Cutting mechanism and cutting device

Abstract

The utility model provides a cutting mechanism and a cutting device.The cutting mechanism is used for cutting a pole piece material thermally compounded with a diaphragm and comprises a base, a pressing assembly arranged above the base and a cutting assembly arranged on the pressing assembly. The pressing assembly is provided with a pressing piece capable of descending to press the pole piece material; the cutting assembly comprises a first driving part movably arranged on the pressing piece in the length direction of the base and a rotary cutter arranged on a driving shaft of the first driving part, and the rotary cutter can be driven by the first driving part to rotationally cut the pole piece materials. The cutting mechanism has the effect of improving the utilization rate of the cutting mechanism.

Description

Technical Field

[0001] This utility model relates to the field of cutting equipment technology, and in particular to a cutting mechanism. It also relates to a cutting device having the cutting mechanism. Background Technology

[0002] In the manufacturing process of lithium-ion batteries, there is a separator cutting step where the upper and lower separators are unwound simultaneously. The negative electrode sheet is inserted between the two separators, and the two separators are continuously hot-pressed to laminate the negative electrode sheet between them. After lamination, the laminated electrode sheet needs to be cut into individual electrode sheets.

[0003] In related technologies, when cutting the composite diaphragm, the diaphragm cutter is often heated to achieve the cutting of the diaphragm. During the heating process, the diaphragm cutter is prone to burns. At the same time, the diaphragm cutter is in contact with the diaphragm for a long time while heated, which can cause the diaphragm to stick to the surface of the diaphragm cutter and dull the diaphragm cutter, resulting in a low utilization rate of the cutting mechanism. Utility Model Content

[0004] In view of this, the present invention aims to provide a cutting mechanism to improve the operating rate of the cutting mechanism.

[0005] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0006] A cutting mechanism for cutting thermally bonded diaphragm electrode sheets;

[0007] The cutting mechanism includes a base, a clamping assembly disposed above the base, and a cutting assembly disposed on the clamping assembly;

[0008] The clamping assembly has a clamping element capable of descending to clamp the electrode sheet material;

[0009] The cutting assembly includes a first driving part that moves along the length of the base and is disposed on the clamping member, and a rotary cutter disposed on the drive shaft of the first driving part. The rotary cutter is capable of rotating and cutting the electrode sheet material under the drive of the first driving part.

[0010] Furthermore, the cutting mechanism also includes a lifting part located above the base, and the clamping member is connected to the lifting end of the lifting part.

[0011] Furthermore, the clamping member includes a clamping plate with a cutting through hole arranged along the length direction of the base, and the rotating cutter cuts the electrode sheet material through the cutting through hole.

[0012] Further, the pressing plate is provided with a second driving part for driving the first driving part to move.

[0013] Further, the second driving part comprises a slide table cylinder arranged on the pressing plate, the slide table cylinder is arranged along the length direction of the base and located at one side of the cutting through hole along the width direction of the base, and the first driving part is arranged on the sliding seat of the slide table cylinder.

[0014] Further, the lifting part comprises a first lifting cylinder, and the pressing part is connected with the cylinder rod of the first lifting cylinder; and / or the first driving part comprises a first driving motor arranged on the pressing part, and the rotary cutter is connected with the driving shaft of the first driving motor.

[0015] Compared with the prior art, the cutting mechanism has the following advantages:

[0016] The cutting mechanism fixes the to-be-cut pole piece on the base through the pressing part, and drives the rotary cutter to move along the length direction of the base through the first driving part, so that the pole piece is cut, and the diaphragm of the pole piece is not scalded compared with the traditional cutting method of the pole piece, the product manufacturing risk is reduced, and especially compared with the existing cutting method of the diaphragm cutter, the risk of sticking of the diaphragm during cutting of the pole piece is avoided, the time for cleaning and replacing the rotary cutter is reduced, and the operation rate of the cutting mechanism is improved.

