Pole piece slitting and rolling device

Abstract

The utility model relates to the technical field of pole piece slitting and roll pressing, in particular to a pole piece slitting and roll pressing device, which comprises: a slitting assembly; a winding mechanism located on the downstream side of the slitting assembly, configured to wind the pole piece; a press roll mechanism located on the downstream side of the slitting assembly and on the upstream side of the winding mechanism, comprising a first roll body and a second roll body, which are arranged at intervals to form a roll pressing gap, and at least one of the first roll body and the second roll body is provided with a plurality of embossing structures; the set height of the slitting assembly is higher than that of the roll pressing gap. According to the present application, the longitudinal stress of the pole piece cut edge is uniformly released in the roll pressing stage through the sequence of slitting first and then roll pressing, the lotus leaf edge and sawtooth edge phenomenon is avoided, the surface of the pole piece tends to be consistent after roll pressing, the pole piece slitting position is higher than the roll pressing gap, the pole piece forms a covering angle and precontacts with the embossing structure, the embossing effect is improved, the transverse friction is increased, and the pole piece deviation is avoided.

Description

Technical Field

[0001] This utility model relates to the field of electrode slitting and rolling technology, specifically to an electrode slitting and rolling device. Background Technology

[0002] In the manufacturing process of lithium battery electrodes, slitting and rolling are two core steps. Their processing sequence and equipment structure directly determine the physical properties, appearance quality, and stability of subsequent winding processes. Traditional production lines generally adopt a process of rolling first and then slitting, that is, first rolling protrusions or stripes into the electrode surface, and then cutting the electrode into multiple narrow strips along the longitudinal direction. As the electrode thickness decreases, the coating basis weight increases, and the linear speed increases, this process exhibits the following defects; During the slitting process of the electrode sheet, the coating and foil on both sides of the cutting edge undergo shear plastic deformation, forming residual stress. Since the slitting is located after the rolling process in the traditional process, the difference in rigidity between the embossed area and the non-embossed area leads to uneven stress release. The residual stress causes the cut edge to have periodic wavy or serrated edges, which affects the downstream winding effect. Moreover, when the rolling is performed before slitting, the dense area around the embossed protrusion affects the slitting process. The slitting blade must cut the coating and substrate with different densities after embossing at the same time, which reduces the blade life, increases the frequency of blade replacement on the production line, and results in poor electrode sheet slitting effect. In traditional processes, when the electrode sheet enters the pressure roller mechanism for embossing, the pressure roller mechanism and the slitting mechanism are set up in parallel upstream and downstream. The small contact area of ​​the electrode sheet on the pressure roller mechanism results in insufficient embossing effect, which generally requires a greater linear pressure. In addition, the electrode sheet is prone to lateral movement during its forward movement, resulting in inaccurate embossing position and affecting the processing quality of the electrode sheet. This error accumulates from the pressure roller mechanism until the electrode sheet reaches the slitting mechanism, affecting the effect of subsequent slitting and winding processes. During the electrode slitting process, the high-speed friction between the slitting blade and the electrode will generate particles and debris. If the negative pressure device installed at the top of the production line is used to collect them directly, the particles and debris will easily fall onto the slitting electrode. In summary, the traditional electrode processing route of first rolling and then slitting can no longer meet the comprehensive requirements of electrode edge quality and flatness, electrode embossing effect, and winding tension stability under the new process requirements of thinner electrodes, higher basis weight, and faster speed. There is an urgent need to design a new type of slitting and rolling device that can improve the electrode slitting effect, prevent electrode deviation, improve the embossing effect, and integrate online dust removal to solve the problems existing in the current technology. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. Therefore, one objective of this invention is to provide a novel electrode slitting and pressing device that avoids electrode misalignment, optimizes embossing efficiency, and integrates online dust removal, thereby enhancing electrode quality and performance.

[0004] An electrode slitting and rolling device according to an embodiment of the present invention includes: The slitting assembly is configured to cut the electrode sheet along its length direction. A winding mechanism, located downstream of the slitting assembly, is configured to apply a force toward the electrode sheet to cause the winding mechanism to wind up the electrode sheet. The pressure roller mechanism is located downstream of the slitting assembly and upstream of the winding assembly. The pressure roller mechanism includes a first roller body and a second roller body. The first roller body and the second roller body are spaced apart along the height direction of the electrode slitting and pressing device to form a pressing gap for the electrode to pass through. At least one of the first roller body and the second roller body is provided with multiple sets of embossing structures. In particular, along the height direction of the electrode slitting and rolling device, the slitting assembly is set at a height higher than the rolling gap.

[0005] According to an embodiment of the present invention, an electrode cutting and rolling device is used to uniformly release the longitudinal stress at the edge of the electrode cut during the rolling stage by first cutting and then rolling, thereby avoiding the occurrence of lobed edges and sawtooth edges. After rolling, the surface of the electrode tends to be uniform. The electrode cutting position is higher than the rolling gap, and the electrode forms a wrapping angle and pre-contacts the embossing structure, thereby improving the embossing effect, increasing the lateral friction, and preventing the electrode from deviating.

[0006] In some examples of this utility model, the slitting assembly includes a slitting motor, a slitting roller, and a cutting blade. The cutting blade is fixed to the outer peripheral wall of the slitting roller, and the slitting motor is connected to the slitting roller in a transmission connection. The slitting motor is used to drive the slitting roller to drive the cutting blade to rotate synchronously, so that the slitting assembly cuts the electrode sheet.

