Die cutting roller assembly and die cutting device

Abstract

The utility model discloses a die cutting roller assembly and a die cutting device, and relates to the technical field of battery production equipment, the die cutting roller assembly comprises a first driving roller and a second driving roller; the first transmission roller is sleeved with a cutter. The second transmission roller is sleeved with a supporting ring, the supporting ring and the cutter are oppositely arranged, the position between the supporting ring and the cutter is configured to allow the pole piece to penetrate through, and the supporting ring is configured to support the pole piece. According to the technical scheme provided by the utility model, the problem that the slit pole piece is easy to generate burrs and powder can be solved.

Description

Technical Field

[0001] This utility model relates to the field of battery production equipment technology, and in particular to a die-cutting roller assembly and a die-cutting device. Background Technology

[0002] In the preparation process of battery electrodes, after coating, the electrodes need to be slit. For different requirements on electrode size, the position of the cutter is generally adjusted by using spacers, thereby adjusting the width of the electrode slit.

[0003] In related technologies, the upper and lower cutting blades for electrode slitting typically use suspended die-cutting molds with beveled blades. The outer diameter of the upper and lower spacers is generally smaller than the outer diameter of the blades. Since the spacers are made of metal, increasing the outer diameter of the spacers would increase friction between the spacers and the blades, potentially damaging the blades. However, because the outer diameter of the spacers is much smaller than the outer diameter of the blades, the electrodes are suspended during slitting. Due to the lack of support at the bottom of the electrodes, the slitting electrodes are prone to burrs and powdering. Utility Model Content

[0004] In view of the above problems, this application provides a die-cutting roller assembly and a die-cutting device, which aims to solve the problems of burrs and powder shedding that are easily generated in the slit electrode sheets.

[0005] This application provides a die-cutting roller assembly, including a first drive roller and a second drive roller; the first drive roller is fitted with a cutter; the second drive roller is fitted with a support ring, the support ring is disposed opposite to the cutter, and the support ring and the cutter are configured to allow an electrode sheet to pass through, and the support ring is configured to support the electrode sheet.

[0006] In the technical solution of this application embodiment, the present invention eliminates the need for a cutter on the second transmission roller by providing a support ring on the second transmission roller, with the support ring positioned opposite to the cutter on the first transmission roller. When slitting the electrode sheet, the electrode sheet passes through the gap between the support ring and the cutter. The support ring supports the electrode sheet while the cutter slits it. Therefore, the electrode sheet is not suspended during slitting, thus solving the problem of burrs and powder shedding from the slit electrode sheet, thereby reducing the impact on product quality.

[0007] In some embodiments, the first drive roller is further fitted with a plurality of first spacers, which are distributed on both sides of the cutter; the second drive roller is further fitted with a plurality of second spacers, which are distributed on both sides of the support ring. This design allows for adjustment of the cutter's position by increasing or decreasing the number of first spacers on both sides of the cutter, while also limiting the cutter's movement using the first spacers to improve its stability during the slitting process. Similarly, the position of the support ring can be adjusted by increasing or decreasing the number of second spacers on both sides of the support ring, while also limiting its movement using the second spacers to improve the support ring's stability in supporting the electrode sheet. Therefore, by adjusting the distribution of the first and second spacers, the positions of the cutter and the support ring can be adjusted, thereby enabling the slitting of electrode sheets of different widths.

[0008] In some embodiments, the outer diameter of the two second spacers adjacent to the support ring gradually decreases from near to far from the support ring. This design is advantageous because the electrode sheet shrinks towards the center during slitting. By making the outer diameter of the second spacers adjacent to the support ring gradually decrease from near to far from the support ring—that is, the outer diameter of the support ring is larger than the outer diameter of the adjacent second spacers—the surfaces of the support ring and the two adjacent second spacers form outward-facing convex arc surfaces. When the electrode sheet passes through the gap between the support ring and the cutter, these convex arc surfaces help to unfold the electrode sheet, thereby achieving better slitting.

[0009] In some embodiments, a first positioning ring and a first locking sleeve are respectively provided at both ends of the first drive roller, and the first spacer and the cutter are limited between the first positioning ring and the first locking sleeve. With this design, during installation, the first positioning ring can be fitted onto one end of the first drive roller, then the first spacer and the cutter can be fitted onto the first drive roller, and finally the first locking sleeve can be used to lock them onto the first drive roller. This method uses the first positioning ring and the first locking sleeve to clamp the first spacer and the cutter, improving the installation reliability of the first spacer and the cutter, thereby enhancing the stability of the cutter during the slitting process.