[0017] In addition, the lifting part connected with the pressing part is arranged above the base, so that the distance between the pressing part and the base is adjusted, when the lifting part drives the pressing part to abut against the pole piece, the pole piece is stably cut by the rotary cutter, when the lifting part drives the pressing part to separate from the pole piece, the pole piece is conveyed for next cutting, the lifting part comprises the first lifting cylinder, the pressing part can be quickly lifted and lowered, and the first lifting cylinder has simple structure and is easy to control.

[0018] In addition, the pressing part comprises the cutting through hole and the pressing plate, when the pole piece is cut, the lifting part drives the pressing plate to abut against the pole piece, the rotary cutter cuts the pole piece along the length direction of the base through the cutting through hole, and the pressing plate presses the pole pieces on both sides of the cutting through hole on the base, so that the pole piece does not move and bend when the rotary cutter rotates at high speed, and the operation rate of the cutting mechanism is improved.

[0019] Meanwhile, based on the cooperation of the slide table cylinder and the slide base, the first driving part is uniformly cut the pole piece sheet material along the cutting through hole under the driving of the slide table cylinder, the pressing plate is separated from the pole piece sheet material under the driving of the lifting part after cutting, the lifting part drives the pressing plate to press the pole piece sheet material after the pole piece sheet material is conveyed, and the rotary cutter can cut the pole piece sheet material when the slide table cylinder drives the first driving part to reciprocate, so that the operation rate of the cutting mechanism is improved.

[0020] Another purpose of the utility model lies in providing a cutting device which comprises a base frame, a conveying mechanism arranged on the base frame and used for conveying the pole piece sheet material, and a cutting mechanism arranged on the base frame and described above.

[0021] Further, the conveying mechanism comprises a first conveying assembly and a second conveying assembly arranged in sequence along the conveying direction of the pole piece sheet material, the cutting mechanism is located between the first conveying assembly and the second conveying assembly, and the length direction of the base is perpendicular to the conveying direction; the first conveying assembly is used for conveying the pole piece sheet material to the cutting mechanism, and the second conveying assembly is used for conveying and separating the pole piece unit obtained by cutting the pole piece sheet material by the cutting mechanism.

[0022] Further, the first conveying assembly and the second conveying assembly each comprise a conveying roller unit arranged on the base frame and a pressing roller unit arranged above the conveying roller unit, and the conveying roller unit and the pressing roller unit cooperate with each other to convey the pole piece sheet material or the pole piece unit.

[0023] Further, the conveying roller unit comprises a conveying roller rotatably arranged on the base frame and a second driving motor used for driving the conveying roller to rotate; and / or, the pressing roller unit comprises a second lifting cylinder arranged on the base frame, a mounting bracket arranged on the cylinder rod of the second lifting cylinder, and a pressing roller rotatably arranged on the mounting bracket.

[0024] The cutting device can realize continuous conveying and cutting of the pole piece sheet material based on the cooperation of the conveying mechanism and the cutting mechanism, reduces the risk of product manufacturing, and improves the operation rate of the cutting device.

[0025] Further, the first conveying assembly can be arranged to convey the pole piece sheet material so that the cutting mechanism cuts the pole piece sheet material, and the second conveying assembly can be arranged to convey the pole piece unit generated by the cutting mechanism, so as to facilitate the conveying of the pole piece sheet material.

[0026] In addition, based on the cooperation of the conveying roller unit and the pressing roller unit, when the second driving motor drives the conveying roller to rotate and the second lifting cylinder drives the pressing roller to abut against the pole piece sheet material or the pole piece unit, the conveying of the pole piece sheet material or the pole piece unit can be realized. At the same time, the pole piece sheet material or the pole piece unit is conveyed by rotating the conveying roller and the pressing roller, which can reduce the abrasion of the pole piece sheet material and the pole piece unit, so as to improve the quality of the cut pole piece unit. BRIEF DESCRIPTION OF DRAWINGS