[0007] In some examples of this utility model, the cutting blade includes a fixing part and a cutting part. The fixing part is hollow and sleeved on the slitting roller. The cutting part is located on the side of the fixing part away from the slitting roller and is fixed to the fixing part. The cutting part is arranged around the fixing part circumferentially. The cutting part and the fixing part have at least one pair of mating limiting surfaces to limit the relative position of the cutting part and the fixing part in the axial direction of the slitting roller; and / or There is at least one cutting blade. When multiple cutting blades are provided, they are spaced apart by a preset distance along the axial direction of the slitting roller.

[0008] In some examples of this utility model, the cutting blade further includes a limiting structure, which is fitted with both the cutting part and the fixing part to limit the relative position of the cutting part and the fixing part in the radial direction of the slitting roller; and / or The fixing part and the cutting part can be integrated or separate.

[0009] In some examples of this utility model, the slitting and pressing device further includes: a base and a slitting frame, the slitting assembly, the winding mechanism and the pressing roller mechanism are all located above the base, the upper surface of the base has a protrusion, the slitting assembly is disposed on the slitting frame, and the slitting frame is fixed to the protrusion.

[0010] In some examples of this utility model, the slitting and rolling device further includes a dust collection mechanism. Along the height direction of the electrode slitting and rolling device, the dust collection mechanism is located between the slitting component and the protrusion. The dust collection mechanism includes a dust collection box, which is fixed to the protrusion and spaced apart from the slitting component. The top wall of the dust collection box defines a dust collection groove that opens toward the slitting component, and the top wall of the box forms a dust collection port that penetrates the top wall of the box.

[0011] In some examples of this utility model, the top wall of the box includes: a first wall portion, a second wall portion, and a third wall portion. The first wall portion, the second wall portion, and the third wall portion are arranged sequentially along the length direction of the electrode sheet. The second wall portion is connected between the first wall portion and the third wall portion. The first wall portion, the second wall portion, and the third wall portion together define a dust collection groove. From the direction of the dust collection mechanism to the cutting assembly, the first wall portion and the third wall portion are inclined in a direction away from each other. At least one of the first wall portion, the second wall portion, and the third wall portion has a dust collection port.

[0012] In some examples of this utility model, the pressure roller mechanism further includes two electric telescopic rods, two symmetrically arranged support members, and a pressure roller motor that is drivenly connected to the first roller body. The two support members are respectively connected to the pressure roller motor and the first roller body, and the output end of the electric telescopic rod is drivenly connected to the corresponding support member; and / or The slitting roll pressing device also includes a guide roller, a passing roller, and a lifting roller. The guide roller and the passing roller are both located upstream of the slitting assembly, and the guide roller is located upstream of the passing roller. The guide roller and the passing roller are configured to adjust the tension of the electrode sheet to be cut. The lifting roller is located downstream of the pressing roller mechanism and upstream of the winding mechanism. Along the height direction of the electrode sheet slitting roll pressing device, the lifting roller is set at a height higher than the setting height of the roll pressing gap.

[0013] In some examples of this utility model, the dust collection mechanism further includes an air extractor and a dust collection frame disposed in the dust collection box. The dust collection frame has an air extraction channel, the air extractor is connected to the air extraction channel, the dust collection frame is hollow, and the top wall and side wall of the dust collection frame each have at least one dust collection hole.

[0014] In some examples of this utility model, the dust collection mechanism further includes a filter frame, which is slidably installed inside the dust collection frame. The filter frame includes a filter plate and a filter plate bracket connected thereto. The filter plate is attached to the inner wall of the dust collection frame and can cover one end of the air extraction channel. At least one through groove is opened on the side wall of the bracket of the filter plate bracket, and the through groove corresponds to the dust collection hole.

[0015] The beneficial effects of this utility model are as follows: 1. This application uses a sequence of first slitting and then rolling to ensure that the longitudinal stress at the edge of the electrode cut is evenly released during the rolling stage, avoiding the occurrence of lobed or serrated edges. After rolling, the surface of the electrode tends to be uniform. The electrode slitting position is higher than the rolling gap, and the electrode forms a wrapping angle and pre-contacts the embossing structure, improving the embossing effect, increasing the lateral friction, and preventing the electrode from deviating.

[0016] 2. This application sets up a dust collection box, which collects particles and debris into a hollow dust collection frame through a dust collection port. The particles and debris can be discharged from the device through a filter frame. Under the combined action of the vacuum pump and gravity, the particles and debris first fall onto the inclined part of the dust collection box to eliminate kinetic energy, and then slide into the dust collection box to complete the collection, thus avoiding secondary pollution of the electrode surface.

[0017] 3. In this application, the slitting motor, slitting roller and cutting blade are coaxially arranged and connected in sequence. The rotation driven by the slitting motor is transmitted to the cutting blade in sequence. In each stage of transmission, the radial transmission error is reduced, thereby reducing the total error accumulation and making the cutting process more stable.

[0018] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0019] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 Schematic diagram of the electrode slitting and rolling device provided in the embodiments of this application Figure 1 ; Figure 2 Schematic diagram of the electrode slitting and rolling device provided in the embodiments of this application Figure 2 ; Figure 3 This is a schematic diagram of the structure of the slitting component provided in an embodiment of this application; Figure 4 This is a schematic diagram of the structure of the cutting blade provided in the embodiments of this application; Figure 5 This is a schematic diagram of the dust collection mechanism provided in the embodiments of this application; Figure 6 This is a schematic diagram illustrating the cooperation between the dust collection frame and the filter frame provided in an embodiment of this application. Figure 7 This is a schematic diagram of the pressure roller mechanism provided in an embodiment of this application.