[0010] In some embodiments, the second drive roller is provided with a second positioning ring and a second locking sleeve at both ends, and the second spacer and the support ring are located between the second positioning ring and the second locking sleeve. This design allows for the installation of the second drive roller by fitting the second positioning ring onto one end, then fitting the second spacer and the support ring onto the second drive roller, and finally locking them onto the second drive roller with the second locking sleeve. This clamping of the second spacer and the support ring with the second positioning ring and the second locking sleeve improves the installation reliability of the second spacer and the support ring, thereby enhancing the support effect of the support ring on the electrode sheet.

[0011] In some embodiments, the first drive roller is further fitted with a blade holder, and the cutter is fitted onto the blade holder; the second drive roller is further fitted with a mounting bracket, and the support ring is fitted onto the mounting bracket. This design allows the cutter to be fitted onto the blade holder first, and then the blade holder to be fitted onto the first drive roller during installation, improving the reliability of the cutter's installation and facilitating its assembly and disassembly. Similarly, during installation, the support ring can be fitted onto the mounting bracket first, and then the mounting bracket to the second drive roller, improving the reliability of the support ring's installation and facilitating its assembly and disassembly.

[0012] In some embodiments, the tool holder is slidably connected to the first drive roller, and the tool holder can slide along the axial direction of the first drive roller; the mounting bracket is slidably connected to the second drive roller, and the mounting bracket can slide along the axial direction of the second drive roller. This design allows the tool holder to be slidably mounted on the first drive roller along its axial direction during installation, facilitating the assembly and disassembly of the tool holder and the cutting blade; similarly, the support bracket can be slidably mounted on the second drive roller along its axial direction during installation, facilitating the assembly and disassembly of the mounting bracket and the support ring.

[0013] In some embodiments, one of the inner sidewall of the cutter holder and the outer sidewall of the first transmission roller is provided with a first transmission block, and the other is provided with a first transmission groove. The first transmission block and the first transmission groove extend along the axial direction of the first transmission roller, and the first transmission block and the first transmission groove are slidably engaged. With this design, when the cutter holder is slidably mounted on the first transmission roller along the axial direction of the first transmission roller, the cutter holder can be guided and positioned by the cooperation of the first transmission block and the second transmission groove, which can prevent the cutter holder and the cutter from rotating relative to the first transmission roller and improve the cutting effect of the cutter on the electrode sheet.

[0014] In some embodiments, one of the inner sidewall of the mounting bracket and the outer sidewall of the second drive roller is provided with a second drive block, and the other is provided with a second drive groove. The second drive block and the second drive groove extend along the axial direction of the second drive roller, and the second drive block and the second drive groove are slidably engaged. With this design, when the mounting bracket is slidably mounted on the second drive roller along its axial direction, the second drive block and the second drive groove can guide and position the mounting bracket, preventing rotation of the mounting bracket and the support ring relative to the second drive roller and improving the support effect of the support ring on the electrode sheet.

[0015] In some embodiments, an inner ring spacer is fitted onto one end of the mounting bracket, and the support ring abuts against the inner ring spacer. This design allows the support ring to be fitted onto the mounting bracket, and the inner ring spacer limits the position of the support ring, thereby improving the installation reliability of the support ring and thus enhancing the support effect of the support ring on the electrode.

[0016] In some embodiments, a retaining ring is provided at one end of the blade holder, and one end face of the cutter abuts against the retaining ring. The blade holder is also fitted with a retaining ring, which abuts against the end face of the cutter away from the retaining ring. This design allows for easy installation and removal of the cutter by first fitting the cutter onto the blade holder so that one end face of the cutter abuts against the retaining ring, and then fitting the retaining ring onto the blade holder, using the retaining ring and retaining ring to clamp the cutter.

[0017] In some embodiments, the retaining ring is threaded onto the blade holder. This design allows the retaining ring to be gradually tightened onto the blade holder during installation, clamping the cutter between the retaining ring and the retaining ring; during disassembly, the retaining ring can be unscrewed from the blade holder to remove the cutter, thus facilitating the installation and removal of the cutter.

[0018] In some embodiments, an elastic ring is provided between the retaining ring and the cutter. This design allows the elastic ring itself to compress the cutter, effectively preventing the cutter from loosening during electrode slitting, thereby improving the stability of the cutter's use.

[0019] In some embodiments, the outer wall of the support ring is provided with a clearance groove. This design, with the clearance groove, reduces the area of ​​direct contact between the cutter and the support ring when the cutter penetrates the electrode, thereby reducing the cutting of the support ring by the cutter and reducing wear on the cutter, which can improve the service life of both the cutter and the support ring.