[0027] The accompanying drawings, which form a part of the present application, are intended to provide further understanding of the present application, and are used to interpret the specific embodiments of the present application and their descriptions, and do not constitute improper limitations to the present application. In the drawings:

[0028] Figure 1 The overall structure schematic view of the cutting mechanism according to the embodiment of the present application;

[0029] Figure 2 The structure schematic view of the cutting through hole and the pressing plate according to the embodiment of the present application;

[0030] Figure 3 The side view of the second driving part according to the embodiment of the present application;

[0031] Figure 4 The structure schematic view of the cutting device according to the embodiment of the present application;

[0032] Figure 5 The enlarged view of A in FIG. Figure 4 The structure schematic view of the structure shown in FIG.

[0033] Figure 6 The structure schematic view of the structure shown in FIG. Figure 7 The structure schematic view of the structure shown in FIG. Figure 4 The structure schematic view of the structure shown in FIG.

[0034] BRIEF DESCRIPTION OF DRAWINGS

[0035] 1, base;

[0036] 2, pressing assembly; 201, pressing piece; 2011, pressing plate; 2011a, cutting through hole;

[0037] 3, cutting assembly; 301, first driving part; 3011, first driving motor; 302, rotary cutter;

[0038] 4, pole piece sheet material;

[0039] 5, lifting part; 501, first lifting cylinder;

[0040] 6, second driving part; 601, sliding table cylinder; 602, sliding seat;

[0041] 7, base frame;

[0042] 8, conveying mechanism; 8a, first conveying assembly; 8b, second conveying assembly; 801, conveying roller unit; 8011, conveying roller; 8012, second driving motor; 802, pressing roller unit; 8021, second lifting cylinder; 8022, mounting frame; 8023, pressing roller;

[0043] 9, pole piece unit;

[0044] 10, bridge. DETAILED DESCRIPTION

[0045] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0046] In the following description, specific details are set forth in order to provide a thorough understanding of embodiments of the application. However, persons having ordinary skill in the art will appreciate that embodiments of the application can be practiced without the specific details, other embodiments can be implemented without these specific details. In other instances, well-known systems, structures, circuits, and processes have not been described in detail in order to avoid obscuring the application.

[0047] In the description of the present application, it should be noted that if the terms indicating the orientation or position relationship such as "upper", "lower", "inner", "outer" and the like appear, they are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as limiting the application. The application must have a specific orientation, a specific orientation and operation, and therefore cannot be understood as limiting the application. In addition, if the terms "first", "second" and the like appear, they are also used for description purposes only and cannot be understood as indicating or implying relative importance.

[0048] In addition, in the description of the present application, unless otherwise explicitly limited, the terms "mounting", "connection", "connection", "connection" should be broadly understood. For example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood in combination with the specific circumstances.

[0049] The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0050] Embodiment one

[0051] The embodiment relates to a cutting mechanism, in particular to a cutting mechanism for cutting a polar piece sheet 4 with a diaphragm, which can solve the problem that the diaphragm is adhered to the surface of a cutter in the prior art, so as to improve the operation rate of the cutting mechanism.

[0052] As shown in the overall structure, Figures 1 to 3 the cutting mechanism comprises a base 1, a pressing assembly 2 arranged above the base 1, and a cutting assembly 3 arranged on the pressing assembly 2. The pressing assembly 2 has a pressing piece 201 capable of being lowered to press the polar piece sheet 4. The cutting assembly 3 comprises a first driving part 301 arranged on the pressing piece 201 and moving along the length direction of the base 1, and a rotary cutter 302 arranged on the driving shaft of the first driving part 301, the rotary cutter 302 being capable of rotating to cut the polar piece sheet 4 under the driving of the first driving part 301.

