Pole piece circular knife cutting assembly and slitting equipment

Abstract

According to the pole piece circular knife cutting assembly and the slitting equipment, the cutting unit and the matching unit are arranged, a circular knife of the cutting unit can be partially embedded between two circular knife accessories of the matching unit to form staggered blade matching, and the traditional die cutting mode that an upper knife and a lower knife make direct contact is avoided. According to the staggered blade matching structure, direct friction between the cutters can be reduced, heat and static electricity generated in the die cutting process can be reduced, machining chippings can be effectively prevented from being accumulated on cutter points, and therefore the service life of the cutters is remarkably prolonged. Through cooperation of the first limiting piece and the second limiting piece, the relative position of the circular knife and the circular knife accessory can be accurately positioned, and it is ensured that the pole piece is conveyed to the staggered blade matching position to be accurately cut. And meanwhile, the structure is convenient to realize side-by-side arrangement of a plurality of groups of cutting parts and matching parts, and a plurality of parts of the pole piece can be cut at the same time, so that the production efficiency of the pole piece is greatly improved, and the requirement of batch production of the large-size pole piece is met.

Description

Technical Field

[0001] This utility model relates to the field of electrode die-cutting in lithium battery production equipment, and particularly to an electrode circular knife cutting assembly and slitting equipment. Background Technology

[0002] In the production process of lithium batteries, rolled electrode sheets need to be cut into individual electrode sheets. Currently, the main electrode sheet cutting methods on the market include laser die-cutting and metal die-cutting. Among them, metal die-cutting is widely used in the field of electrode sheet cutting due to its strong applicability. However, traditional metal die-cutting uses a cutting method with upper and lower blades working together. The direct contact between the upper and lower blades during the die-cutting process generates friction and heat, easily produces static electricity, and processing debris easily accumulates on the blade edge, leading to a sharp decrease in the life of the blades.

[0003] With the rapid development of new energy batteries, the market demand for large-size electrode sheets is constantly increasing. Traditional metal die-cutting methods, which use upper and lower blades for cutting, can only cut one electrode sheet at a time, and their production efficiency is gradually failing to meet current production needs. Furthermore, due to the special properties of some electrode materials, laser die-cutting cannot completely replace metal die-cutting. Therefore, there is an urgent need for an electrode cutting device that can simultaneously cut multiple sheets and has a long service life to solve the technical problems existing in current technologies. Utility Model Content

[0004] To overcome the shortcomings of existing technologies, this utility model provides an electrode sheet circular blade cutting assembly and slitting device that achieves efficient cutting through a staggered blade arrangement. This electrode sheet circular blade cutting assembly uses a staggered blade arrangement between the circular blades of the cutting unit and the circular blade accessories of the mating unit, avoiding frictional wear caused by direct contact between the upper and lower blades in traditional methods, thus extending the blade's service life. Simultaneously, the parallel arrangement of multiple cutting sections and mating sections enables simultaneous cutting of multiple electrode sheets.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] A circular blade cutting assembly for electrodes includes a cutting unit and a mating unit arranged opposite each other. The cutting unit includes a cutting section, which includes a circular blade and a first limiting member for positioning the circular blade. The mating unit includes a mating section, which includes two circular blade accessories spaced apart and a second limiting member for positioning the circular blade accessories. The circular blade of the cutting unit can be partially embedded between the two circular blade accessories of the mating unit to form a staggered blade engagement. The first limiting member and the second limiting member are used to transport the electrode to the staggered blade engagement for cutting.

[0007] Furthermore, the cutting unit includes a first bearing housing, a first drive shaft rotatably connected within the first bearing housing, and a first drive member fixedly connected to one end of the first drive shaft; the first drive member is used to drive the first drive shaft to rotate; the mating unit includes a second bearing housing, a second drive shaft rotatably connected within the second bearing housing, and a second drive member fixedly connected to one end of the second drive shaft; the second drive member is used to drive the second drive shaft to rotate; the first limiting member is fixedly connected to the first drive shaft, and the circular blade rotates synchronously with the first drive shaft through the first limiting member; the second limiting member is fixedly connected to the second drive shaft, and the circular blade accessory rotates synchronously with the second drive shaft through the second limiting member.

