Coating rolling forming equipment in dry-method electrode production

Abstract

The utility model relates to coating roll forming equipment in dry-method electrode production, which is provided with a rack, a powder forming roll group is arranged at the lower part of the rack, and a coating forming roll group consisting of a plurality of rolls is arranged above the rack; the powder forming roller set comprises two pressing rollers which oppositely and inwards run; the coating forming roller set is located above the powder forming roller set, a pressure applying roller is arranged at the top of the coating forming roller set, and vertical pressure applying elements are arranged on the upper sides of the two ends of the pressure applying roller; a plurality of forming rollers are arranged below the pressure applying roller; the axes of all the forming rollers are parallel; horizontal swing adjusting mechanisms are arranged at the two ends of the pressure applying roller and drive the two ends of the pressure applying roller to move in the two directions, so that the pressure applying roller swings in the horizontal direction around the middle position, and the axis of the pressure applying roller is parallel to or horizontally intersects with the axis of the first forming roller. According to the utility model, the structure is improved, the pressure of the final pressure channel is improved, the consistency of gaps in the width direction of the final pressure channel is ensured, and a coating sheet with excellent performance is obtained.

Description

Technical Field

[0001] This utility model relates to coating roll forming equipment used in dry electrode production, and belongs to the field of mechanical equipment. Background Technology

[0002] One of the important raw materials in batteries is the electrode. Currently, electrodes can be prepared using a dry process. Generally, the powder is first pressed into a sheet by a roller assembly to form an electrode powder film (or coating). Then, it is fed into a current collector film (or substrate). Through a composite roller, the three layers of film, namely "electrode powder film-current collector film-electrode powder film", are pressed together to form a sheet of dry electrode. The sheet is then wound up and subsequently manufactured into a battery.

[0003] For dry manufacturing processes and equipment for electrode sheets, please refer to the following patent documents: Dry process electrode sheet production equipment (Chinese Patent Publication No. CN222734999U); Dry electrode preparation device (Chinese Patent Publication No. CN222320277U); Dry electrode preparation device (Chinese Patent Publication No. CN222300678U); Automated production line for dry electrode preparation of power batteries (Chinese Patent Publication No. CN116682929A); Preparation method, electrode sheet and its application of dry electrode sheets (Chinese Patent Publication No. CN115621410A); Multi-roll calender for producing electrodes by dry coating method, component for laminating electrode paths on both sides of metal foil and production using multi-roll calender (Chinese Patent Publication No. CN119137756A); Dry electrode rolling equipment and lithium battery production method (Chinese Patent Publication No. CN119773291A).

[0004] To improve production efficiency, the current common practice is to integrate the rolling manufacturing process of electrode powder films with the composite rolling process of "electrode powder film-current collector film-electrode powder film" into the production process, thereby reducing the winding and transfer of electrode powder films and thus improving efficiency.

[0005] When producing electrode powder films by roll forming, it is desirable to increase the pressure between the rollers as much as possible to compress the powder more compactly. This can improve the mechanical strength and density of the film, thereby increasing the energy density of the battery when it is assembled into a battery.

[0006] However, in current double-sided film-forming dry electrode production equipment, the roller assembly for producing electrode powder films is limited by the roller assembly structure and cannot provide extremely high pressure to roll the powder. When the rolling pressure increases, the flat roller surface will be deformed by the force, resulting in inconsistent roller spacing on the width, which in turn leads to inconsistent film thickness in the width direction of the produced electrode powder film. Ultimately, the dry electrode sheet produced will also have the problem of inconsistent film thickness, which can easily lead to uneven current distribution, unstable battery capacity, abnormal heating and other problems when it is made into a battery.

[0007] Therefore, it is necessary to improve the roll forming equipment for electrode powder films in order to apply greater pressure during the roll forming process of electrode powder films, thereby producing dry electrode sheets with better performance. Utility Model Content

[0008] The purpose of this invention is to provide a coating roll forming equipment for dry electrode production, which realizes efficient, stable and continuous production of coated sheets, increases the pressure of the final pressing channel, and ensures the consistency of the gap in the width direction of the final pressing channel, thereby obtaining coated sheets with better performance.