[0020] Figure label: 1-Slitting assembly, 101-Slitting motor, 102-Slitting roller, 103-Cut blade, 1031-Slitting part, 1032-Fixing part, 104-Slitting frame; 2-Rewinding mechanism, 201-Rewinder, 202-Rewinding motor; 3-Pressure roller mechanism, 301-First roller body, 302-Second roller body, 303-Embossing structure, 304-Electric telescopic rod, 305-Bearing component, 306-Pressure roller motor, 307-Roll gap; 4-Matrix, 401-Protrusion; 5-Dust collection mechanism, 501-Dust collection box, 5011-Top wall of box, 5012-First wall, 5013-Second wall, 5014-Third wall, 5015-Dust collection port, 502-First dust collection port, 503-Second dust collection port, 504-Exhaust fan, 505-Dust collection frame, 506-Dust collection hole, 507-Filter plate, 508-Filter plate support, 509-Dust collection trough, 510-Through groove; 6-Guide rollers; 7-Roller; 8-Lifting roller. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model. In addition, it should be understood that the specific embodiments described herein are only for illustration and explanation of the present utility model and are not intended to limit the present utility model. In the present utility model, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0022] Please see Figures 1-7 This application provides an electrode slitting roller 102 pressing device, comprising: Cutting assembly 1 is configured to cut the electrode sheet along the length direction of the electrode sheet; The winding mechanism 2 is located downstream of the slitting assembly 1. The winding mechanism 2 is configured to apply a force toward the electrode sheet to the winding mechanism 2 so that the winding mechanism 2 winds up the electrode sheet. The pressure roller mechanism 3 is located downstream of the slitting assembly 1 and upstream of the winding mechanism 2. The pressure roller mechanism 3 includes a first roller body 301 and a second roller body 302. The first roller body 301 and the second roller body 302 are spaced apart along the height direction of the electrode slitting roller 102 pressing device to form a roller pressing gap 307 for the electrode to pass through. At least one of the first roller body 301 and the second roller body 302 is provided with multiple sets of embossing structures 303. In particular, along the height direction of the electrode slitting roller 102 pressing device, the setting height of the slitting component 1 is higher than the setting height of the roller pressing gap 307.

[0023] It should be noted that the winding mechanism 2 is configured to apply a force toward the electrode sheet, causing the electrode sheet to move toward the winding mechanism 2, thereby winding the electrode sheet. Along the electrode sheet's travel direction, the pressure roller mechanism 3 is disposed between the slitting assembly 1 and the winding mechanism 2. Along the height direction of the electrode sheet slitting roller 102 pressing device, the first roller body 301 is located above the second roller body 302. The first roller body 301 is provided with multiple sets of embossing structures 303, or the second roller body 302 is provided with multiple sets of embossing structures 303, or both the first roller body 301 and the second roller body 302 are provided with multiple sets of embossing structures 303. Each set of embossing structures 303 may include multiple embossing protrusions, and the electrode sheet is pressed by the embossing structures 303 to form embossing on the electrode sheet.

[0024] In this embodiment, the electrode sheet is sequentially processed by slitting, embossing, and winding. The slitting component 1 is positioned above the gap between the pressure rollers. Unlike the traditional method of embossing first and then cutting, the electrode sheet enters the rolling process after slitting and is then wound up. The longitudinal stress generated by cutting in the electrode sheet, that is, the stress distributed in the vertical direction along the edge of the electrode sheet cut, is dispersed during the rolling process, and the stress at the cut edge is released, thereby improving the flatness of the electrode sheet cut edge. At the same time, the winding tension fluctuation amplitude is reduced during the winding process after the rolling process, and the winding process is more stable, which facilitates tension control during the winding process.

[0025] It should be emphasized that the vertical position of the slitting component 1 is higher than the roller gap 307 formed between the first roller 301 and the second roller 302. Therefore, after the electrode is slitted, before reaching the roller gap 307, the forward direction of the electrode forms a wrapping angle with the horizontal plane. Consequently, the electrode tends to wrap towards the first roller 301 side in the pressure roller mechanism 3, so that the electrode inlet side first contacts the embossing structure 303 on the surface of the first roller 301 in advance. The arc-shaped top surface of the embossing structure 303... First, the electrode sheet is pre-formed and pressed in the coating corner area. Then, the electrode sheet enters the roller pressing gap 307 to complete the final embossing. The pre-pressing process completes part of the plastic deformation of the electrode sheet in advance. Without increasing the embossing line pressure, the embossing effect is improved and the peak load in the main embossing process of the pressing roller mechanism 3 is reduced. At the same time, during the pressing process, the first roller body 301 pre-contacts the electrode sheet, which makes the electrode sheet feeding effect better. Expanding the contact area helps to suppress the lateral movement of the electrode sheet before entering the roller pressing gap 307 and avoid the electrode sheet from deviating.

[0026] For example, in some specific embodiments, a slitting assembly 1, a guide plate, a pressure roller mechanism 3, and a winding mechanism 2 can be sequentially arranged along the electrode traveling direction (i.e., along the electrode conveying direction); the cutting body of the slitting assembly 1 is located obliquely above the first roller body 301, and the cutting body and the roller pressing gap 307 are offset by a distance in the vertical direction; the guide plate is led out along the slitting assembly 1 to the pressure roller mechanism 3 for receiving the cut electrode; the guide plate is configured as a cantilever, with one end of its cantilever extending toward the roller pressing gap 307.