[0008] Furthermore, it also includes a base, the second bearing seat is fixed to the base by a first adjusting part, and the first bearing seat is fixedly connected to the second bearing seat by a second adjusting part; the first adjusting part is used to adjust the height position of the second bearing seat relative to the base in the vertical direction; the second adjusting part is used to adjust the height position of the first bearing seat relative to the second bearing seat in the vertical direction.

[0009] Furthermore, the first adjustment part includes a first pad and a second pad, and the opposing surfaces of the first pad and the second pad are provided with wedge-shaped structures, and the two wedge-shaped structures abut against each other; by moving the first pad and the second pad relative to each other, the two wedge-shaped structures slide relative to each other along their inclined surfaces to adjust the height position of the second bearing seat.

[0010] Furthermore, the second adjustment part includes an adjustment handle, an adjustment shaft, and an adjustment fixing ring; the adjustment fixing ring is fixedly connected to the first bearing seat, and one end of the adjustment shaft is fixedly connected to the adjustment handle; the adjustment fixing ring is threadedly engaged with the adjustment shaft, and rotating the adjustment handle drives the adjustment shaft to rotate, thereby driving the first bearing seat to move in the vertical direction through the threaded engagement.

[0011] Furthermore, the first limiting member includes two first positioning rollers, and the circular blade is sandwiched between the two first positioning rollers and protrudes from the first positioning rollers; the second limiting member includes two second positioning rollers, and the two circular blade accessories are sandwiched between the two second positioning rollers, and the diameter of the circular blade accessories is the same as the diameter of the second positioning rollers.

[0012] Furthermore, it includes multiple sets of cutting sections and mating sections, which are arranged side by side along the electrode conveying direction to simultaneously cut the electrode at multiple points.

[0013] Furthermore, the first driving component and the second driving component have the same structure, both including a motor, a reducer, and a coupling; the input end of the reducer is connected to the output shaft of the motor, and the output shaft of the reducer is connected to the corresponding driving shaft through the coupling; wherein, the coupling of the first driving component is connected to the first driving shaft, and the coupling of the second driving component is connected to the second driving shaft.

[0014] An electrode slitting device includes the aforementioned electrode circular blade cutting structure.

[0015] Furthermore, it also includes: an electrode cutting blade assembly, an upper gripper lateral movement assembly, a lower gripper lateral movement assembly, a conveyor belt assembly, a clamping tension assembly, and a suction and following assembly; the electrode cutting blade assembly includes a traction roller, which is used to pull the material belt and perform a primary cut on the electrode; the suction and following assembly is used to attract and transport the electrode cut by the electrode cutting blade assembly to the electrode receiving platform, which is located above the lower gripper lateral movement assembly; the grippers of the lower gripper lateral movement assembly are used to drag the electrode towards the electrode circular blade cutting assembly, and the grippers of the upper gripper lateral movement assembly are used to feed the electrode into the electrode circular blade cutting assembly; the electrode circular blade cutting assembly is used to perform a secondary cut on the electrode; the clamping tension assembly is located above the conveyor belt assembly and includes an upper gripper and a lower gripper, which are used to clamp the electrode cut by the electrode circular blade cutting assembly and transport it to the conveyor belt assembly.

[0016] The beneficial effects of this utility model are:

[0017] This utility model's electrode circular blade cutting assembly incorporates a cutting unit and a mating unit. The circular blade of the cutting unit partially embeds into two circular blade components of the mating unit, forming a staggered edge fit, thus avoiding the direct contact between the upper and lower blades in traditional die-cutting methods. This staggered edge fit structure not only reduces direct friction between the blades, lowering heat and static electricity generated during die-cutting, but also effectively prevents the accumulation of processing debris on the blade edge, significantly extending the blade's lifespan. Through the cooperation of the first and second limiting components, the relative positions of the circular blade and its components are accurately positioned, ensuring the electrode is precisely cut at the staggered edge fit. Furthermore, this structure facilitates the side-by-side arrangement of multiple cutting sections and mating sections, allowing for simultaneous cutting of the electrode at multiple points, greatly improving electrode production efficiency and meeting the needs of mass production of large-size electrodes. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] Figure 1 This is a three-dimensional structural schematic diagram of the electrode circular blade cutting assembly of this utility model - 1;