[0020] In some embodiments, the support ring is made of rubber or nylon. This design, with the rubber or nylon component, can effectively support the electrode sheet while preventing wear on the cutter during the slitting process, thus protecting the cutter and extending its service life.

[0021] In some embodiments, the axial direction of the first drive roller is parallel to the axial direction of the second drive roller. This design allows the first and second drive rollers to rotate synchronously using the same drive equipment, which can improve the cutting accuracy of the electrode sheets.

[0022] This application also provides a die-cutting apparatus, including the above-mentioned die-cutting roller assembly, frame and drive mechanism; the die-cutting roller assembly is disposed on the frame; the drive mechanism is disposed on the frame, and the drive mechanism drives the first transmission roller and the second transmission roller of the die-cutting roller assembly to rotate.

[0023] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the other objects, features and advantages of this application more obvious and understandable, specific embodiments of this application are given below. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the structure of an embodiment of the die-cutting roller assembly of this application;

[0026] Figure 2 This is a partial structural schematic diagram of an embodiment of the die-cutting roller assembly of this application;

[0027] Figure 3 This is a partial exploded view of an embodiment of the die-cutting roller assembly of this application;

[0028] Figure 4 This is a partial exploded view of an embodiment of the die-cutting roller assembly of this application;

[0029] Figure 5 This is a partial exploded view of another embodiment of the die-cutting roller assembly of this application.

[0030] Explanation of icon numbers:

[0031] label name label name 100 Die-cutting roller assembly 182 First screw head 10 First drive roller 20 Second drive roller 11 Cutter 21 support circle 12 knife holder 211 clearance slot 121 First transmission block 22 Mounting rack 122 First transmission groove 221 Second transmission block 13 bezel 222 Second transmission groove 14 retaining ring 23 Inner ring spacer 15 elastic band 24 Second spacer 16 First spacer 25 Second positioning circle 17 First positioning circle 26 Second locking sleeve 18 First locking sleeve 261 Second pressure plate 181 First pressing plate 262 Second screw head

[0032] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0033] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0035] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0036] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0037] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0038] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0039] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0040] Lithium-ion power batteries, as a new type of rechargeable battery, have advantages such as high energy density and power density, high operating voltage, light weight, small size, long cycle life, good safety, and environmental friendliness. They have broad application prospects in portable electrical appliances, power tools, large-scale energy storage, and electric transportation power supplies.

[0041] In the preparation process of battery electrodes, after coating, the electrodes need to be slit. For different requirements on electrode size, the position of the cutter is generally adjusted by using spacers, thereby adjusting the width of the electrode slit.

[0042] In related technologies, the upper and lower cutting blades for electrode slitting typically use suspended die-cutting molds with beveled blades. The outer diameter of the upper and lower spacers is generally smaller than the outer diameter of the blades. Since the spacers are made of metal, increasing the outer diameter of the spacers would increase friction between the spacers and the blades, potentially damaging the blades. However, because the outer diameter of the spacers is much smaller than the outer diameter of the blades, the electrodes are suspended during slitting. Due to the lack of support at the bottom of the electrodes, the slitting electrodes are prone to burrs and powdering.

[0043] Based on the above problems, this utility model proposes a die-cutting roller assembly 100, which aims to solve the problem that the cut electrode sheets are prone to burrs and powder shedding.

[0044] Please see Figures 1 to 4 In one embodiment of the present invention, the die-cutting roller assembly 100 includes a first transmission roller 10 and a second transmission roller 20; the first transmission roller 10 is fitted with a cutter 11; the second transmission roller 20 is fitted with a support ring 21, the support ring 21 is disposed opposite to the cutter 11, and the support ring 21 and the cutter 11 are configured to allow the electrode sheet to pass through, and the support ring 21 is configured to support the electrode sheet.

[0045] Understandably, both the first drive roller 10 and the second drive roller 20 have a cylindrical structure. The first drive roller 10 is used to mount and fix the cutter 11. The rotation of the first drive roller 10 can drive the cutter 11 to rotate, so as to realize the cutting of the electrode sheet; the second drive roller 20 is used to mount and fix the support ring 21. The rotation of the second drive roller 20 can drive the support ring 21 to rotate, so as to effectively support the cut electrode sheet through the support ring 21.

[0046] In practical applications, the cutter 11 can be directly mounted on the first transmission roller 10, or it can be mounted on the first transmission roller 10 through the cutter holder 12 or other structures.

[0047] In practical applications, the support ring 21 can be directly fitted onto the second drive roller 20, or it can be fitted onto the second drive roller 20 through the mounting bracket 22 or other structures.

