end of the first mounting portion is mounted on the connecting block, and the first guide wheel is mounted on the second end of the first mounting portion; The first guide wheels are arranged on both sides of the limiting portion and are tangent to the limiting portion.

3. The pole piece cutting device according to claim 1, characterized in that, The pole piece cutting device further includes a second guide wheel assembly. Each second guide wheel assembly includes a second mounting portion and a second guide wheel with a horizontally arranged axis. The first end of the second mounting portion is mounted on the cross beam plate, and the second guide wheel is mounted on the second end of the second mounting portion; The second slider mounting block is configured with a guide groove for accommodating the second guide wheel. One end of the second guide wheel is tangent to the edge of the guide groove and is configured to rotate in the guide groove; There are two groups of the second sliding mechanisms, which are symmetrically located on both sides of the connecting block respectively.

4. The pole piece cutting device according to claim 1 or 2, characterized in that, The pole piece cutting device further includes a jacking mechanism. The jacking mechanism includes a jacking plate, a jacking rod and a jacking cylinder, where: The fixed end of the jacking cylinder is fixedly connected to the sliding plate, the movable end of the jacking cylinder is fixedly connected to the jacking plate, one end of the jacking rod is fixedly installed on the jacking plate, the other end of the jacking rod is provided with a ball, and a through hole for the jacking rod to pass through is provided on the sliding plate. The jacking cylinder drives the jacking rod to move towards the sliding plate, so that the ball abuts against the lower surface of the cutting tool mechanism through the through hole; the jacking cylinder also drives the jacking rod to descend until the ball disengages from the lower surface of the cutting tool mechanism.

5. The pole piece cutting device according to claim 1, wherein, The pole piece cutting device further includes a limit bolt. One end of the limit bolt is installed on the first support plate or the second support plate, and the other end of the limit bolt is provided with a hemispherical pushing top surface, and the pushing top surface abuts against the cutting tool mechanism.

6. The pole piece cutting device according to claim 1, characterized in that, The cutting tool mechanism further includes a guide rod and a spring. The lower end of the guide rod is fixedly connected to the lower cutting tool assembly, and the upper cutting tool assembly is sleeved on the upper end of the guide rod and is configured to be slidable up and down on the guide rod; The spring is sleeved on the guide rod. One end of the spring abuts against the upper cutting tool assembly, and the other end of the spring abuts against the lower cutting tool assembly.

7. The pole piece cutting device according to claim 1, characterized in that The pole piece cutting device further includes a guiding mechanism, which is configured to guide the uncut pole piece into the cutting tool mechanism; The guiding mechanism includes an upper guiding plate and a lower guiding plate arranged up and down. A guiding gap for the pole piece to pass through is formed between the upper guiding plate and the lower guiding plate.

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