[0027] In the specific implementation process, after the electrode sheet is cut by the cutting body, it immediately attaches to the downward inclined surface of the guide plate and moves. This helps the electrode sheet to form a running trajectory that first descends and then faces the first roller 301. This drives the electrode sheet to first contact the embossed protrusions on the surface of the first roller 301 in a wrapping manner, reducing the impact of the electrode sheet collapsing due to its own weight on the wrapping angle. The cantilevered guide plate can also be equipped with lateral stiffeners to further improve the support effect.

[0028] In some embodiments of this utility model, such as Figure 1 , Figure 3 and Figure 4 As shown, the slitting assembly 1 includes a slitting motor 101, a slitting roller 102, and a cutting blade 103 (the cutting body in the above embodiment). The cutting blade 103 is fixed to the outer peripheral wall of the slitting roller 102. The slitting motor 101 is connected to the slitting roller 102 for transmission. The slitting motor 101 is used to drive the slitting roller 102 to drive the cutting blade 103 to rotate synchronously, so that the slitting assembly 1 cuts the electrode sheet.

[0029] Specifically, the slitting assembly 1 includes a slitting motor 101, a slitting roller 102, and a cutting blade 103 connected in sequence. In this embodiment, the slitting motor 101, the slitting roller 102, and the cutting blade 103 are coaxially arranged. The cutting blade 103 is sleeved on the outer surface of the slitting roller 102. In the specific implementation process, the rotation driven by the slitting motor 101 is sequentially transmitted to the cutting blade 103. In each stage of transmission, the radial transmission error is reduced, thereby reducing the total error accumulation. During the cutting of the electrode sheet, the electrode sheet reaction force experienced by the cutting blade 103 has a smaller impact on the cutting blade 103, and the cutting process is more stable.

[0030] In some embodiments of this utility model, the cutting blade 103 includes a fixing part 1032 and a cutting part 1031. The fixing part 1032 is hollow and sleeved on the slitting roller 102. The cutting part 1031 is located on the side of the fixing part 1032 away from the slitting roller 102 and is fixed to the fixing part 1032. The cutting part 1031 is arranged around the fixing part 1032 circumferentially. The cutting part 1031 and the fixing part 1032 have at least one pair of mating limiting surfaces to limit the relative position of the cutting part 1031 and the fixing part 1032 in the axial direction of the slitting roller 102. And / or at least one cutting blade 103 is provided. When multiple cutting blades 103 are provided, the multiple cutting blades 103 are sequentially spaced at a predetermined distance along the axial direction of the slitting roller 102.

[0031] For example, in some specific embodiments, the cutting part 1031 and the fixing part 1032 are separately arranged. A pair of flattened limiting surfaces are provided between the separately arranged cutting part 1031 and the fixing part 1032. The pair of flattened limiting surfaces may include a first limiting surface and a second limiting surface. The cutting part 1031 has a first limiting surface and the fixing part 1032 has a second limiting surface. The first limiting surface and the second limiting surface are opposite to and attached to each other along the axial direction of the slitting roller 102. The first limiting surface and the second limiting surface are perpendicular to the cutter shaft. After the first limiting surface and the second limiting surface are attached, the cutting part 1031 and the fixing part 1032 can be limited in the axial direction of the slitting roller 102, reducing the risk of the cutting part 1031 moving relative to the fixing part 1032 in the axial direction of the slitting roller 102. A mounting groove for mating connection and a corresponding protruding structure are provided between the fixing part 1032 and the cutting part 1031. As an example, the fixing part 1032 is provided with one of the mounting groove and the protruding structure, and the cutting part 1031 is provided with the other of the mounting groove and the protruding structure. The protruding structure is assembled in the mounting groove. During assembly, the fixing part 1032 is first locked onto the slitting roller 102, and the outward protruding structure of the cutting part 1031 is pushed into the mounting groove radially and fits against the end face of the fixing part 1032. Then, it is locked with the end face bolts, which completes the dual positioning of the cutting part 1031 in both the radial and axial directions. When the cutting blade of the cutting part 1031 wears out after long-term operation, the cutting part 1031 can be removed and replaced separately simply by loosening the end face bolts. The fixing part 1032 and the entire slitting roller 102 do not need to be disassembled again, nor does it need to be readjusted between the fixing part 1032 and the slitting roller 102. The replacement process of the cutting part 1031 has been changed from the traditional integral structure of disassembling and reassembling the shaft to the bolt removal and installation of the cutting part 1031, which improves the replacement efficiency of the cutting blade 103.

[0032] One or more cutting blades 103 are provided. When multiple cutting blades 103 are provided, adjacent cutting blades 103 are spaced apart by a preset distance along the axial direction of the slitting roller 102.

[0033] Specifically, when a cutting blade 103 is set, within the total width of the electrode sheet left in the coating process, a cutting blade 103 can be arranged at the center of the electrode sheet. The electrode sheet is symmetrically cut into two electrode sheet parts of equal width in one pass. When multiple narrow electrode sheets are required, multiple cutting blades 103 are arranged at equal preset intervals along the axial direction of the slitting roller 102. The two outermost cutting blades 103 can also be set to cut into the inner side of the electrode sheet at a certain distance.

[0034] In the specific implementation process, after the electrode sheet enters the slitting assembly 1, multiple electrode sheets of equal width are formed between adjacent cutting blades 103, and the two outermost corners of the electrode sheet are cut off simultaneously, completing the edge removal and slitting operations at the same time. The slitting electrode sheets then enter the subsequent embossing and winding processes for further processing.