[0020] Figure 2 This is a disassembled schematic diagram of the electrode circular blade cutting component of this utility model;

[0021] Figure 3 This is a partial structural schematic diagram of the electrode circular blade cutting assembly of this utility model;

[0022] Figure 4 This is a three-dimensional structural schematic diagram of the electrode circular blade cutting component of this utility model - 2;

[0023] Figure 5 This is a three-dimensional structural schematic diagram of the electrode sheet slitting device of this utility model - 1;

[0024] Figure 6 This is a three-dimensional structural schematic diagram of the electrode slitting device of this utility model - 2.

[0025] in,

[0026] 1. Electrode circular blade cutting assembly;

[0027] 11. Cutting unit; 111. Cutting section; 1111. Circular blade; 1112. First limiting member; 1113. First bearing seat; 1114. First drive shaft; 1115. First drive member; 1115a. Motor; 1115b. Reducer; 1115c. Coupling;

[0028] 12. Mating unit; 121. Mating part; 1211. Circular knife accessory; 1212. Second limiting component; 1213. Second bearing seat; 1214. Second drive shaft; 1215. Second drive component;

[0029] 13. Base;

[0030] 14. First adjusting part; 141. First pad; 142. Second pad;

[0031] 15. Second adjustment part; 151. Adjustment handle; 152. Adjustment shaft; 153. Adjustment retaining ring;

[0032] 16. Sliding components;

[0033] 2. Electrode cutting blade assembly; 3. Upper jaw lateral movement assembly; 4. Lower jaw lateral movement assembly; 5. Conveyor belt assembly; 6. Clamping tension assembly; 7. Suction and follow assembly. Detailed Implementation

[0034] The following will clearly and completely describe the concept, specific structure, and technical effects of this utility model in conjunction with embodiments and accompanying drawings, so as to fully understand the purpose, features, and effects of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. Other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are all within the scope of protection of this utility model. Furthermore, all connections / linkages involved in the patent do not simply refer to direct contact between components, but rather to the ability to form a better connection structure by adding or reducing connecting accessories according to specific implementation conditions. The various technical features in this utility model can be combined interactively without contradicting each other.

[0035] Reference Figure 1-4 A circular blade cutting assembly 1 for electrode sheets includes a cutting unit 11 and a mating unit 12 arranged opposite to each other. The cutting unit 11 includes a cutting section 111, which includes a circular blade 1111 and a first limiting member 1112 for positioning the circular blade 1111. The mating unit 12 includes a mating section 121, which includes two spaced-apart circular blade fittings 1211 and a second limiting member 1212 for positioning the circular blade fittings 1211. The circular blade 1111 of the cutting unit 11 can be partially embedded between the two circular blade fittings 1211 of the mating unit 12 to form a staggered edge fit. The first limiting member 1112 and the second limiting member 1212 are used to transport the electrode sheet to the staggered edge fit for cutting. It is understood that the electrode circular blade cutting assembly 1 cuts the electrode sheet through the relatively arranged cutting unit 11 and mating unit 12. The cutting part 111 of the cutting unit 11 includes a circular blade 1111 and a first limiting member 1112 for positioning the circular blade 1111. The mating part 121 of the mating unit 12 includes two spaced-apart circular blade accessories 1211 and a second limiting member 1212 for positioning the circular blade accessories 1211. By embedding the circular blade 1111 of the cutting unit 11 between the two circular blade accessories 1211 of the mating unit 12 to form a staggered blade mating structure, the electrode sheet to be cut is accurately transported to the staggered blade mating area for cutting by the cooperation of the first limiting member 1112 and the second limiting member 1212. For example, in the process of cutting lithium battery electrodes, when the electrode is transported to the staggered edge joint, the staggered edge joint structure formed between the circular blade 1111 and the two circular blade accessories 1211 can achieve precise cutting of the electrode. This staggered edge joint not only avoids the wear caused by the direct contact between the upper and lower blades in the traditional method, but also ensures the accuracy and efficiency of cutting.

