Slitting equipment and pole piece processing system

Abstract

The utility model relates to the technical field of slitting processing, and provides slitting equipment and a pole piece processing system. The slitting equipment comprises a first cutter assembly, a second cutter assembly and an electromagnetic heating piece. The first cutter assembly comprises a first cutter. The second cutter assembly comprises a second cutter, a slitting groove is formed in the second cutter assembly, and the second cutter is located on one side of the slitting groove. The electromagnetic heating piece is in magnetic conduction with at least one of the first cutter assembly and the second cutter assembly. The first cutter and the slitting groove are oppositely arranged, and at least part of the cutting edge of the first cutter is located in the slitting groove so that the part to be slit in the slitting groove can be slit. Through the structural arrangement, burrs of the pole piece and the defects of the active material layer can be reduced, and the flatness and the yield of the pole piece are improved.

Description

Technical Field

[0001] This application relates to the technical field of slitting processing, and particularly to a slitting device and a pole piece processing system. Background Art

[0002] During the production of battery pole pieces, active materials need to be coated on the surface of metal foils, and after rolling, they are slit to form pole pieces of appropriate sizes.

[0003] Common pole piece forming processes, such as: disk slitting and die stamping, etc., all utilize the mechanical force formed by tools or dies and act on the pole pieces. After the pole pieces are stressed and undergo plastic deformation, they are separated.

[0004] However, for the pole pieces formed by such processing methods, there are many burrs, and cracks are likely to appear in the active material layer, making it difficult to improve the yield rate of the pole pieces. Summary of the Utility Model

[0005] This application provides a slitting device and a pole piece processing system, which can reduce the burrs of the pole pieces and cracks in the active material layer, and improve the yield rate of the pole pieces.

[0006] To achieve the above object, this application adopts the following technical solutions:

[0007] This application provides a slitting device, including:

[0008] A first tool assembly, the first tool assembly includes a first tool;

[0009] A second tool assembly, the second tool assembly includes a second tool, a slitting groove is formed on the second tool assembly, and the second tool is located on one side of the slitting groove;

[0010] An electromagnetic heating element, the electromagnetic heating element is magnetically conducted to at least one of the first tool assembly and the second tool assembly;

[0011] The first tool is disposed opposite to the slitting groove, and at least a part of the cutting edge of the first tool is located in the slitting groove to slit the workpiece to be slit located in the slitting groove.

[0012] As a possible implementation manner, the electromagnetic heating element and the first tool assembly are magnetically conducted;

[0013] The electromagnetic heating element includes an induction coil and an inverter, and the induction coil is wound around part of the first tool assembly;

[0014] The inverter is electrically connected to the induction coil and an AC power supply respectively.

[0015] As a possible implementation manner, the slitting device further includes an infrared heating box, the infrared heating box has a heating cavity, and the workpiece to be slit is located in the heating cavity.

[0016] As a possible implementation manner, the first tool assembly further includes a first rotating shaft member, the first tool is detachably arranged on the first rotating shaft member, and the first rotating shaft member drives the first tool to rotate around the axis of the first rotating shaft member.

[0017] As a possible implementation manner, the first tool assembly further includes a connecting member and an insulating member, the connecting member is sleeved on the first rotating shaft member, and the first tool is detachably connected to the first rotating shaft member through the connecting member;

[0018] The insulating member wraps the connecting member, and the electromagnetic heating member is arranged on the insulating member.

[0019] As a possible implementation manner, there are multiple first tools, and the multiple first tools are arranged at intervals in sequence along the length direction of the slitting device;

[0020] There are multiple slitting grooves, and the slitting grooves correspond to the first tools one by one.

[0021] As a possible implementation manner, there are multiple second tools, and the multiple second tools are arranged at intervals in sequence along the length direction of the slitting device, and the slitting grooves are formed between adjacent second tools.