[0053] At this time, as arranged above, the polar piece sheet 4 to be cut can be fixed on the base 1 by the pressing piece 201, and the rotary cutter 302 can be driven to move along the length direction of the base 1 by the first driving part 301, so as to realize the purpose of cutting the polar piece sheet 4, and compared with the traditional cutting mode of the polar piece sheet 4, the diaphragm of the polar piece sheet 4 will not be scalded, the risk of product manufacturing is reduced, especially compared with the existing cutting mode of the diaphragm cutter, the risk of diaphragm adhesion during cutting of the polar piece sheet 4 can be avoided, the time for cleaning and replacing the rotary cutter 302 is reduced, and therefore the operation rate of the cutting mechanism can be improved.

[0054] Based on the overall introduction above, in detail, in the embodiment, in the specific implementation, the polar piece sheet 4 can be a negative polar piece with diaphragms compounded on both sides, specifically, the upper and lower diaphragms are simultaneously unwound, the negative polar piece is inserted between the upper and lower diaphragms, and then the upper and lower diaphragms are continuously hot-pressed, so that the negative polar piece is compounded between the upper and lower diaphragms, and then the polar piece sheet 4 in the application is obtained.

[0055] Meanwhile, as shown in Figure 1 and Figure 2 as an optional embodiment of the first driving part 301, the first driving part 301 comprises a first driving motor 3011 arranged on the pressing piece 201, and the rotary cutter 302 is connected with the driving shaft of the first driving motor 3011.

[0056] Based on the purpose of cutting the polar piece sheet 4 by cooperation of the pressing assembly 2 and the cutting assembly 3, as shown in Figure 2 and Figure 3 in order to facilitate adjustment of the distance between the pressing piece 201 and the base 1, so as to realize adjustment of whether the polar piece sheet 4 is tightly pressed against the base 1, the cutting mechanism further preferably comprises a lifting part 5 arranged above the base 1, and the pressing piece 201 is connected with the lifting end of the lifting part 5.

[0057] Thus, the distance between the pressing member 201 and the base 1 can be adjusted by arranging the lifting part 5 above the base 1 and connecting the pressing member 201 to the lifting part 5. When the lifting part 5 drives the pressing member 201 to abut against the pole piece sheet 4, the pole piece sheet 4 can be stably cut by the rotary cutter 302. When the lifting part 5 drives the pressing member 201 to move away from the pole piece sheet 4, the pole piece sheet 4 can be conveyed for the next cutting.

[0058] In a specific implementation, as an implementable manner, the lifting part 5 includes a first lifting cylinder 501, and the pressing member 201 is connected to the cylinder rod of the first lifting cylinder 501. It can be understood that the first lifting cylinder 501 can be used in the lifting part 5 to quickly adjust the lifting of the pressing member 201, and the first lifting cylinder 501 has a simple structure and is easy to control.

[0059] As an optional implementation of the pressing member 201, as shown in Figures 1 to 3 the pressing member 201 includes a pressing plate 2011 with a cutting through hole 2011a. The cutting through hole 2011a is arranged along the length direction of the base 1, and the rotary cutter 302 cuts the pole piece sheet 4 through the cutting through hole 2011a.

[0060] By arranging the pressing member 201 to include the cutting through hole 2011a and the pressing plate 2011, when the pole piece sheet 4 is cut, the lifting part 5 drives the pressing plate 2011 to abut against the pole piece sheet 4, the rotary cutter 302 cuts the pole piece sheet 4 along the length direction of the base 1 through the cutting through hole 2011a, and the pressing plate 2011 presses the pole piece sheet 4 on both sides of the cutting through hole 2011a on the base 1. When the rotary cutter 302 rotates at high speed, the pole piece sheet 4 will not move and fold, and the operation rate of the cutting mechanism is improved.

[0061] Based on the pressing member 201 including the pressing plate 2011 and the lifting part 5 including the first lifting cylinder 501, as an implementable manner, when the lifting part 5 is connected to the pressing member 201, for example, the lifting end of the first lifting cylinder 501 can be fixedly connected to the upper surface of the pressing plate 2011, and the lifting end of the first lifting cylinder 501 is located on one side of the cutting through hole 2011a.