[0035] In some embodiments of this utility model, the cutting blade 103 further includes a limiting structure, which is fitted together with both the cutting part 1031 and the fixing part 1032 to limit the relative position of the cutting part 1031 and the fixing part 1032 in the radial direction of the slitting roller 102; and / or the fixing part 1032 and the cutting part 1031 are integrally or separately provided.

[0036] The cutting blade 103 may further include a limiting structure, which may be an end-face bolt as described in the above embodiment. The end-face bolt can be inserted into the cutting part 1031 and the fixing part 1032 along the axial direction of the slitting roller 102, so that the cutting part 1031 and the fixing part 1032 will not move relative to each other in the radial direction of the slitting roller 102. Thus, the limiting structure restricts the relative position of the cutting part 1031 and the fixing part 1032 in the radial direction of the slitting roller 102. For example, the fixing part 1032 is formed with a first mounting hole extending along the axial direction of the slitting roller 102, and the cutting part 1031 is formed with a second mounting hole extending along the axial direction of the slitting roller 102. The first mounting hole and the second mounting hole are arranged opposite each other along the axial direction of the slitting roller 102. The limiting structure passes through the first mounting hole and is then mounted in the second mounting hole, thereby restricting the relative position of the cutting part 1031 and the fixing part 1032 in the radial direction of the slitting roller 102.

[0037] For example, in some other specific embodiments, the cutting part 1031 and the fixing part 1032 are integrally provided. The integrally provided cutting part 1031 and fixing part 1032 do not require additional connecting parts or mating gaps to limit their relative positions. There is no end face contact gap between them. When the cutting blade 103 rotates at high speed, there will be no axial deviation caused by the relative sliding of the cutting part 1031 and fixing part 1032. The integrally provided cutting part 1031 and fixing part 1032 are more structurally balanced, suppressing the offset of the cutting blade 103 caused by vibration.

[0038] In some other specific embodiments, the fixing part 1032 and the cutting part 1031 are separately provided, and the fixing part 1032 and the cutting part 1031 are detachably connected. The fixing part 1032 and the cutting part 1031 can be replaced separately, thereby reducing the maintenance cost of the electrode slitting roller 102 pressing device.

[0039] In some embodiments of this utility model, such as Figure 1 As shown, the slitting roller 102 pressing device also includes: a base 4 and a slitting frame 104. The slitting assembly 1, the winding mechanism 2 and the pressing roller mechanism 3 are all located above the base 4. A protrusion 401 is formed on the upper surface of the base 4. The slitting assembly 1 is disposed on the slitting frame 104 and the slitting frame 104 is fixed to the protrusion 401.

[0040] The slitting roller 102 pressing device may further include a base 4 and a slitting frame 104. Along the height direction of the slitting roller 102 pressing device, the slitting assembly 1, the winding mechanism 2, and the pressure roller mechanism 3 are all disposed above the base 4, and are all mounted on the base 4. Along the height direction of the slitting roller 102 pressing device, a protrusion 401 is formed on the upper surface of the base 4. The slitting assembly 1 is disposed on the slitting frame 104, and the slitting frame 104 is fixedly connected to the protrusion 401 of the base 4, so that the slitting assembly 1 is mounted on the base 4 through the slitting frame 104 and the protrusion 401. The protrusion 401 and the base 4 can be integrally formed, and their reference surfaces are aligned at once. The slitting frame 104 is set on the protrusion 401, which makes it easier to ensure the parallelism of the slitting roller 102 and reduce the error during the slitting process. At the same time, the setting of the protrusion 401 reduces the relative height between the slitting component 1 and the base 4. In order to make the slitting component 1 correspondingly located above the roller gap 307, the total height of the slitting frame 104 lifting the slitting component 1 is reduced, which improves the stability during the cutting process. Meanwhile, an open space is formed below the slitting component 1 supported by the slitting frame 104, which facilitates the setting of other mechanical components and improves the space utilization rate.

[0041] In some embodiments of this utility model, such as Figure 1 As shown, the slitting roller 102 pressing device further includes a dust collection mechanism 5. Along the height direction of the electrode slitting roller 102 pressing device, the dust collection mechanism 5 is located between the slitting assembly 1 and the protrusion 401. The dust collection mechanism 5 includes a dust collection box 501, which is fixed to the protrusion 401 and spaced apart from the slitting assembly 1. The top wall 5011 of the dust collection box 501 defines a dust collection groove 509 that opens toward the slitting assembly 1, and the top wall 5011 forms a dust collection port 5015 that penetrates the top wall 5011.

[0042] The slitting roller 102 pressing device may further include a dust collection mechanism 5, which is located between the slitting assembly 1 and the protrusion 401. The dust collection mechanism 5 may include a dust collection box 501, which is detachably connected to the protrusion 401 by bolts. The dust collection box 501 has a top wall 5011 that is opposite to the slitting assembly 1 along the height direction of the electrode slitting roller 102 pressing device. The top wall 5011 defines a dust collection groove 509 that opens toward the slitting assembly 1. The dust collection groove 509 is recessed away from the slitting assembly 1. After the splashing particles and debris generated during electrode slitting fall, they fall into the dust collection groove 509, thereby allowing the splashing particles and debris generated during electrode slitting to be sucked away from the dust collection port 5015.