[0022] As a possible implementation manner, the second tool includes a stop portion and a slitting portion, and the slitting portion is arranged at at least one end of the stop portion close to the slitting groove;

[0023] The slitting portions of two adjacent second tools are opposite to each other along the length direction of the slitting device.

[0024] As a possible implementation manner, the second tool assembly further includes a second rotating shaft member, the second rotating shaft member extends along the length direction of the slitting device, and each second tool is sequentially connected to the second rotating shaft member along the length direction of the slitting device;

[0025] The second rotating shaft member drives each second tool to rotate around the axis of the second rotating shaft member.

[0026] In the slitting device provided in this application, after at least one of the first tool assembly and the second tool assembly is heated by the electromagnetic heating member, the temperature of the cutting edge of the first tool and the temperature of the second tool can be increased. When slitting the pole piece, the active material layer on the surface of the pole piece can be softened, so as to reduce the formation of cracks in the active material layer, further reduce the burrs after the pole piece is slit, and improve the yield rate of the pole piece.

[0027] In a second aspect, the present application provides a pole piece processing system, which at least includes a coating device, a rolling device, and the slitting device described in the first aspect.

[0028] The pole piece processing system provided by the present application includes the aforementioned slitting device, which can improve the yield rate of pole pieces. Description of the Drawings

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0030] Figure 1 Schematic diagram of the slitting device provided by an embodiment of the present application Figure 1 ;

[0031] Figure 2 Schematic diagram of the slitting device provided by an embodiment of the present application Figure 2 ;

[0032] Figure 3 Schematic diagram of the slitting device provided by an embodiment of the present application Figure 3 。

[0033] Description of the Reference Numerals:

[0034] 100 - slitting device;

[0035] 110 - first tool assembly; 111 - first tool; 112 - first rotating shaft member; 113 - connecting member; 114 - insulating member;

[0036] 120 - second tool assembly; 121 - second tool; 1211 - stop portion; 1212 - slitting portion; 122 - slitting groove; 123 - second rotating shaft member;

[0037] 130 - electromagnetic heating member; 131 - induction coil; 132 - frequency converter;

[0038] 140 - infrared heating box;

[0039] 200 - AC power supply;

[0040] 300 - pole piece. Detailed Embodiments

[0041] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the following will clearly and completely describe the technical solutions in the embodiments of this application with reference to the accompanying drawings in the embodiments of this application. Apparently, the described embodiments are some, but not all, of the embodiments of this application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of this application without creative efforts shall fall within the scope of protection of this application. Without conflict, the following embodiments and the features in the embodiments may be combined with each other.

[0042] During the production of battery electrodes, it is necessary to coat the active material on the surface of the metal foil, and then cut it after rolling to make electrodes of appropriate size.

[0043] Common electrode forming processes, such as: disk cutting and die stamping, etc., all use the mechanical force formed by tools or dies and act on the electrode. After the electrode is stressed and undergoes plastic deformation, it is separated.

[0044] However, the electrodes formed by such processing methods have many burrs, and cracks are likely to appear in the active material layer, making it difficult to improve the yield rate of the electrodes.

[0045] To overcome the defects in the prior art, this application provides a cutting device and an electrode processing system. Among them, the cutting device includes a first tool, a second tool, and an electromagnetic heating element. The electromagnetic heating element is magnetically conductive with at least one of the first tool and the second tool to heat at least one of the first tool and the second tool. The second tool forms a cutting groove, and the cutting edge of the first tool is located in the cutting groove. The electrode is located in the cutting groove to cut the electrode. Cutting the electrode after heating at least one of the first tool and the second tool can quickly soften the surface layer of the electrode, thereby reducing cracks in the active material layer and burrs of the electrode and improving the yield rate.

[0046] The following will describe the content of this application in detail with reference to the accompanying drawings, so that those skilled in the art can understand the content of this application more clearly and in detail.

[0047] Figure 1 Schematic diagram of the cutting device provided by the embodiment of this application Figure 1 . Figure 2 Schematic diagram of the cutting device provided by the embodiment of this application Figure 2 . Figure 3 Schematic diagram of the cutting device provided by the embodiment of this application Figure 3 .