[0036] In some embodiments, refer to Figure 2The cutting unit 11 includes a first bearing seat 1113, a first drive shaft 1114 rotatably connected within the first bearing seat 1113, and a first drive member 1115 fixedly connected to one end of the first drive shaft 1114; the first drive member 1115 is used to drive the first drive shaft 1114 to rotate. The mating unit 12 includes a second bearing seat 1213, a second drive shaft 1214 rotatably connected within the second bearing seat 1213, and a second drive member 1215 fixedly connected to one end of the second drive shaft 1214; the second drive member 1215 is used to drive the second drive shaft 1214 to rotate. The first limiting member 1112 is fixedly connected to the first drive shaft 1114, and the circular blade 1111 rotates synchronously with the first drive shaft 1114 through the first limiting member 1112. The second limiting member 1212 is fixedly connected to the second drive shaft 1214, and the circular blade accessory 1211 rotates synchronously with the second drive shaft 1214 through the second limiting member 1212. It is understandable that the cutting unit 11 adopts a structure in which the first driving member 1115 drives the first driving shaft 1114 to rotate within the first bearing seat 1113. Through the fixed connection between the first limiting member 1112 and the first driving shaft 1114, the circular blade 1111 can rotate synchronously with the first driving shaft 1114. The mating unit 12 adopts a structure in which the second driving member 1215 drives the second driving shaft 1214 to rotate within the second bearing seat 1213. Through the fixed connection between the second limiting member 1212 and the second driving shaft 1214, the circular blade accessory 1211 can rotate synchronously with the second driving shaft 1214. When the electrode sheet needs to be cut, the first driving component 1115 drives the first driving shaft 1114 to rotate, which in turn drives the first limiting component 1112 fixedly connected to it to rotate, thereby driving the circular blade 1111 to rotate. At the same time, the second driving component 1215 drives the second driving shaft 1214 to rotate, which in turn drives the second limiting component 1212 fixedly connected to it to rotate, thereby driving the circular blade accessory 1211 to rotate. The synchronous rotation of the two components enables continuous cutting of the electrode sheet. This driving method ensures the continuity and stability of the cutting process.

[0037] Furthermore, refer to Figure 2The system also includes a base 13, with the second bearing seat 1213 fixed to the base 13 via a first adjusting part 14. The first bearing seat 1113 is fixedly connected to the second bearing seat 1213 via a second adjusting part 15. The first adjusting part 14 is used to adjust the height of the second bearing seat 1213 relative to the base 13 in the vertical direction; the second adjusting part 15 is used to adjust the height of the first bearing seat 1113 relative to the second bearing seat 1213 in the vertical direction. It is understood that when it is necessary to adjust the cutting accuracy or adapt to electrode sheets of different thicknesses, the height of the second bearing seat 1213 can be adjusted via the first adjusting part 14, thereby adjusting the position of the circular blade accessory 1211. Then, the height of the first bearing seat 1113 can be adjusted via the second adjusting part 15, thereby adjusting the position of the circular blade 1111. This dual height adjustment mechanism ensures that the circular blade 1111 and the circular blade accessory 1211 can form an optimal staggered blade fit, improving cutting accuracy and adaptability.

[0038] In some embodiments, refer to Figure 2 The first adjustment part 14 includes a first pad 141 and a second pad 142. Both the first pad 141 and the second pad 142 have wedge-shaped structures on their opposing surfaces, and the two wedge-shaped structures abut against each other. By relatively moving the first pad 141 and the second pad 142, the two wedge-shaped structures slide relative to each other along their inclined surfaces, thereby adjusting the height position of the second bearing seat 1213. It can be understood that the two wedge-shaped structures abut against each other, and by relatively moving the first pad 141 and the second pad 142, the two wedge-shaped structures slide relative to each other along their inclined surfaces, thereby achieving precise adjustment of the height position of the second bearing seat 1213. When it is necessary to adjust the height position of the circular cutter accessory 1211, the height can be finely adjusted by moving the first pad 141 or the second pad 142 and utilizing the sliding of the wedge-shaped structures. Due to the good self-locking and precision of the wedge-shaped structures, this adjustment method is not only simple to operate but also maintains a stable adjustment effect.