[0009] To achieve the above-mentioned utility model objectives, this utility model provides a coating roll forming equipment for dry electrode production, which is equipped with a frame, a powder forming roller group at the bottom, and a coating forming roller group composed of several rollers at the top.

[0010] The powder forming roller assembly includes two opposing inward-moving pressure rollers; the upper middle part of the two pressure rollers is the powder feeding channel.

[0011] The coating forming roller group is located above the powder forming roller group. The top of the coating forming roller group is equipped with a pressure roller, and the upper sides of both ends of the pressure roller are equipped with vertical pressure elements.

[0012] Several forming rollers are provided below the pressure roller, including a first forming roller, a second forming roller, and a third forming roller;

[0013] All forming rollers have parallel axes and are arranged vertically side by side. A forming roller pressing channel is formed between two adjacent forming rollers.

[0014] A final pressure channel is formed between the first forming roller and the second forming roller; a compaction channel is formed between the second forming roller and the third forming roller.

[0015] The pressure roller is equipped with a horizontal swing adjustment mechanism at both ends. The horizontal swing adjustment mechanism drives the two ends of the pressure roller to move in two directions, so that the pressure roller swings horizontally around the middle position. The axis of the pressure roller is parallel to or horizontally intersecting the axis of the first forming roller.

[0016] As a further improvement of this utility model, horizontal pressure elements are provided on the outer sides of both ends of one of the pressure rollers of the powder forming roller assembly; the horizontal pressure elements apply pressure from the first pressure roller to the second pressure roller in the horizontal direction.

[0017] As a further improvement of this utility model, a horizontal spacing adjustment mechanism is provided between the two ends of the two pressure rollers of the powder forming roller group;

[0018] The horizontal spacing adjustment mechanism adjusts the gap between the two ends of the pressure rollers.

[0019] As a further improvement of this utility model, the roller surface of the lowest forming roller in the coating forming roller group is close to the roller surface of one of the pressure rollers in the powder forming roller group, and an initial pressure channel is formed between the two.

[0020] Furthermore, a thickness adjustment mechanism is provided between the two ends of the upper and lower rollers in the roller pressing channel.

[0021] As a further improvement of this utility model, the horizontal spacing adjustment mechanism in the powder forming roller group, or the thickness adjustment mechanism at both ends of the roller pressing channel, is a roller gap adjustment mechanism.

[0022] The roller gap adjustment mechanism is provided with a first inclined block and a second inclined block, the inclined surfaces of the two inclined blocks are in contact with each other, and the outer surfaces of the two inclined blocks are parallel.

[0023] The outer side of the first inclined block is connected to the roller seat of one of the rollers;

[0024] The outer side of the second inclined block is installed into the slider, and the outer side of the slider is connected to the roller seat of another roller.

[0025] The second inclined block and the slider are connected by a sliding connection;

[0026] One end of the second inclined block is equipped with a linear drive, which drives the second inclined block to slide along its sliding connection direction.

[0027] Furthermore, the linear drive connected to the second inclined block includes a drive shaft, one end of which is inserted into the second inclined block, and a threaded transmission connection is provided between the drive shaft and the second inclined block.

[0028] The axis of the drive shaft is parallel to the sliding connection direction of the second inclined block;

[0029] The other end of the drive shaft is connected to a drive element; the drive element is a servo motor.

[0030] As a further improvement of this utility model, the vertical pressure-applying element provided above both ends of the pressure roller is a hydraulic cylinder;

[0031] The cylinder body of the hydraulic cylinder of the vertical pressure element is connected to the frame, and the piston rod of the hydraulic cylinder of the vertical pressure element is connected to the vertical pressure seat. The two sides of the vertical pressure seat are slidably connected to the frame in the vertical direction.

[0032] A pressure roller seat is connected below the vertical pressure seat, and the vertical pressure seat and the pressure roller seat are in vertical contact; the vertical pressure seat and the pressure roller seat are connected horizontally through the horizontal swing adjustment mechanism.