[0048] In the first aspect, referring to Figures 1 - 3 , this application provides a cutting device 100, which can be applied to the cutting process of the electrode 300. Of course, it is also used for the cutting of metal foil. No specific requirements are made in this part.

[0049] The slitting device 100 in this embodiment includes a first cutting tool assembly 110, a second cutting tool assembly 120, and an electromagnetic heating element 130.

[0050] Among them, the first cutting tool assembly 110 includes a first cutting tool 111. The second cutting tool assembly 120 includes a second cutting tool 121. A slitting groove 122 is formed on the second cutting tool assembly 120, and the second cutting tool 121 is located on one side of the slitting groove 122.

[0051] The electromagnetic heating element 130 is magnetically conducted to at least one of the first cutting tool assembly 110 and the second cutting tool assembly 120.

[0052] The first cutting tool 111 is disposed opposite to the slitting groove 122, and at least a part of the cutting edge of the first cutting tool 111 is located in the slitting groove 122 to slit the workpiece to be slit located in the slitting groove 122.

[0053] In this way, after at least one of the first cutting tool assembly 110 and the second cutting tool assembly 120 is heated by the electromagnetic heating element 130, the temperature of the cutting edge of the first cutting tool 111 and the temperature of the second cutting tool 121 can be increased. During slitting, the first cutting tool 111 and the second cutting tool 121 can soften the active material layer on the surface of the pole piece 300, thereby reducing the formation of cracks in the active material layer, further reducing the burrs after the pole piece 300 is slit, and improving the yield rate of the pole piece 300.

[0054] The following will respectively elaborate in detail on the specific structure of the slitting device 100 and various possible implementation manners.

[0055] It is not difficult to understand that the electromagnetic heating element 130 can be magnetically conducted only with the first cutting tool assembly 110 to heat the first cutting tool assembly 110 through the magnetic field generated by the electromagnetic heating element 130, and the overall temperature of the first cutting tool assembly 110 can be increased to 600 - 800 °C. Correspondingly, after the temperature of the first cutting tool 111 in the first cutting tool assembly 110 rises, the cutting edge of the first cutting tool 111 can soften the surface of the pole piece 300. In this way, under the shearing force of the first cutting tool 111 and the second cutting tool 121, the pole piece 300 can quickly undergo plastic deformation to complete the slitting operation.

[0056] During this process, since the surface of the pole piece 300 is softened, it can effectively prevent cracks from appearing in the active material layer, reduce the generation of material loss or burrs in the active material layer, and both the flatness and the yield rate of the slit pole piece 300 can be improved.

[0057] Feasible. The electromagnetic heating element 130 can be magnetically conducted only with the second tool assembly 120. In this way, the temperature of the second tool assembly 120 increases, and heat conduction is formed between the second tool assembly 120 and the electrode sheet 300 to be slit, further increasing the overall temperature of the electrode sheet 300, achieving softening of the electrode sheet 300, and completing the slitting of the electrode sheet 300 under the cooperation of the first tool 111 and the second tool 121. Similarly, by arranging the electromagnetic heating element 130 on the second tool assembly 120, it is also possible to prevent cracks and material loss in the active material layer of the electrode sheet 300 during the slitting process, and also reduce the generation of burrs, thereby improving the flatness and yield rate of the slit electrode sheet 300.

[0058] Of course, the electromagnetic heating element 130 can also be magnetically conducted with both the first tool assembly 110 and the second tool assembly 120 at the same time. In this way, both the first tool assembly 110 and the second tool assembly 120 can be heated, and it is possible to soften both surfaces in the thickness direction of the electrode sheet 300 at the same time, further improving the flatness and yield rate of the electrode sheet 300.