[0043] In some embodiments of this utility model, such as Figure 1 and Figure 5As shown, the top wall 5011 of the box includes: a first wall portion 5012, a second wall portion 5013, and a third wall portion 5014. The first wall portion 5012, the second wall portion 5013, and the third wall portion 5014 are arranged sequentially along the length direction of the electrode sheet. The second wall portion 5013 is connected between the first wall portion 5012 and the third wall portion 5014. The first wall portion 5012, the second wall portion 5013, and the third wall portion 5014 together define a dust collection groove 509. From the dust collection mechanism 5 to the cutting assembly 1, the first wall portion 5012 and the third wall portion 5014 are inclined in a direction away from each other. At least one of the first wall portion 5012, the second wall portion 5013, and the third wall portion 5014 is formed with a dust collection port 5015.

[0044] The second wall portion 5013 can be parallel to the horizontal plane, the first wall portion 5012 and the third wall portion 5014 are inclined at a certain angle towards the cutting assembly 1 in the horizontal direction, the dust collection port 5015 penetrates the top wall 5011 of the box, the dust collection port 5015 can include a first dust collection port 502 and a second dust collection port 503, the second wall portion 5013 can form at least one first dust collection port 502, and the first wall portion 5012 and the third wall portion 5014 can each form at least one second dust collection port 503.

[0045] It should be noted that the first wall portion 5012 and the third wall portion 5014 on both sides of the dust collection box 501 are inclined. The first wall portion 5012 and the third wall portion 5014 act as guide ramps. After the splashing particles and debris generated during electrode cutting fall, they first impact at least one of the first wall portion 5012 and the third wall portion 5014, thus losing kinetic energy. Then, they slide into the dust collection trough 509 along at least one of the first wall portion 5012 and the third wall portion 5014. Compared with a flat-top box, the top wall 501 of the box is inclined. The amount of dust falling on the top surface of 1 is greatly reduced. The first dust collection port 502 is located in the middle of the second wall 5013, and the second dust collection port 503 is located on the first wall 5012 and the third wall 5014. That is, the second dust collection port 503 is inclined at the same angle as the top walls on both sides of the dust collection box 501. The first dust collection port 502 and the inclined second dust collection port 503 have an angle in the horizontal direction. When the negative pressure of the air extractor 504 is fixed, it is conducive to the airflow flowing into the dust collection box 501, avoiding the accumulation of particles and debris at the box opening.

[0046] In some embodiments of this utility model, such as Figure 1 and Figure 7As shown, the pressure roller mechanism 3 also includes two electric telescopic rods 304, two symmetrically arranged support members 305, and a pressure roller motor 306 that is drivenly connected to the first roller body 301. The two support members 305 are respectively connected to the pressure roller motor 306 and the first roller body 301, and the output end of the electric telescopic rod 304 is drivenly connected to the corresponding support member 305. The slitting roller 102 pressing device also includes a guide roller 6, a guide roller 7, and a lifting roller 8. The guide roller 6 and the guide roller 7 are both located upstream of the slitting assembly 1, and the guide roller 6 is located upstream of the guide roller 7. The guide roller 6 and the guide roller 7 are configured to adjust the tension of the electrode sheet to be cut. The lifting roller 8 is located downstream of the pressure roller mechanism 3 and upstream of the winding mechanism 2. Along the height direction of the electrode sheet slitting roller 102 pressing device, the setting height of the lifting roller 8 is higher than the setting height of the roller pressing gap 307.

[0047] As an example, such as Figure 1 and Figure 7 As shown, the pressure roller mechanism 3 also includes two electric telescopic rods 304, two symmetrically arranged bearing members 305, and a pressure roller motor 306 that is connected to the first roller body 301. The two bearing members 305 are respectively connected to the pressure roller motor 306 and the first roller body 301, and the output end of the electric telescopic rod 304 is connected to the corresponding bearing member 305.

[0048] As another example, the slitting roller 102 pressing device also includes a guide roller 6, a passing roller 7, and a lifting roller 8. The guide roller 6 and the passing roller 7 are both located upstream of the slitting assembly 1, and the guide roller 6 is located upstream of the passing roller 7. The guide roller 6 and the passing roller 7 are configured to adjust the tension of the electrode sheet to be cut. The lifting roller 8 is located downstream of the pressing roller mechanism 3 and upstream of the winding mechanism 2. Along the height direction of the electrode sheet slitting roller 102 pressing device, the setting height of the lifting roller 8 is higher than the setting height of the roller pressing gap 307.

[0049] As another example, the pressure roller mechanism 3 also includes two electric telescopic rods 304, two symmetrically arranged support members 305, and a pressure roller motor 306 that is drivenly connected to the first roller body 301. The two support members 305 are respectively connected to the pressure roller motor 306 and the first roller body 301. The output end of the electric telescopic rod 304 is drivenly connected to the corresponding support member 305. The slitting roller 102 pressing device also includes a guide roller 6, a passing roller 7, and a lifting roller 8. The guide roller 6 and the passing roller 7 are both located on the upstream side of the slitting assembly 1, and the guide roller 6 is located on the upstream side of the passing roller 7. The guide roller 6 and the passing roller 7 are configured to adjust the tension of the electrode sheet to be cut. The lifting roller 8 is located on the downstream side of the pressure roller mechanism 3 and on the upstream side of the winding mechanism 2. Along the height direction of the electrode sheet slitting roller 102 pressing device, the setting height of the lifting roller 8 is higher than the setting height of the roller pressing gap 307.