[0048] Furthermore, the cutter 11 can be relatively fixed on the first transmission roller 10, and the support ring 21 can be relatively fixed on the second transmission roller 20, that is, the positions of the cutter 11 and the support ring 21 are not adjustable; or, the cutter 11 can also be relatively slidably disposed on the first transmission roller 10, and the support ring 21 can also be relatively slidably disposed on the second transmission roller 20, that is, the positions of the cutter 11 and the support ring 21 are adjustable.

[0049] In summary, the technical solution of this application eliminates the need for a cutter 11 on the second transmission roller 20 by providing a support ring 21 on the second transmission roller 20, with the support ring 21 positioned opposite to the cutter 11 on the first transmission roller 10. When slitting the electrode sheet, the electrode sheet passes through the gap between the support ring 21 and the cutter 11. The support ring 21 supports the electrode sheet while the cutter 11 slits it. Therefore, the electrode sheet is not suspended during slitting, thus solving the problem of burrs and powder shedding from the slit electrode sheet, thereby reducing the impact on product quality.

[0050] Please see Figure 1 In one embodiment of the present invention, the first transmission roller 10 is further fitted with a plurality of first spacers 16, which are distributed on both sides of the cutter 11; the second transmission roller 20 is further fitted with a plurality of second spacers 24, which are distributed on both sides of the support ring 21.

[0051] This design allows for adjustment of the position of the cutter 11 by increasing or decreasing the number of first spacers 16 on both sides of the cutter 11. Simultaneously, the first spacers 16 can limit the movement of the cutter 11, improving its stability during the cutting process. Similarly, the position of the support ring 21 can be adjusted by increasing or decreasing the number of second spacers 24 on both sides of the support ring 21. The second spacers 24 can also limit the movement of the support ring 21, enhancing its support stability for the electrode sheet. Therefore, by adjusting the distribution of the first spacers 16 and the second spacers 24, the positions of the cutter 11 and the support ring 21 can be adjusted, enabling the cutting of electrode sheets of different widths.

[0052] As some examples, the axial length of the first spacer 16 can be between 125mm and 130mm, specifically 125mm, 125.5mm, 126mm, 126.5mm, 127mm, 127.5mm, 128mm, 129mm, 130mm, etc.

[0053] The axial length of the second spacer 24 can be between 120mm and 140mm, specifically 120mm, 125mm, 127.5mm, 130mm, 134.5mm, 138mm, 140mm, etc.

[0054] Please see Figure 1 In the two second spacers 24 adjacent to the support ring 21, the outer diameter of the second spacer 24 gradually decreases from the direction closer to the support ring 21 to the direction farther away from the support ring 21.

[0055] Understandably, the outer diameter of the support ring 21 is larger than the outer diameter of the adjacent second spacer 24.

[0056] In this design, the electrode sheets shrink towards the center during slitting. Therefore, by gradually decreasing the outer diameter of the second spacer 24 adjacent to the support ring 21 from near to far from the support ring 21 (i.e., the outer diameter of the support ring 21 is larger than the outer diameter of the adjacent second spacer 24), the surface of the support ring 21 and the surfaces of the two adjacent second spacers 24 form an outward convex arc surface. When the electrode sheet passes through the gap between the support ring 21 and the cutter 11, this convex arc surface can unfold the electrode sheet, thereby achieving better slitting.

[0057] Please see Figure 1 In one embodiment of the present invention, the first transmission roller 10 is provided with a first positioning ring 17 and a first locking sleeve 18 at both ends, and the first spacer 16 and the cutter 11 are limited between the first positioning ring 17 and the first locking sleeve 18.

[0058] With this design, during installation, a first positioning ring 17 can be fitted onto one end of the first drive roller 10, then the first spacer 16 and the cutter 11 can be fitted onto the first drive roller 10, and finally the first locking sleeve 18 can be used to lock the first drive roller 10. The first positioning ring 17 and the first locking sleeve 18 can clamp the first spacer 16 and the cutter 11, which can improve the installation reliability of the first spacer 16 and the cutter 11, thereby improving the stability of the cutter 11 during the slitting process.

[0059] Optionally, the first locking sleeve 18 may include a first pressure plate 181 and a first screw head 182. After the first spacer 16 and the cutter 11 are fitted onto the first transmission roller 10, the first pressure plate 181 is fitted onto the first transmission roller 10, and then the first screw head 182 is used to tighten it onto the first transmission roller 10, which can improve the locking stability of the first spacer 16 and the cutter 11.