[0059] Possibly, the electromagnetic heating element 130 is magnetically conducted with the first tool assembly 110; the electromagnetic heating element 130 includes an induction coil 131 and a frequency converter 132, and the induction coil 131 is wound around a part of the first tool assembly 110; the frequency converter 132 is electrically connected to the induction coil 131 and the AC power supply 200 respectively.

[0060] In this way, the electromagnetic heating element 130 converts the voltage of the AC power supply 200 through the frequency converter 132 to form adjustable high-frequency alternating current. The high-frequency alternating current passes through the induction coil 131, further forming a high-frequency induction magnetic field. Since the direction of the high-frequency magnetic field constantly changes, eddy currents are formed in the first tool assembly 110. The eddy currents cause the carriers in the first tool assembly 110 to move at high speed and randomly, and the carriers collide with atoms, generating heat by friction, thereby improving the heating efficiency of the first tool assembly 110 and further improving the slitting efficiency of the electrode sheet 300.

[0061] Possibly, the slitting device 100 further includes an infrared heating box 140. The infrared heating box 140 has a heating cavity, and the workpiece to be slit is located in the heating cavity.

[0062] In this way, the infrared rays emitted by the infrared heating box 140 are irradiated onto the pole piece 300 to be slit. When the frequency of the incident infrared rays is the same as the natural frequency of the molecules of the pole piece 300 to be slit, a resonance phenomenon occurs inside the pole piece 300 to be slit. The amplitudes of the vibrations and rotations of the molecules and atoms of the pole piece 300 to be slit increase, generating heat, realizing the heating of the pole piece 300 to be slit, softening the surface of the pole piece 300 to be slit, making it easier to slit, and thus improving the processing efficiency. At the same time, under the combined action of the first tool assembly 110 and the second tool assembly 120, the burrs of the pole piece 300 after slitting are reduced, preventing the active material layer on the surface of the pole piece 300 from falling off or cracking.

[0063] In addition, during the slitting process of the first tool assembly 110 and the second tool assembly 120, since the contact time between the first tool 111 and the second tool 121 and the pole piece 300 is short, there may be insufficient heating time at the slitting position of the pole piece 300. Although heating at least one of the first tool assembly 110 and the second tool assembly 120 by the electromagnetic heating element 130 can improve the flatness of the pole piece 300, it is still inevitable that burrs will appear after the pole piece 300 is slit.

[0064] Therefore, in this embodiment, on the basis of the magnetic conduction between at least one of the first tool assembly 110 and the second tool assembly 120 and the electromagnetic heating element 130, the infrared heating box 140 is used to heat the pole piece 300 to be slit in advance, so that the pole piece 300 to be slit has sufficient heating time in the heating cavity, the heating effect is controllable, further reducing the generation of the above defects, and thus improving the flatness and yield rate of the pole piece 300.

[0065] It can be understood that after the pole piece 300 to be slit is heated, it is easy to slit, and the slitting operation efficiency of the pole piece 300 can also be improved. In this way, the energy utilization rate can also be improved and the system energy consumption can be reduced.

[0066] It should be noted that the infrared heating box 140 can heat the pole piece 300 to be slit to 300 - 500 °C.

[0067] Possibly, the first tool assembly 110 further includes a first rotating shaft member 112. The first tool 111 is detachably arranged on the first rotating shaft member 112, and the first rotating shaft member 112 drives the first tool 111 to rotate around the axis of the first rotating shaft member 112.

[0068] In this way, the first tool 111 and the first rotating shaft member 112 are detachably connected for the disassembly and maintenance of the first tool 111. The first tool 111 rotates with the first rotating shaft member 112, so that the cutting edge of the first tool 111 rotates cyclically and acts on the pole piece 300 to be slit.

[0069] Possibly, the first tool assembly 110 further includes a connecting member 113 and an insulating member 114. The connecting member 113 is sleeved on the first rotating shaft member 112, and the first tool 111 is detachably connected to the first rotating shaft member 112 through the connecting member 113; the insulating member 114 wraps the connecting member 113, and the electromagnetic heating member 130 is disposed on the insulating member 114.