[0033] The left and right sides of the pressure roller seat are vertically slidably connected to the machine frame, and there is a horizontal gap between the left and right sides of the pressure roller seat and the machine frame.

[0034] Furthermore, the horizontal swing adjustment mechanism includes a nut adjusting block and a screw;

[0035] The nut adjusting block is connected to the pressure roller seat. The nut adjusting block has an internal thread in the middle, which meshes with the external thread of the screw to form a screw nut transmission mechanism.

[0036] Both ends of the screw are mounted on the bottom of the vertical pressure seat via screw seats;

[0037] One end of the screw is connected to a horizontal swing drive element, which is a servo motor and is mounted on a vertical pressure base.

[0038] Furthermore, a limit plate is fixed to the upper part of the pressure roller seat;

[0039] A displacement monitoring sensor is installed between the pressure roller seat and the vertical pressure seat;

[0040] One part of the displacement monitoring sensor is mounted on the limiting plate, and the other part of the displacement monitoring sensor is mounted on the lower part of the vertical pressure seat.

[0041] As a further improvement of this utility model, the horizontal cross angle between the axis of the pressure roller and the axis of the first forming roller is θ;

[0042] 0 < θ ≤ 2°.

[0043] The coating roll forming equipment in the dry electrode production of this utility model achieves efficient, stable and continuous production of coated sheets through structural improvements, increases the pressure of the final pressing channel, and ensures the consistency of the gap in the width direction of the final pressing channel, resulting in coated sheets with better performance. Attached Figure Description

[0044] Figure 1 This is an overall structural outline of the dry electrode production equipment of this utility model;

[0045] Figure 2This is a schematic diagram of the internal structure of the dry electrode production equipment of this utility model;

[0046] Figure 3 This is an overall structural outline of the coating roll forming equipment used in the dry electrode production process of this utility model.

[0047] Figure 4 This is a schematic diagram of the internal structure of the coating roll forming equipment in the dry electrode production of this utility model.

[0048] Figure 5 This is a schematic diagram of the overall structure of the powder forming roller assembly.

[0049] Figure 6 Schematic diagram of the overall structure of the coating forming roller assembly Figure 1 ;

[0050] Figure 7 Schematic diagram of the overall structure of the coating forming roller assembly Figure 2 ;

[0051] Figure 8 This is a schematic diagram of the material flow forming process of the coating roll forming assembly of this utility model;

[0052] Figure 9 This is a schematic diagram of the overall structure of the horizontal spacing adjustment mechanism for the powder forming roller assembly.

[0053] Figure 10 A front view of the overall structure of the horizontal spacing adjustment mechanism for the powder forming roller assembly;

[0054] Figure 11 This is a schematic diagram of the overall structure of the thickness adjustment mechanism of the coating forming roller assembly.

[0055] Figure 12 A front view of the overall structure of the thickness adjustment mechanism of the coating forming roller assembly;

[0056] Figure 13 A schematic diagram of the overall structure of the end of the pressure roller of the coating forming roller assembly;

[0057] Figure 14 This is a schematic diagram of the overall installation of the pressure roller;

[0058] Figure 15 A schematic diagram of the overall structure of the horizontal swing adjustment mechanism for the pressure roller;

[0059] Figure 16 A schematic diagram of the end structure installation of the pressure roller of the coating forming roller assembly;

[0060] Figure 17 A comparative schematic diagram showing the adjustment of the gap in the final pressure channel of the coating forming roller assembly;

[0061] Figure 18 This is a schematic diagram of the horizontal sway of the pressure roller. Detailed Implementation

[0062] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings.

[0063] This utility model relates to a coating roll forming equipment for dry electrode production, which is mainly used in dry electrode production equipment. Its structure is as follows: Figure 1 , Figure 2 As shown, a frame 1 is provided, coating roll forming components 2 are provided on the left and right sides of the frame 1, a substrate unwinding component 3 is preferably provided on the upper part of the frame 1, a composite forming component 4 is provided in the middle, and a finished product winding component 5 is provided in the middle of the lower part.