[0060] For example, the first screw head 182 can be an external hexagonal screw head.

[0061] Please see Figure 1 In one embodiment of the present invention, the two ends of the second transmission roller 20 are respectively provided with a second positioning ring 25 and a second locking sleeve 26, and the second spacer 24 and the support ring 21 are limited between the second positioning ring 25 and the second locking sleeve 26.

[0062] With this design, during installation, a second positioning ring 25 can be fitted onto one end of the second drive roller 20, then the second spacer 24 and the support ring 21 can be fitted onto the second drive roller 20, and finally the second locking sleeve 26 can be used to lock it onto the second drive roller 20. The second positioning ring 25 and the second locking sleeve 26 can clamp the second spacer 24 and the support ring 21, which can improve the installation reliability of the second spacer 24 and the support ring 21, thereby improving the support effect of the support ring 21 on the electrode sheet.

[0063] Optionally, the second locking sleeve 26 may include a second pressure plate 261 and a second screw head 262. After the second spacer 24 and the support ring 21 are fitted onto the second transmission roller 20, the second pressure plate 261 is fitted onto the second transmission roller 20, and then the second screw head 262 is used to tighten it onto the second transmission roller 20, which can improve the locking stability of the second spacer 24 and the support ring 21.

[0064] For example, the second screw head 262 can also be an external hexagonal screw head.

[0065] Please see Figures 2 to 4 In one embodiment of the present invention, the first transmission roller 10 is further fitted with a knife holder 12, and the cutter 11 is fitted on the knife holder 12; the second transmission roller 20 is further fitted with a mounting frame 22, and the support ring 21 is fitted on the mounting frame 22.

[0066] Understandably, the cutter 11 is mounted on the first drive roller 10 via the cutter holder 12; the support ring 21 is mounted on the second drive roller 20 via the mounting bracket 22.

[0067] This design allows for the following installation process: the cutter 11 can be mounted on the cutter holder 12 first, and then the cutter holder 12 can be mounted on the first transmission roller 10. This improves the installation reliability of the cutter 11 and facilitates its assembly and disassembly. Similarly, during installation, the support ring 21 can be mounted on the mounting bracket 22 first, and then the mounting bracket 22 can be mounted on the second transmission roller 20. This improves the installation reliability of the support ring 21 and facilitates its assembly and disassembly.

[0068] In practical applications, the cutter 11 can be fixed to the cutter holder 12 by clamping, snapping, or screw connection. Similarly, the support ring 21 can also be fixed to the mounting bracket 22 by clamping, snapping, or screw connection.

[0069] Please see Figure 2 In one embodiment of the present invention, the tool holder 12 is slidably connected to the first transmission roller 10, and the tool holder 12 can slide along the axial direction of the first transmission roller 10; the mounting bracket 22 is slidably connected to the second transmission roller 20, and the mounting bracket 22 can slide along the axial direction of the second transmission roller 20.

[0070] With this design, during installation, the tool holder 12 can be slidably mounted on the first transmission roller 10 along the axial direction, so as to facilitate the assembly and disassembly of the tool holder 12 and the cutter 11; similarly, during installation, the support frame can be slidably mounted on the second transmission roller 20 along the axial direction, so as to facilitate the assembly and disassembly of the mounting frame 22 and the support ring 21.

[0071] Please see Figure 2 , Figure 3 In one embodiment of the present invention, one of the inner sidewall of the tool holder 12 and the outer sidewall of the first transmission roller 10 is provided with a first transmission block 121, and the other is provided with a first transmission groove 122. The first transmission block 121 and the first transmission groove 122 extend along the axial direction of the first transmission roller 10, and the first transmission block 121 and the first transmission groove 122 are in sliding engagement.

[0072] With this design, when the blade holder 12 is slidably mounted on the first transmission roller 10 along the axial direction of the first transmission roller 10, it can be guided and positioned by the cooperation of the first transmission block 121 and the first transmission groove 122, which can prevent the blade holder 12 and the cutter 11 from rotating relative to the first transmission roller 10 and improve the cutting effect of the cutter 11 on the electrode sheet.

[0073] Optionally, a first transmission block 121 can be provided on the inner side wall of the tool holder 12, and a first transmission groove 122 can be provided on the outer side wall of the first transmission roller 10. This avoids the need to provide an outwardly protruding first transmission block 121 on the outer side wall of the first transmission roller 10, so as to facilitate the installation of other structures (such as the first spacer 16, the first positioning ring 17, and the first locking sleeve 18).