[0070] See Figures 1 - 3 , the first rotating shaft member 112 extends along the length direction of the slitting device 100. The connecting member 113 can be a cylindrical member. In this way, the connecting member 113 is sleeved on the first rotating shaft member 112 and is stably connected relative to the first rotating shaft member 112 to rotate with the rotation of the first rotating shaft member 112. It should be noted that the connecting member 113 and the first rotating shaft member 112 can also be stably connected through a detachable connection structure. For example, hole-shaft fit, key connection, etc.

[0071] In this way, the first tool 111 can be detachably connected to the first rotating shaft member 112 through the connecting member 113, so as to facilitate the installation, disassembly, maintenance and replacement of the first tool 111, which helps to improve the working efficiency of the slitting device 100. It should be noted that the first tool 111 and the connecting member 113 can be relatively fixedly connected. In this way, the first tool and the connecting member 113 form a complete independent component as a spare part, which is convenient for overall replacement. Furthermore, the first tool 111 and the connecting member 113 can also be detachably connected. When the first tool 111 is damaged, it is convenient to replace the first tool 111, thereby reducing the maintenance cost of the slitting device 100.

[0072] When the electromagnetic heating member 130 and the first tool assembly 110 are electrically connected, the induction coil 131 in the electromagnetic heating member 130 is wound around a part of the first tool assembly 110. Specifically, the induction coil 131 can be disposed on a part of the first rotating shaft member 112. Further, in order to prevent the induction coil 131 from being electrically connected to the first rotating shaft member 112 and the connecting member 113 sleeved on the first rotating shaft member 112, an insulating member 114 can be sleeved on the outer wall surface of the connecting member 113 facing away from the first rotating shaft member 112. In this way, the induction coil 131 is wound on the insulating member 114, which can not only form an induction magnetic field to heat the first tool assembly 110, but also improve the insulation and safety of the slitting device 100.

[0073] In some embodiments, there are multiple first tools 111, and the multiple first tools 111 are arranged at intervals in sequence along the length direction of the slitting device 100; there are multiple slitting grooves 122, and the slitting grooves 122 correspond to the first tools 111 one by one. In this way, the slitting efficiency of the pole piece 300 is improved.

[0074] It is not difficult to understand that the pole piece 300 to be slit travels between the first tool 111 and the second tool 121, and is slit and formed under the interaction of the first tool 111 and the second tool 121. A plurality of first tools 111 are arranged at intervals in sequence along the length direction of the slitting device 100, and the distance between two adjacent first tools 111 is related to the slitting size and slitting position of the pole piece 300. Correspondingly, the slitting grooves 122 correspond to the first tools 111, and part of the cutting edges of the first tools 111 are located in the corresponding slitting grooves 122. A plurality of first tools 111 operate simultaneously, improving the slitting efficiency of the pole piece 300.

[0075] Furthermore, referring to Figure 3 , there are a plurality of second tools 121, and the plurality of second tools 121 are arranged at intervals in sequence along the length direction of the slitting device 100, and slitting grooves 122 are formed between adjacent second tools 121.

[0076] It should be noted that in this part, the slitting grooves 122 are formed by adjacent second tools 121, and the cutting edges of the first tools 111 are in the slitting grooves 122 and interact with the opposite ends of two adjacent second tools 121, realizing the slitting operation of the pole piece 300 and improving the slitting operation efficiency of the pole piece 300 at the same time.

[0077] Exemplarily, the second tool 121 includes a stop portion 1211 and a slitting portion 1212, and the slitting portion 1212 is arranged at at least one end of the stop portion 1211 close to the slitting groove 122; the slitting portions 1212 of two adjacent second tools 121 are opposite to each other along the length direction of the slitting device 100. In this way, it is convenient for the installation and positioning of the second tool 121, improving the slitting accuracy of the pole piece 300, and it is also convenient for the disassembly, maintenance and replacement of the second tool 121, so as to improve the flexibility of the slitting device 100 and further improve the operation efficiency of the slitting device 100.