[0064] This utility model is a structural improvement to the coating roll forming assembly 2, see Figure 3 , Figure 4 The lower part has a pair of horizontally arranged roller groups, which are powder forming roller groups 21, and the upper part has several vertically arranged roller groups, which are coating forming roller groups 22.

[0065] Among them, powder forming roller group 21, such as Figure 5 As shown, it includes two pressure rollers that run inwards relative to each other, namely the first pressure roller 211 and the second pressure roller 213. A powder feeding channel is provided above the middle of the two pressure rollers for forming a powder mixture into a coating, which enters between the two pressure rollers from above the middle of the two rollers.

[0066] More preferably, the outer sides of both ends of the first pressure roller 211 are provided with horizontal pressure elements 212, preferably hydraulic cylinders, which can apply pressure from the first pressure roller 211 to the second pressure roller 213 in the horizontal direction, thereby applying pressure between the two pressure rollers and pressing the powder mixture into sheets.

[0067] More preferably, the second pressure roller 213 is provided with a horizontal spacing adjustment mechanism 214 at both ends, which can adjust the horizontal distance between the second pressure roller 213 and the first pressure roller 211, thereby adjusting the size of the gap between the second pressure roller 213 and the first pressure roller 211, as well as the consistency of the gap in the width direction, and thus adjusting the thickness of the sheet after being squeezed by the two pressure rollers, as well as the consistency of the thickness in the width direction.

[0068] Coating forming roller assembly 22, such as Figure 6 , Figure 7As shown, a pressure roller 221 is provided at the top, and vertical pressure elements 222, preferably hydraulic cylinders, are provided on the upper sides of both ends of the pressure roller 221 to apply pressure downward in the vertical direction. Below the pressure roller 221 are several forming rollers, namely a first forming roller 225, a second forming roller 226, a third forming roller 227, and even more; all forming rollers have parallel axes and are vertically arranged. A forming roller pressing channel is formed between adjacent forming rollers. In this embodiment, a final pressing channel is formed between the first forming roller 225 and the second forming roller 226, and a compaction channel is formed between the second forming roller 226 and the third forming roller 227. Of course, the third forming roller 227 can also be close to the second pressure roller 213, forming an initial pressing channel between them. The pressure roller 221 and each forming roller in the coating forming roller group 22 all have vertical roller pressing freedom. A thickness adjustment mechanism 228 is provided between the two ends of the upper and lower rollers in the roll forming channel. The gap between the two ends of the upper and lower rollers is mechanically adjusted by the thickness adjustment mechanism 228 in order to obtain roll forming sheet of corresponding thickness.

[0069] A key improvement of this invention is that the pressure roller 221 is equipped with horizontal swing adjustment mechanisms 223 at both ends, which can adjust the horizontal swing angle of the pressure roller 221 so that the axis of the pressure roller 221 intersects the axis of the first forming roller 225 at a certain angle in an "X" shape. The middle roller surfaces of the two rollers preferentially fit together, thereby offsetting the deformation in the middle of the rollers. In this case, the angle of axis intersection between the pressure roller 221 and the first forming roller 225 is adjusted according to the pressure applied by the pressure element 222, thereby adjusting the deformation compensation of the middle roller surface. The amount of material ensures that the gap between the rollers forming the final pressure channel between the first forming roller 225 and the second forming roller 226 is uniform and consistent, thereby making the width and thickness of the final output coated sheet uniform and consistent. Under the condition that the width and thickness of the coated sheet are uniform and consistent, the output pressure of the pressure element 222 can make the pressure transmitted from the pressure roller 221 to the first forming roller 225 greater, and thus the pressure of the final pressure channel between the first forming roller 225 and the second forming roller 226 greater, which can make the post-pressed density of the coated sheet higher.