[0062] In order to improve the stability of the pole piece material 4 during cutting based on the pressing of the pressing plate 2011, in order to make the first driving part 301 slide along the direction in which the cutting through hole 2011a is formed, the pressing plate 2011 is provided with a second driving part 6 for driving the first driving part 301 to move. Specifically, as one of the possible implementations, the second driving part 6 includes a sliding table cylinder 601 arranged on the pressing plate 2011, the sliding table cylinder 601 is arranged along the length direction of the base 1 and located on one side of the cutting through hole 2011a along the width direction of the base 1, and the first driving part 301 is arranged on the sliding seat 602 of the sliding table cylinder 601, that is, the first driving motor 3011 is connected to the sliding seat 602.

[0063] Here, based on the cooperation of the sliding table cylinder 601 and the sliding seat 602, as shown in Figures 1 to 3 the first driving part 301 is uniformly cut along the cutting through hole 2011a at a constant speed under the driving of the sliding seat 602, the pressing plate 2011 is separated from the pole piece material 4 under the driving of the lifting part 5 after cutting, the lifting part 5 drives the pressing plate 2011 to press the pole piece material 4 after the pole piece material 4 is conveyed, and the rotating cutter 302 can cut the pole piece material 4 when the first driving part 301 is driven to reciprocate by the sliding table cylinder 601, thereby improving the operation rate of the cutting mechanism.

[0064] When the lifting end of the first lifting cylinder 501 is located on one side of the cutting through hole 2011a, as one of the possible implementations of the second driving part 6, for example, the sliding table cylinder 601 can be fixedly connected to the pressing plate 2011 and located on the other side of the cutting through hole 2011a.

[0065] When the cutting mechanism of the embodiment is used, the pressing plate 2011 is adjusted to be away from the base 1 by the lifting part 5, at this time, the pole piece material 4 is conveyed between the base 1 and the pressing plate 2011, then the pressing plate 2011 is pressed against the pole piece material 4 by controlling the lifting part 5, the first driving part 301 is started, the driving shaft of the first driving motor 3011 drives the rotating cutter 302 to rotate and cut the pole piece material 4, and the second driving part 6 is started at the same time, the sliding table cylinder 601 of the second driving part 6 drives the first driving motor 3011 and the rotating cutter 302 to slide along the direction in which the cutting through hole 2011a is formed, thereby completing the cutting of the pole piece material 4.

[0066] In the embodiment, the rotary cutter 302 can separate the pole piece sheet 4 in a rotation manner, which is beneficial to ensure the end face cutting effect of the pole piece sheet 4. The rotary cutter 302 adopts a cold cutting manner, and there is no risk of thermal radiation scalding the separator. The positive pole piece unit (the assembly of the positive pole piece with the separator compounded on both sides of the positive pole piece) and the negative pole piece unit (the assembly of the negative pole piece with the separator compounded on both sides of the negative pole piece) can be prevented from being stacked together to cause a contact short circuit and fire risk. After the rotary cutter 302 is worn, only the rotary cutter 302 needs to be replaced, and no adjustment is needed, which can reduce equipment failure and maintenance time and is beneficial to quickly resume production.

[0067] Therefore, compared with the conventional cutting method of the pole piece sheet 4, the cutting mechanism of the embodiment can avoid the risk of the separator sticking during cutting of the pole piece sheet 4, reduce the time for cleaning and replacing the rotary cutter 302, and thus improve the operation rate of the cutting mechanism.

[0068] Embodiment Two

[0069] The embodiment relates to a cutting device, as shown in Figures 4 to 6 which comprises a base frame 7, a conveying mechanism 8 arranged on the base frame 7 and configured to convey the pole piece sheet 4, and the cutting mechanism as above arranged on the base frame 7. It can be understood that, based on cooperation of the conveying mechanism 8 and the cutting mechanism in the first embodiment, the pole piece sheet 4 can be continuously conveyed and cut, the product manufacturing risk is reduced, and the operation rate of the cutting device is improved.