[0039] In some embodiments, continue to refer to Figure 2The second adjustment part 15 includes an adjustment handle 151, an adjustment shaft 152, and an adjustment fixing ring 153. The adjustment fixing ring 153 is fixedly connected to the first bearing seat 1113, and one end of the adjustment shaft 152 is fixedly connected to the adjustment handle 151. The adjustment fixing ring 153 and the adjustment shaft 152 are threadedly engaged. Rotating the adjustment handle 151 drives the adjustment shaft 152 to rotate, thereby driving the first bearing seat 1113 to move vertically through the threaded engagement. It can be understood that by using the threaded engagement principle to drive the first bearing seat 1113 to move vertically, when it is necessary to adjust the height of the circular cutter 1111, the operator can rotate the adjustment handle 151 to convert the rotational motion into linear motion of the first bearing seat 1113 through threaded transmission, thereby achieving precise adjustment of the height of the circular cutter 1111.

[0040] In some embodiments, refer to Figure 3 The first limiting member 1112 includes two first positioning rollers, and the circular blade 1111 is sandwiched between the two first positioning rollers and protrudes from the first positioning rollers. The second limiting member 1212 includes two second positioning rollers, and the two circular blade accessories 1211 are sandwiched between the two second positioning rollers, with the diameter of the circular blade accessories 1211 being the same as the diameter of the second positioning rollers. The two circular blade accessories 1211 are sandwiched between the two second positioning rollers, and specifically, the diameter of the circular blade accessories 1211 is the same as the diameter of the second positioning rollers. When the electrode sheet passes through the cutting area, the two first positioning rollers can stably support and position the circular blade 1111, maintaining its correct cutting posture. Simultaneously, the design that the two second positioning rollers have the same diameter as the circular blade accessories 1211 ensures that the electrode sheet can smoothly pass through the cutting area during transport. This positioning structure not only improves the stability of cutting but also prevents the electrode sheet from shifting or deforming during the cutting process.

[0041] In some embodiments, refer to Figure 3 The system includes multiple sets of cutting sections 111 and mating sections 121, arranged side-by-side along the electrode conveying direction to simultaneously cut the electrode at multiple points. When the electrode passes through the cutting area, the multiple sets of side-by-side cutting sections 111 and mating sections 121 can simultaneously perform multiple cuts on the electrode, greatly improving production efficiency. For example, edge trimming and slitting of the electrode can be completed simultaneously. This multi-set, side-by-side structure not only improves cutting efficiency but also ensures the synchronization and consistency of multiple cuts.

[0042] In some embodiments, refer to Figure 2The first drive component 1115 and the second drive component 1215 have the same structure, both including a motor 1115a, a reducer 1115b, and a coupling 1115c. The input end of the reducer 1115b is connected to the output shaft of the motor 1115a, and the output shaft of the reducer 1115b is connected to the corresponding drive shaft through the coupling 1115c. Specifically, the coupling 1115c of the first drive component 1115 is connected to the first drive shaft 1114, and the coupling 1115c of the second drive component 1215 is connected to the second drive shaft 1214. During the cutting process, when it is necessary to drive the circular blade 1111 and the circular blade accessory 1211 to rotate, the two driving components start synchronously. The first driving component 1115 drives the circular blade 1111 to rotate, and the second driving component 1215 drives the circular blade accessory 1211 to rotate. The two form a staggered blade engagement relationship. The precise cutting of the electrode sheet is achieved through the relative movement between the circular blade 1111 and the circular blade accessory 1211. This dual-drive cooperative working mode not only ensures that the circular blade 1111 and the circular blade accessory 1211 maintain a stable rotation speed, but also, due to the use of the same driving structure, the rotation speed of the circular blade 1111 and the circular blade accessory 1211 can be kept synchronized, thereby achieving the best cutting effect. At the same time, the setting of the reducer 1115b can also provide appropriate torque to ensure the stability of the cutting process.