[0074] Furthermore, in order to improve the guiding and positioning effect of the tool holder 12, two first transmission blocks 121 symmetrically arranged along the central axis of the tool holder 12 can be provided on the inner side wall of the tool holder 12, and two first transmission grooves 122 symmetrically arranged along the central axis of the first transmission roller 10 can be provided on the outer side wall of the first transmission roller 10, so that the two first transmission blocks 121 slide with the two first transmission grooves 122 respectively.

[0075] Please see Figure 2 , Figure 4 In one embodiment of the present invention, one of the inner sidewall of the mounting bracket 22 and the outer sidewall of the second transmission roller 20 is provided with a second transmission block 221, and the other is provided with a second transmission groove 222. The second transmission block 221 and the second transmission groove 222 extend along the axial direction of the second transmission roller 20, and the second transmission block 221 and the second transmission groove 222 are in sliding engagement.

[0076] With this design, when the mounting frame 22 is slidably fitted onto the second transmission roller 20 along the axial direction of the second transmission roller 20, it can be guided and positioned by the cooperation of the second transmission block 221 and the second transmission groove 222. This can prevent the mounting frame 22 and the support ring 21 from rotating relative to the second transmission roller 20, thereby improving the support effect of the support ring 21 on the electrode sheet.

[0077] Optionally, a second transmission block 221 can be provided on the inner side wall of the mounting bracket 22, and a second transmission groove 222 can be provided on the outer side wall of the second transmission roller 20. This avoids the need to provide an outwardly protruding second transmission block 221 on the outer side wall of the second transmission roller 20, so as to facilitate the installation of other structures (such as the second spacer 24, the second positioning ring 25, and the second locking sleeve 26).

[0078] Furthermore, in order to improve the guiding and positioning effect of the mounting frame 22, two second transmission blocks 221 symmetrically arranged along the central axis of the mounting frame 22 can be provided on the inner side wall of the mounting frame 22, and two second transmission grooves 222 symmetrically arranged along the central axis of the second transmission roller 20 can be provided on the outer side wall of the second transmission roller 20, so that the two second transmission blocks 221 slide with the two second transmission grooves 222 respectively.

[0079] Please see Figure 2 , Figure 4 In one embodiment of the present invention, an inner ring spacer 23 is fitted onto one end of the mounting bracket 22, and the support ring 21 abuts against the inner ring spacer 23.

[0080] This design allows the support ring 21 to be fitted onto the mounting bracket 22, and the inner ring spacer 23 to limit the position of the support ring 21, thereby improving the installation reliability of the support ring 21 and thus improving the support effect of the support ring 21 on the electrode sheet.

[0081] In practical applications, the inner ring spacer 23 and the mounting bracket 22 can be either separate structures or integrated structures.

[0082] As examples, in order to improve the support effect of the support ring 21 on the electrode, the axial length of the support ring 21 can be between 11mm and 14mm, specifically 11mm, 11.5mm, 12mm, 12.5mm, 13mm, 13.5mm, 14mm, etc.

[0083] Please see Figure 3 In one embodiment of the present invention, a retaining ring 13 is provided at one end of the blade holder 12, and one end face of the cutter 11 abuts against the retaining ring 13. The blade holder 12 is also fitted with a fixing ring 14, which abuts against the end face of the cutter 11 away from the retaining ring 13.

[0084] With this design, during installation, the cutter 11 can be first mounted on the cutter holder 12 so that one end of the cutter 11 abuts against the retaining ring 13, and then the fixing ring 14 can be mounted on the cutter holder 12 so that the retaining ring 13 and the fixing ring 14 can clamp the cutter 11, making it easy to assemble and disassemble the cutter 11.

[0085] In practical applications, the retaining ring 13 and the tool holder 12 can be either separate structures or integrated structures.

[0086] In practical applications, the fixing ring 14 can be connected to the tool holder 12 by means of threaded connection, plug-in connection, snap-fit ​​connection, etc.

[0087] Please see Figure 3 In one embodiment of this utility model, the fixing ring 14 is threadedly connected to the tool holder 12.

[0088] With this design, during installation, the retaining ring 14 can be gradually tightened onto the blade holder 12, which will clamp the cutter 11 between the retaining ring 13 and the retaining ring 14; during disassembly, the retaining ring 14 can be unscrewed from the blade holder 12, which will allow the cutter 11 to be removed from the blade holder 12, thus making it easier to assemble and disassemble the cutter 11.

[0089] Please see Figure 3 In one embodiment of this utility model, an elastic ring 15 is provided between the fixing ring 14 and the cutter 11.

[0090] This design allows the elastic ring 15 to compress the cutter 11, effectively preventing the cutter 11 from loosening during electrode cutting and thus improving the stability of the cutter 11.