[0070] Specifically, as shown in Figure 6 and Figure 7 as a preferred implementation form, the conveying mechanism 8 comprises a first conveying assembly 8a and a second conveying assembly 8b arranged in sequence along the conveying direction of the pole piece sheet 4, the cutting mechanism is located between the first conveying assembly 8a and the second conveying assembly 8b, and the length direction of the base 1 is perpendicular to the conveying direction. The first conveying assembly 8a is configured to convey the pole piece sheet 4 to the cutting mechanism, and the second conveying assembly 8b is configured to convey and separate the pole piece unit 9 obtained by cutting the pole piece sheet 4 by the cutting mechanism.

[0071] At this time, the conveying mechanism 8 is configured to include the first conveying assembly 8a to convey the pole piece sheet 4 to the cutting mechanism for cutting, and the second conveying assembly 8b to convey the pole piece unit 9 generated by the cutting mechanism, so that the pole piece sheet 4 can be conveyed continuously, and the cutting device can continuously cut the pole piece sheet 4 without interruption.

[0072] In the embodiment, as a preferred implementation form, as shown in Figures 4 to 6As shown, both the first conveying assembly 8a and the second conveying assembly 8b include a conveying roller unit 801 disposed on the base frame 7 and a pressure roller unit 802 disposed above the conveying roller unit 801. The conveying roller unit 801 and the pressure roller unit 802 cooperate with each other to convey the electrode sheet material 4 or the electrode unit 9.

[0073] Specifically, the conveyor roller unit 801 includes a conveyor roller 8011 rotatably mounted on the base frame 7, and a second drive motor 8012 for driving the conveyor roller 8011 to rotate; the pressure roller unit 802 includes a second lifting cylinder 8021 mounted on the base frame 7, a mounting bracket 8022 mounted on the cylinder rod of the second lifting cylinder 8021, and a pressure roller 8023 rotatably mounted on the mounting bracket 8022.

[0074] The main advantage of this arrangement is that, based on the cooperation of the conveyor roller unit 801 and the pressure roller unit 802, when the second drive motor 8012 drives the conveyor roller 8011 to rotate, and the second lifting cylinder 8021 drives the pressure roller 8023 to abut against the electrode sheet 4 or the electrode unit 9, the electrode sheet 4 or the electrode unit 9 can be conveyed. It also facilitates the control of the second lifting cylinder 8021 to disengage the pressure roller 8023 from the electrode sheet 4 when the cutting mechanism cuts the electrode sheet 4. Simultaneously, the rotating conveyor roller 8011 and pressure roller 8023 contact the electrode sheet 4 and the electrode unit 9, reducing wear on the electrode sheet 4 and the electrode unit 9, thus ensuring the quality of the electrode sheet 4 and the electrode unit 9.

[0075] It is worth mentioning that, such as Figure 5 As shown, in this embodiment, the base frame 7 has a bridge frame 10, the crossbeam of the bridge frame 10 is located above the mounting frame 8022, and the cylinder body of the second lifting cylinder 8021 is fixedly connected to the bridge frame 10. Meanwhile, based on the fact that the cutting mechanism is located between the first conveying assembly 8a and the second conveying assembly 8b, the lifting part 5 in the cutting mechanism is connected to the bridge frame 10, and for example, when the lifting part 5 is located on the side closer to the first conveying assembly 8a, the lifting part 5 is connected to the bridge frame 10 on the side of the first conveying assembly 8a; when the lifting part 5 includes the first lifting cylinder 501, the cylinder body of the first lifting cylinder 501 is fixedly connected to the mounting frame 8022.