[0078] It is not difficult to understand that the slitting portions 1212 can be arranged at both ends of the stop portion 1211 along the length direction of the slitting device 100 at the same time, or the slitting portion 1212 is arranged only at one end of the stop portion 1211. A plurality of second tools 121 are arranged at intervals in sequence along the length direction of the slitting device 100, and slitting grooves 122 are formed between adjacent second tools 121, and the slitting portions 1212 of each second tool 121 are located on both sides of the slitting groove 122, so as to cooperate with the first tool 111 to complete the slitting of the pole piece 300.

[0079] In some embodiments, the slitting portion 1212 and the stop portion 1211 can be fixedly connected relatively to form a complete independent component, which can be used as a spare part for the disassembly, installation and replacement of the second tool 121, improving the production and assembly efficiency of the slitting device 100.

[0080] Possibly, the second tool assembly 120 further includes a second rotating shaft member 123. The second rotating shaft member 123 extends along the length direction of the slitting device 100, and each second tool 121 is sequentially connected to the second rotating shaft member 123 along the length direction of the slitting device 100; the second rotating shaft member 123 drives each second tool 121 to rotate around the axis of the second rotating shaft member 123. In this way, the rotation of the first rotating shaft member 112 and the second rotating shaft member 123 drives the pole piece 300 to travel rapidly between the first tool 111 and the second tool 121, thereby improving the slitting efficiency of the pole piece 300.

[0081] The present application provides a slitting device 100, including a first tool assembly 110, a second tool assembly 120, and an electromagnetic heating member 130. Among them, the first tool assembly 110 includes a first tool 111. The second tool assembly 120 includes a second tool 121, a slitting groove 122 is formed on the second tool assembly 120, and the second tool 121 is located on one side of the slitting groove 122. The electromagnetic heating member 130 is magnetically conducted to at least one of the first tool assembly 110 and the second tool assembly 120. The first tool 111 is disposed opposite to the slitting groove 122, and at least a part of the cutting edge of the first tool 111 is located in the slitting groove 122 to slit the workpiece to be slit located in the slitting groove 122. Through such a structural arrangement, burrs on the pole piece 300 and defects in the active material layer can be reduced, and the flatness and yield rate of the pole piece 300 can be improved.

[0082] In a second aspect, the present application can provide a pole piece 300 processing system, at least including a coating device, a rolling device, and the slitting device 100 in the first aspect above.

[0083] Since the pole piece 300 processing system provided by the present application includes the slitting device 100 in the first aspect, the flatness and yield rate of the pole piece 300 can be improved.

[0084] It should be noted that phrases such as "an embodiment", "embodiment", "exemplary embodiment", "some embodiments", etc. mentioned in the specification indicate that the described embodiment may include specific features, structures, or characteristics, but not necessarily every embodiment includes such specific features, structures, or characteristics. In addition, such phrases do not necessarily refer to the same embodiment. Moreover, when combining specific features, structures, or characteristics with an embodiment, implementing such features, structures, or characteristics in combination with other embodiments, whether explicitly or implicitly described, is within the knowledge scope of those skilled in the art.

[0085] In general, terms should be understood, at least in part, in light of their use in the context. For example, at least in part depending on the context, the term "one or more" as used herein can be used to describe any feature, structure, or property in the sense of a singular meaning, or can be used to describe a combination of features, structures, or properties in the sense of a plural meaning. Similarly, at least in part depending on the context, terms such as "a" or "the" can also be understood to convey a singular usage or a plural usage.

[0086] It should be readily understood that the terms "on", "above", and "over" in this application should be construed in the broadest manner such that "on" not only means "directly on something", but also includes the meaning of "on something" with intervening features or layers therebetween, and "above" or "over" not only includes the meaning of "above" or "over something", but can also include the meaning of "above" or "over something" with no intervening features or layers therebetween (i.e., directly on something).