[0091] In practical applications, the elastic ring 15 can be a rubber ring, or it can be a silicone ring, sponge, spring, etc.

[0092] Alternatively, the elastic ring 15 can be a rubber ring, which is designed to have good elasticity and low cost.

[0093] Please see Figure 5 In another embodiment of the present invention, the outer side wall of the support ring 21 is provided with an avoidance groove 211.

[0094] This design, with the avoidance groove 211, reduces the area of ​​direct contact between the cutter 11 and the support ring 21 when the cutter 11 penetrates the electrode sheet, thereby reducing the cutting of the support ring 21 by the cutter 11 and reducing wear on the cutter 11, which can improve the service life of the cutter 11 and the support ring 21.

[0095] In practical applications, the clearance groove 211 can be a V-shaped groove, a U-shaped groove, a rectangular groove, etc.

[0096] Alternatively, to make the clearance groove 211 more compatible with the cutter 11, the clearance groove 211 can be designed as a V-groove.

[0097] Please see Figure 2 , Figure 4 In one embodiment of this utility model, the support ring 21 is a rubber or nylon component. It is understood that the support ring 21 can be made of rubber or nylon.

[0098] This design, with its rubber or nylon components, can effectively support the electrode sheet, while preventing wear on the cutter 11 during the cutting process, thus protecting the cutter 11 and extending its service life.

[0099] In one embodiment, when the outer wall of the support ring 21 is not provided with a relief groove 211, the area of ​​direct contact between the cutter 11 and the support ring 21 during the cutting process is large. Therefore, the support ring 21 can be designed as a polyurethane soft foam rubber part. This material has high wear resistance, thereby improving the service life of the support ring 21.

[0100] In another embodiment, when the outer wall of the support ring 21 is provided with a relief groove 211, the area of ​​direct contact between the cutter 11 and the support ring 21 during the cutting process is small. Therefore, the support ring 21 can be designed as a nylon part, which has good resistance to deformation and can improve the support effect of the support ring 21 on the electrode sheet.

[0101] Please see Figure 1 , Figure 2 In one embodiment of this utility model, the axial direction of the first transmission roller 10 is parallel to the axial direction of the second transmission roller 20.

[0102] This design allows the same set of drive equipment to drive the first drive roller 10 and the second drive roller 20 to rotate synchronously, which can improve the cutting accuracy of the electrode sheets.

[0103] This utility model also proposes a die-cutting device, which includes a frame, a die-cutting roller assembly 100, and a drive mechanism. The specific structure of the die-cutting roller assembly 100 is as described in the above embodiments. Since this die-cutting device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, and will not be described in detail here. The die-cutting roller assembly 100 is mounted on the frame; the drive mechanism is mounted on the frame, and the drive mechanism drives the first transmission roller 10 and the second transmission roller 20 of the die-cutting roller assembly 100 to rotate.

[0104] According to some embodiments of this application, this application provides a die-cutting roller assembly 100, please refer to... Figures 1 to 4The die-cutting roller assembly 100 includes a first drive roller 10 and a second drive roller 20. The first drive roller 10 is fitted with a blade holder 12 and a plurality of first spacers 16. The blade holder 12 is fitted with a cutter 11, which is clamped by a retaining ring 13 and a fixing ring 14. The blade holder 12 can slide along the axial direction of the first drive roller 10. The axial direction of the second drive roller 20 is parallel to the axial direction of the first drive roller 10. The second drive roller 20 is fitted with a mounting frame 22 and a plurality of second spacers 24. The mounting frame 22 is fitted with a support ring 21, which is limited by an inner ring spacer 23. The mounting frame 22 can slide along the axial direction of the second drive roller 20. The support ring 21 is arranged opposite to the cutter 11, and the space between the support ring 21 and the cutter 11 is configured to allow the electrode sheet to pass through. The support ring 21 is configured to support the electrode sheet.

[0105] In the technical solution of this application embodiment, the present invention eliminates the need for a cutter 11 on the second transmission roller 20 by providing a support ring 21 on the second transmission roller 20, with the support ring 21 positioned opposite to the cutter 11 on the first transmission roller 10. When slitting the electrode sheet, the electrode sheet passes through the gap between the support ring 21 and the cutter 11. The support ring 21 supports the electrode sheet while the cutter 11 slits it. Therefore, the electrode sheet is not suspended during slitting, thus solving the problem of burrs and powder shedding from the slit electrode sheet, thereby reducing the impact on product quality.