[0043] This case involves an electrode slitting device, referring to... Figure 5 , 6 This includes the aforementioned electrode circular cutter cutting structure. By employing the aforementioned electrode circular cutter cutting structure, the equipment can achieve efficient and precise cutting of lithium battery electrodes. By integrating this circular cutter cutting structure, its technical features, such as the parallel arrangement of multiple cutting sections 111 and mating sections 121, dual-drive synchronous control, and precise height adjustment, can be fully utilized to achieve high-quality electrode slitting processing.

[0044] In some embodiments, the system further includes an electrode cutting blade assembly 2, an upper jaw lateral movement assembly 3, a lower jaw lateral movement assembly 4, a belt conveyor assembly 5, a clamping tension assembly 6, and a suction and following assembly 7. All these components are uniformly installed and fixed by a frame to form a complete electrode slitting system.

[0045] First, the traction roller in the electrode cutting assembly 2 pulls the material strip and completes the first cutting of the electrode. At this time, the suction follower assembly 7 will absorb the electrode after the first cutting and transport it to the electrode receiving platform set above the lower gripper lateral movement assembly 4. Then, the gripper of the lower gripper lateral movement assembly 4 will drag the electrode towards the electrode circular cutter cutting assembly 1. At the same time, the gripper of the upper gripper lateral movement assembly 3 will cooperate to send the electrode into the electrode circular cutter cutting assembly 1, where the electrode circular cutter cutting assembly 1 will perform a second cutting. This second cutting uses the circular cutter 1111 with staggered blades to cut the electrode, which can complete the cutting of multiple electrodes at the same time. Then, the clamping tension assembly 6 set above the belt conveyor assembly 5 will hold the electrode after the second cutting through its upper and lower grippers and transport it to the belt conveyor assembly 5. Finally, the belt conveyor assembly 5 will transport the cut electrode to the next process. For example, in the production process of lithium battery electrodes, it is necessary to cut the entire roll of electrodes into individual pieces suitable for the battery size. This equipment can first cut the electrodes into large pieces through a single cut, and then cut multiple electrodes of the required size simultaneously through a secondary cut using a circular blade with staggered blades. The entire process uses adsorption, clamping and other methods to ensure the stability of the electrode conveying process, thereby ensuring the accuracy and efficiency of electrode cutting.

[0046] Furthermore, refer to Figure 1 , 4 The bottom of the electrode circular cutter assembly 1 is equipped with a sliding component 16. During routine maintenance and component replacement, the sliding component 16 helps workers easily move and operate the assembly, greatly reducing the difficulty of maintenance work. In actual production, to ensure cutting accuracy and equipment stability, the electrode circular cutter assembly is firmly fixed to the frame. This ensures the stability and accuracy of the electrode during the cutting process, thereby ensuring the cutting quality of the lithium battery electrode.

[0047] The above is a detailed description of the preferred embodiments of the present utility model. However, the present utility model is not limited to the described embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present utility model. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. A pole piece rotary knife cutting assembly, characterized by, The cutting unit and the matching unit are oppositely arranged, The cutting unit comprises a cutting part, the cutting part comprises a circular knife and a first limiting piece, and the first limiting piece is used for positioning the circular knife; The matching unit comprises a matching part, the matching part comprises two circular knife accessories arranged at intervals and a second limiting piece, and the second limiting piece is used for positioning the circular knife accessory; The circular knife of the cutting unit can be partially embedded between the two circular knife accessories of the matching unit to form a staggered blade matching, and the first limiting piece and the second limiting piece are used for conveying the pole piece to the staggered blade matching position for cutting.

2. The pole piece circular knife cutting assembly according to claim 1, wherein The cutting unit comprises a first bearing seat, a first driving shaft rotatably connected in the first bearing seat, and a first driving piece fixedly connected to one end of the first driving shaft; the first driving piece is used for driving the first driving shaft to rotate; The matching unit comprises a second bearing seat, a second driving shaft rotatably connected in the second bearing seat, and a second driving piece fixedly connected to one end of the second driving shaft; the second driving piece is used for driving the second driving shaft to rotate; The first limiting piece is fixedly connected to the first driving shaft, and the circular knife rotates synchronously with the first driving shaft through the first limiting piece; the second limiting piece is fixedly connected to the second driving shaft, and the circular knife accessory rotates synchronously with the second driving shaft through the second limiting piece.