[0050] Specifically, the lifting and lowering of the first roller 301 of the pressure roller mechanism 3 is achieved by setting an electric telescopic rod 304 to drive the bearing member 305, which can change the roller gap 307 and thus adjust the linear pressure online. This facilitates the adjustment operation of the user when rolling different specifications of electrode sheets. The two bearing members 305 are symmetrically arranged on the left and right sides in the extension direction of the roller shaft of the first roller 301. The thrust of the electric telescopic rod 304 is directly applied to the first roller 301 through the bearing member 305 to realize the lifting and lowering operation of the first roller 301. For the electric telescopic rod 304, the roller shaft of the first roller 301 on the side without the motor is longer, which can balance the bending moment on both sides of the first roller 301. Thus, the additional pressure roller motor 306 is only equivalent to changing the corresponding position of the bearing on the first roller 301, reducing the balance effect brought by the pressure roller motor 306.

[0051] In some embodiments, the slitting roller 102 pressing device further includes a guide roller 6, a passing roller 7, and a lifting roller 8. The guide roller 6 and the passing roller 7 are disposed on the base 4 and configured to adjust the tension of the electrode sheet to be cut. The lifting roller 8 is disposed between the pressing roller mechanism 3 and the winding mechanism 2, and the lifting roller 8 is located above the roller pressing gap 307 in the vertical direction.

[0052] In the specific implementation of this embodiment, the operator leads out the electrode sheet from the self-unwinding reel, first around the guide roller 6 at the front end of the substrate 4, then around the overroller 7 towards the top of the overroller 7. After slitting and rolling, it finally crosses over the lifting roller 8 and enters the winding mechanism 2 for winding. Because the electrode sheet sequentially wraps around the guide roller 6 and the overroller 7 and moves towards the winding mechanism 2, the electrode sheet tension during the winding process of the winding mechanism 2 is easier to control. Furthermore, the lifting roller 8 is installed between the pressure roller mechanism 3 and the winding mechanism 2, and the electrode sheet descends into the winding mechanism 2. After entering the pressure roller mechanism 3, the electrode is lifted upward by the lifting roller 8 and further wrapped towards the first roller body 301, resulting in better rolling effect, increasing the contact arc between the electrode and the winding mechanism 2, and reducing the torque required to maintain winding tension during the winding process. When the winding mechanism 2 reaches the set length, a new core needs to be cut in. At this time, the lifting roller 8 remains in a high position, and the cut electrode head hangs down naturally under the action of gravity, making it easier for the operator to attach the electrode head to the new core and improving the success rate of electrode overlap.

[0053] In some embodiments of this utility model, such as Figure 1 , Figure 5 and Figure 6 As shown, the dust collection mechanism 5 also includes an air extractor 504 and a dust collection frame 505 disposed in the dust collection box 501. The dust collection frame 505 has an air extraction channel, the air extractor 504 is connected to the air extraction channel, the dust collection frame 505 is hollow, and the top wall and side wall of the dust collection frame 505 each have at least one dust collection hole 506.

[0054] It should be noted that dust collection holes 506 are provided on both the top and side walls of the dust frame, allowing for suction and dust collection in both the upper and side directions. This facilitates dust collection at the corresponding first dust collection port 502 and second dust collection port 503. The dust-laden airflow enters the dust collection frame 505 through the dust collection holes 506 and is immediately sucked away by the vacuum pump 504 without needing to pass through additional hoses or bends. It can be configured to form a suction channel between the top wall of the dust collection frame 505 and the vacuum pump 504, so that after the dust-laden airflow passes through the dust collection holes 506, the particles and debris in the dust-laden airflow fall into the dust collection frame 505 under the action of gravity, preventing them from entering the vacuum pump 504.

[0055] In some embodiments of this utility model, such as Figure 5 and Figure 6 As shown, the dust collection mechanism 5 also includes a filter frame, which is slidably installed inside the dust collection frame 505. The filter frame includes a filter plate 507 and a filter plate bracket 508 connected thereto. The filter plate 507 is attached to the inner wall of the dust collection frame 505 and can cover one end of the air extraction channel. At least one through groove 510 is opened on the bracket side wall of the filter plate bracket 508, and the through groove 510 corresponds to the dust collection hole 506.

[0056] In the specific implementation of this embodiment, the dust collection mechanism 5 collects particles and debris during use. After shutdown, the operator can horizontally pull the filter plate support 508 out of the inner cavity of the dust collection frame 505, clean the filter plate support 508 and the filter plate 507, and then horizontally push the filter plate support 508 into the inner cavity of the dust collection frame 505. At this time, the filter plate 507 completely covers the inlet end of the air extraction channel. The dust-laden airflow passes through the dust collection hole 506 and the through groove 510 on the filter plate support 508 in sequence and enters the filter plate support 508. Some particles and debris fall to the bottom plate of the filter plate support 508 under the action of gravity, while other particles and debris are intercepted on the outside by the filter plate 507. Clean air enters the air extraction channel and is introduced into the air extraction fan 504. The operator only needs to stop the machine periodically and pull out the filter plate support 508 for cleaning to avoid the dust-laden airflow entering the air extraction fan 504 and thus affecting the dust collection effect.

[0057] In some embodiments of this utility model, such as Figure 1 As shown, the winding mechanism 2 includes a winding device 201 and a winding motor 202. The electrode is fixed to one end of the winding device 201. The winding motor 202 is configured to drive the winding device 201 to rotate so that the electrode moves toward the winding device 201.