[0106] Furthermore, during installation, the cutter 11 can be first fitted onto the cutter holder 12 so that one end face of the cutter 11 abuts against the retaining ring 13. Then, the fixing ring 14 can be fitted onto the cutter holder 12 to clamp the cutter 11 using the retaining ring 13 and the fixing ring 14. The cutter holder 12 can then be slidably fitted onto the first transmission roller 10. This improves the installation reliability of the cutter 11 and facilitates its assembly and disassembly. Additionally, the position of the cutter 11 can be adjusted by increasing or decreasing the number of first spacers 16 on both sides of the cutter 11. Similarly, during installation, the support ring 21 can be fitted onto the mounting frame 22 and limited by the inner ring spacer 23. Then, the support ring 21 can be slidably fitted onto the mounting frame 22. This improves the installation reliability of the support ring 21 and facilitates its assembly and disassembly. Additionally, the position of the support ring 21 can be adjusted by increasing or decreasing the number of second spacers 24 on both sides of the support ring 21.

[0107] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A die cutting roller assembly characterized by, The first transmission roller is sleeved with a cutter. The second transmission roller is sleeved with a support ring, the support ring is arranged opposite to the cutter, and the cutter and the support ring are configured to pass through the pole piece. The first transmission roller is further sleeved with a plurality of first partition sleeves, and the plurality of first partition sleeves are distributed on both sides of the cutter.

2. The die cutting roller assembly of claim 1, wherein, The second transmission roller is further sleeved with a plurality of second partition sleeves, and the plurality of second partition sleeves are distributed on both sides of the support ring. Among two second partition sleeves adjacent to the support ring, the outer diameter of the second partition sleeve gradually decreases from the direction close to the support ring to the direction away from the support ring.

3. The die cutting roller assembly of claim 2, wherein, The first transmission roller is provided with a first positioning ring and a first locking sleeve at both ends respectively, and the first partition sleeve and the cutter are limited between the first positioning ring and the first locking sleeve.

4. The die cutting roller assembly of claim 2, wherein, And / or, the second transmission roller is provided with a second positioning ring and a second locking sleeve at both ends respectively, and the second partition sleeve and the support ring are limited between the second positioning ring and the second locking sleeve. The first transmission roller is further sleeved with a cutter holder, and the cutter is sleeved in the cutter holder.

5. The die cutting roller assembly of any one of claims 1 to 4, wherein, The second transmission roller is further sleeved with a mounting frame, and the support ring is sleeved in the mounting frame. The cutter holder is slidingly connected to the first transmission roller, and the cutter holder can slide along the axial direction of the first transmission roller.

6. The die cutting roller assembly of claim 5, wherein, The mounting frame is slidingly connected to the second transmission roller, and the mounting frame can slide along the axial direction of the second transmission roller. One of the inner side wall of the cutter holder and the outer side wall of the first transmission roller is provided with a first transmission block, and the other is provided with a first transmission groove, the first transmission block and the first transmission groove extend along the axial direction of the first transmission roller, and the first transmission block and the first transmission groove are slidingly matched.

7. The die cutting roller assembly of claim 6, wherein, And / or, one of the inner side wall of the mounting frame and the outer side wall of the second transmission roller is provided with a second transmission block, and the other is provided with a second transmission groove, the second transmission block and the second transmission groove extend along the axial direction of the second transmission roller, and the second transmission block and the second transmission groove are slidingly matched. One end of the mounting frame is sleeved with an inner ring partition sleeve, and the support ring abuts against the inner ring partition sleeve.

8. The die cutting roller assembly of claim 5, wherein, One end of the cutter holder is provided with a stop ring, one end surface of the cutter abuts against the stop ring, the cutter holder is further sleeved with a fixing ring, and the fixing ring abuts against the end surface of the cutter away from the stop ring.

9. The die cutting roller assembly of claim 5, wherein, The fixing ring is threadedly connected to the cutter holder.

10. The die cutting roller assembly of claim 9, wherein, An elastic ring is arranged between the fixing ring and the cutter.

11. The die cutting roller assembly of claim 10, wherein, The outer side wall of the support ring is provided with a avoiding groove.

12. The die roll assembly of any one of claims 1 to 4, wherein, And / or, the support ring is a rubber part or a nylon part. And / or, the axial direction of the first transmission roller is parallel to the axial direction of the second transmission roller. The machine frame; 13. A die cutting apparatus characterized by, The die cutting roller assembly of any one of claims 1 to 12 is arranged in the machine frame; The driving mechanism is arranged in the machine frame, and drives the first transmission roller and the second transmission roller of the die cutting roller assembly to rotate. ​ ​

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