3. The pole piece circular knife cutting assembly according to claim 2, wherein It further comprises a base, the second bearing seat is fixed on the base through a first adjusting part, and the first bearing seat is fixedly connected with the second bearing seat through a second adjusting part; The first adjusting part is used for adjusting the height position of the second bearing seat relative to the base in the vertical direction; The second adjusting part is used for adjusting the height position of the first bearing seat relative to the second bearing seat in the vertical direction.

4. The pole piece circular knife cutting assembly according to claim 3, wherein The first adjusting part comprises a first pad plate and a second pad plate, and the opposite surfaces of the first pad plate and the second pad plate are provided with wedge structures, and the two wedge structures abut against each other; By relatively moving the first pad plate and the second pad plate, the two wedge structures relatively slide along the inclined surfaces thereof to adjust the height position of the second bearing seat.

5. The pole piece circular knife cutting assembly according to claim 3, wherein The second adjusting part comprises an adjusting handle, an adjusting shaft and an adjusting fixed ring; The adjusting fixed ring is fixedly connected to the first bearing seat, and one end of the adjusting shaft is fixedly connected to the adjusting handle; The adjusting fixed ring is in threaded cooperation with the adjusting shaft, the adjusting handle is rotated to drive the adjusting shaft to rotate, and the first bearing seat is driven to move in the vertical direction through the threaded cooperation.

6. The pole piece circular knife cutting assembly according to claim 1, wherein The first limiting piece comprises two first positioning rollers, and the circular knife is clamped between the two first positioning rollers and protrudes from the first positioning rollers; The second limiting member includes two second positioning rollers, the two circular knife accessory clamps are arranged between the two second positioning rollers, and the diameter of the circular knife accessory is the same as the diameter of the second positioning roller.

7. The pole piece circular knife cutting assembly according to claim 1, characterized in that, a plurality of sets of the cutting part and the matching part are arranged side by side along the pole piece conveying direction to simultaneously cut the pole piece at multiple positions.

8. The pole piece circular knife cutting assembly according to claim 2, characterized in that, the first driving member and the second driving member are the same in structure and each include a motor, a speed reducer and a shaft coupling; the input end of the speed reducer is connected with the output shaft of the motor, and the output shaft of the speed reducer is connected with the corresponding driving shaft through the shaft coupling; wherein the shaft coupling of the first driving member is connected with the first driving shaft, and the shaft coupling of the second driving member is connected with the second driving shaft.

9. A pole piece slitting apparatus characterized by, The pole piece circular knife cutting assembly comprises the pole piece circular knife cutting structure according to any one of claims 1-8.

10. The pole piece slitting apparatus of claim 9, wherein, Further comprising: a pole piece cutting knife assembly, an upper clamp jaw transverse moving assembly, a lower clamp jaw transverse moving assembly, a belt line assembly, a clamping tension assembly and a pole piece following assembly; the pole piece cutting knife assembly includes a traction roller for pulling a material belt and cutting a pole piece once; the pole piece following assembly is used for adsorbing and conveying the pole piece cut by the pole piece cutting knife assembly to a pole piece receiving table, and the pole piece receiving table is arranged above the lower clamp jaw transverse moving assembly; the clamp jaw of the lower clamp jaw transverse moving assembly is used for dragging the pole piece to be conveyed to the pole piece circular knife cutting assembly, and the clamp jaw of the upper clamp jaw transverse moving assembly is used for feeding the pole piece into the pole piece circular knife cutting assembly; the pole piece circular knife cutting assembly is used for cutting the pole piece twice; the clamping tension assembly is arranged above the belt line assembly and includes an upper clamp jaw and a lower clamp jaw, and the upper clamp jaw and the lower clamp jaw are used for clamping the pole piece cut by the pole piece circular knife cutting assembly and conveying the pole piece to the belt line assembly.

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