[0087] In addition, spatial relative terms may be used herein for convenience of description, such as "below", "beneath", "under", "above", "over", etc., to describe the relationship of one element or feature to another element or feature as shown in the figures. Spatial relative terms are intended to encompass different orientations of the device in use or operation other than the orientation shown in the figures. The device may have other orientations (rotated 90° or at other orientations), and the spatial relative descriptive terms used herein may be interpreted accordingly.

[0088] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and are not intended to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A slitting device (100), characterized in that, Comprising: A first tool assembly (110), the first tool assembly (110) including a first tool (111); A second tool assembly (120), the second tool assembly (120) including a second tool (121), a slitting groove (122) being formed on the second tool assembly (120), and the second tool (121) being located on one side of the slitting groove (122); An electromagnetic heating element (130), the electromagnetic heating element (130) being magnetically conducted to at least one of the first tool assembly (110) and the second tool assembly (120); The first tool (111) is disposed opposite to the slitting groove (122), and at least a part of the cutting edge of the first tool (111) is located within the slitting groove (122) to slit a workpiece to be slit located within the slitting groove (122).

2. The slitting device (100) according to claim 1, characterized in that, The electromagnetic heating element (130) and the first tool assembly (110) are magnetically conducted; The electromagnetic heating element (130) includes an induction coil (131) and a frequency converter (132), and the induction coil (131) is wound around a part of the first tool assembly (110); The frequency converter (132) is electrically connected to the induction coil (131) and an AC power supply (200) respectively.

3. The slitting device (100) according to claim 1, characterized in that, It further includes an infrared heating box (140), the infrared heating box (140) having a heating chamber, and the workpiece to be slit is located within the heating chamber.

4. The slitting device (100) according to any one of claims 1-3, characterized in that The first tool assembly (110) further includes a first rotating shaft member (112), the first tool (111) being detachably disposed on the first rotating shaft member (112), and the first rotating shaft member (112) driving the first tool (111) to rotate around the axis of the first rotating shaft member (112).

5. The slitting device (100) according to claim 4, characterized in that, The first tool assembly (110) further includes a connecting member (113) and an insulating member (114), the connecting member (113) being sleeved on the first rotating shaft member (112), and the first tool (111) being detachably connected to the first rotating shaft member (112) through the connecting member (113); The insulating member (114) wraps the connecting member (113), and the electromagnetic heating element (130) is disposed on the insulating member (114).

6. The slitting device (100) according to any one of claims 1-3, characterized in that, There are multiple first tools (111), and the multiple first tools (111) are sequentially arranged at intervals along the length direction of the slitting device (100); There are multiple slitting grooves (122), and the slitting grooves (122) and the first tools (111) are in one-to-one correspondence.

7. The slitting device (100) according to claim 6, characterized in that, There are multiple second tools (121), and the multiple second tools (121) are sequentially arranged at intervals along the length direction of the slitting device (100), and the slitting grooves (122) are formed between adjacent second tools (121).

8. The slitting device (100) according to claim 7, characterized in that, The second tool (121) includes a stop portion (1211) and a slitting portion (1212), and the slitting portion (1212) is disposed at at least one end of the stop portion (1211) close to the slitting groove (122); The slitting parts (1212) of two adjacent second tools (121) face each other along the length direction of the slitting device (100).

9. The slitting device (100) according to claim 7, wherein, The second tool assembly (120) further includes a second rotating shaft member (123), the second rotating shaft member (123) extends along the length direction of the slitting device (100), and each of the second tools (121) is sequentially connected to the second rotating shaft member (123) along the length direction of the slitting device (100); The second rotating shaft member (123) drives each of the second tools (121) to rotate around the axis of the second rotating shaft member (123).

10. A pole piece processing system, characterized in that, At least includes a coating device, a rolling device and the slitting device (100) according to any one of claims 1-9.

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