[0058] It should be noted that the output shaft of the winding motor 202 and the spindle of the winding unit 201 can be directly connected by a keyway and a locking sleeve, without the need for belts and gears. Changes in motor torque can be transmitted to the winding unit 201 in a timely manner, which is conducive to closed-loop tension adjustment and avoids edge curling caused by sudden changes in tension at the cutting edge.

[0059] The embodiments of this utility model have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. An electrode sheet slitting and pressing device, characterized in that, include: A slitting assembly is configured to cut the electrode sheet along its length direction. A winding mechanism, located downstream of the slitting assembly, is configured to apply a force toward the electrode sheet to cause the winding mechanism to wind up the electrode sheet. The pressure roller mechanism is located downstream of the slitting assembly and upstream of the winding mechanism. The pressure roller mechanism includes a first roller body and a second roller body. The first roller body and the second roller body are spaced apart along the height direction of the electrode slitting and pressing device to form a pressing gap for the electrode to pass through. At least one of the first roller body and the second roller body is provided with multiple sets of embossing structures. In particular, along the height direction of the electrode slitting and rolling device, the slitting component is set at a height higher than the rolling gap.

2. The electrode slitting and rolling device according to claim 1, characterized in that, The slitting assembly includes a slitting motor, a slitting roller, and a cutting blade. The cutting blade is fixed to the outer peripheral wall of the slitting roller. The slitting motor is connected to the slitting roller in a transmission connection. The slitting motor is used to drive the slitting roller to drive the cutting blade to rotate synchronously, so that the slitting assembly cuts the electrode sheet.

3. The electrode slitting and rolling device according to claim 2, characterized in that, The cutting blade includes a fixing part and a cutting part. The fixing part is hollow and sleeved on the slitting roller. The cutting part is located on the side of the fixing part away from the slitting roller and is fixed to the fixing part. The cutting part is arranged around the fixing part circumferentially. The cutting part and the fixing part have at least one pair of mating limiting surfaces to limit the relative position of the cutting part and the fixing part in the axial direction of the slitting roller; and / or The cutting blade is provided with at least one, and when multiple cutting blades are provided, the multiple cutting blades are spaced apart by a preset distance along the axial direction of the slitting roller.

4. The electrode slitting and rolling device according to claim 3, characterized in that, The cutting blade further includes a limiting structure, which is fitted to both the cutting part and the fixing part to limit the relative position of the cutting part and the fixing part in the radial direction of the slitting roller; and / or The fixing part and the cutting part are either integrally formed or separately formed.

5. The electrode slitting and rolling device according to claim 1, characterized in that, The slitting and pressing device further includes a base and a slitting frame. The slitting assembly, the winding mechanism and the pressing roller mechanism are all located above the base. A protrusion is formed on the upper surface of the base. The slitting assembly is disposed on the slitting frame and the slitting frame is fixed to the protrusion.

6. The electrode slitting and rolling device according to claim 5, characterized in that, The slitting and rolling device further includes a dust collection mechanism. Along the height direction of the electrode slitting and rolling device, the dust collection mechanism is located between the slitting component and the protrusion. The dust collection mechanism includes a dust collection box, which is fixed to the protrusion and spaced apart from the slitting component. The top wall of the dust collection box defines a dust collection groove that opens toward the slitting component, and the top wall of the box forms a dust collection port that penetrates the top wall of the box.

7. The electrode slitting and rolling device according to claim 6, characterized in that, The top wall of the box includes a first wall portion, a second wall portion, and a third wall portion. The first wall portion, the second wall portion, and the third wall portion are arranged sequentially along the length direction of the electrode sheet. The second wall portion is connected between the first wall portion and the third wall portion. The first wall portion, the second wall portion, and the third wall portion together define the dust collection groove. From the dust collection mechanism to the cutting assembly, the first wall portion and the third wall portion are inclined in a direction away from each other. At least one of the first wall portion, the second wall portion, and the third wall portion forms the dust collection port.

8. The electrode slitting and rolling device according to claim 1, characterized in that, The pressure roller mechanism further includes two electrically operated telescopic rods, two symmetrically arranged support members, and a pressure roller motor that is drivenly connected to the first roller body. The two support members are respectively connected to the pressure roller motor and the first roller body. The output end of each electrically operated telescopic rod is drivenly connected to the corresponding support member; and / or The slitting and pressing device further includes a guide roller, a guide roller, and a lifting roller. The guide roller and the guide roller are both located upstream of the slitting assembly, and the guide roller is located upstream of the guide roller. The guide roller and the guide roller are configured to adjust the tension of the electrode sheet to be cut. The lifting roller is located downstream of the pressing roller mechanism and upstream of the winding mechanism. Along the height direction of the electrode sheet slitting and pressing device, the lifting roller is set at a height higher than the setting height of the pressing gap.

9. The electrode slitting and rolling device according to claim 6, characterized in that, The dust collection mechanism further includes an air extractor and a dust collection frame disposed in the dust collection box. The dust collection frame has an air extraction channel, the air extractor is connected to the air extraction channel, the dust collection frame is hollow, and the top wall and side wall of the dust collection frame each have at least one dust collection hole.

10. The electrode slitting and rolling device according to claim 9, characterized in that, The dust collection mechanism further includes a filter frame, which is slidably installed inside the dust collection frame. The filter frame includes a filter plate and a filter plate bracket connected thereto. The filter plate is attached to the inner wall of the dust collection frame and can cover one end of the air extraction channel. At least one through groove is opened on the side wall of the filter plate bracket, and the through groove corresponds to the dust collection hole.

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