[0076] The cutting device of the embodiment, when cutting the pole piece sheet 4 into the pole piece unit 9, the second lifting cylinder 8021 drives the compression roller 8023 to move downward to clamp the pole piece sheet 4 between the compression roller 8023 and the conveying roller 8011, the first conveying assembly 8a is started, the second driving motor 8012 drives the conveying roller 8011 to rotate, the pole piece sheet 4 is conveyed into the cutting mechanism, after the pole piece sheet 4 is cut into the pole piece unit 9, the second conveying assembly 8b is started, the second conveying assembly 8b drives the pole piece unit 9 to convey along the conveying direction, and the cycle is repeated, so that the pole piece sheet 4 can be cut into the pole piece unit 9, the conveying and cutting of the pole piece sheet 4 can be continuously realized, and the product manufacturing risk is low and the device operation rate is high.

[0077] The above merely describes the preferred embodiment of the utility model, and is not used to limit the utility model, and any modification, equivalent replacement, improvement and the like made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A cutting mechanism for cutting pole piece blanks hot compounded with a separator film, Characterized in that; The cutting mechanism comprises a base, a pressing assembly arranged above the base, and a cutting assembly arranged on the pressing assembly; The pressing assembly has a pressing piece capable of descending to press the pole piece sheet material; The cutting assembly comprises a first driving part arranged on the pressing piece and moving along the length direction of the base, and a rotary cutter arranged on the driving shaft of the first driving part, the rotary cutter being capable of rotating to cut the pole piece sheet material under the driving of the first driving part.

2. The cutting mechanism according to claim 1, characterized in that: It further comprises a lifting part arranged above the base, and the pressing piece is connected with the lifting end of the lifting part.

3. The cutting mechanism according to claim 2, characterized in that: The pressing piece comprises a pressing plate with a cutting through hole, the cutting through hole being arranged along the length direction of the base, and the rotary cutter cuts the pole piece sheet material through the cutting through hole.

4. The cutting mechanism according to claim 3, characterized in that: A second driving part is arranged on the pressing plate to drive the first driving part to move.

5. The cutting mechanism according to claim 4, characterized in that: The second driving part comprises a slide table air cylinder arranged on the pressing plate, the slide table air cylinder being arranged along the length direction of the base and located on one side of the cutting through hole along the width direction of the base, and the first driving part is arranged on the sliding seat of the slide table air cylinder.

6. The cutting mechanism according to any one of claims 2 to 5, characterized in that: The lifting part comprises a first lifting air cylinder, and the pressing piece is connected with the cylinder rod of the first lifting air cylinder; and / or, The first driving part comprises a first driving motor arranged on the pressing piece, and the rotary cutter is connected with the driving shaft of the first driving motor.

7. A cutting device, characterized in that: It comprises a base frame, a conveying mechanism arranged on the base frame to convey the pole piece sheet material, and the cutting mechanism according to any one of claims 1 to 6 arranged on the base frame.

8. The cutting device according to claim 7, characterized in that: The conveying mechanism comprises a first conveying assembly and a second conveying assembly arranged in sequence along the conveying direction of the pole piece sheet material, the cutting mechanism is located between the first conveying assembly and the second conveying assembly, and the length direction of the base is perpendicular to the conveying direction; The first conveying assembly is used to convey the pole piece sheet material to the cutting mechanism, and the second conveying assembly is used to convey and separate the pole piece units obtained by cutting the pole piece sheet material by the cutting mechanism.

9. The cutting device according to claim 8, characterized in that: Both the first conveying assembly and the second conveying assembly comprise a conveying roller unit arranged on the base frame, and a compression roller unit arranged above the conveying roller unit, the conveying roller unit and the compression roller unit cooperate with each other to convey the pole piece sheet material or the pole piece units.

10. The cutting device according to claim 9, characterized in that: The conveying roller unit comprises a conveying roller rotatably arranged on the base frame, and a second driving motor for driving the conveying roller to rotate; and / or, The pressing roller unit comprises a second lifting cylinder arranged on the base frame, a mounting frame arranged on a cylinder rod of the second lifting cylinder, and a pressing roller rotatably arranged on the mounting frame.

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