[0070] like Figure 8 As shown, when the coating roll forming assembly 2 of this utility model is working, the powder raw material enters between the first pressure roller 211 and the second pressure roller 213 and is initially extruded and formed to form the initial pressed sheet A2. Then it passes through the compaction channel between the second forming roller 226 and the third forming roller 227 to form the intermediate sheet A1. Finally, it passes through the final pressing channel between the first forming roller 225 and the second forming roller 226 to form the coated sheet A, which is then output outward. Figure 8In this process, the third forming roller 227 and the second pressure roller 213 are spaced apart and do not form an initial pressure channel. That is, the powder raw material is initially formed into a sheet by extrusion by the powder forming roller group 21, and then rolled 2 to 3 times by the coating forming roller group 22 to finally press it into a coated sheet A that meets the requirements. The thickness of A2 > the thickness of A1 > the thickness of A.

[0071] It is necessary to ensure that the pressure rollers on both sides of each roller pressing channel are parallel and move synchronously to avoid uneven force on the upper and lower parts of the sheet, which could tear or break the incompletely cured powder sheet.

[0072] In the coating roll forming assembly 2 of this utility model, each roller is preferably a heated roller. The temperature can be set according to the temperature requirements for pressing and compacting the powder raw material, so that not only pressure is applied during the roll forming process, but also a suitable temperature is applied to accelerate the forming of the coating sheet A.

[0073] The gap adjustment mechanism between the two rollers, the horizontal gap adjustment mechanism 214, and the thickness adjustment mechanism 228, as shown below. Figures 9-12 As shown, both are roller gap adjustment mechanisms 23, equipped with a first inclined block 231 and a second inclined block 232. The inclined surfaces of the two inclined blocks are in contact, and their outer surfaces are parallel. The difference is that the outer surface of the first inclined block 231 is directly or through a parallel pad to the roller seat, while the outer surface of the second inclined block 232 is installed in the slider 233. The outer surface of the slider 233 is directly or through a parallel pad to another roller seat. The second inclined block 232 and the slider 233 are slidably connected. In this embodiment, the second inclined block 232 has grooves 2322 on both sides, and the slider 233... The inner side is provided with a protrusion 2332, and the protrusions 2332 on both sides are engaged in the sliding grooves 2322 on both sides. The sliding direction is parallel to the outer surface of the inclined block (especially the first inclined block 231). The slope of the inclined surface of the two inclined blocks can generally reach 15:1 or more. As a force-saving mechanism, a force ① is applied to the second inclined block 232 along its sliding connection direction. The inclined surface of the second inclined block 232 cooperates with the inclined surface of the first inclined block 231 to generate a force ② in the inclined surface direction, which in turn generates a force ③ on the first inclined block 231 that increases the distance between the outer surfaces of the two inclined blocks.

[0074] One end of the second inclined block 232 is equipped with a linear drive, which drives the second inclined block 232 to slide actively along the sliding connection direction, thereby changing the distance between the outer surfaces of the two inclined blocks, that is, changing the gap between the two rollers. In this embodiment, the linear drive includes a drive shaft 234, one end of which is threadedly connected to the second inclined block 232, and the axis of the drive shaft 234 is parallel to the sliding connection direction of the second inclined block 232. The drive shaft 234 applies a driving force to the second inclined block 232 along the sliding connection direction. The other end of the drive shaft 234 is connected to the drive element 236; a support seat 235 is preferably provided in the middle of the drive shaft 234. Depending on the installation position of the drive element 236, such as the horizontal spacing adjustment mechanism 214 in this embodiment, a transmission mechanism 237 can also be provided between the drive element 236 and the drive shaft 234. In this embodiment, it is a synchronous belt transmission mechanism, so that the drive element 236 can be installed on the outside and the driving force can be transmitted into the drive shaft 234 in the narrow space through the transmission mechanism 237; while in the thickness adjustment mechanism 228 in this embodiment, the output shaft of the drive element 236 is directly connected to the drive shaft 234.

[0075] The drive element 236 is preferably a servo motor. Since the slope of the two inclined surfaces is fixed, the pitch of the threaded connection (no backlash / clearance) between the drive shaft 234 and the second inclined block 232 is fixed, and the reduction ratio of the drive element 236 is fixed, the distance between the outer surfaces of the roller gap adjustment mechanism 23 can be precisely controlled by controlling the number of rotations / angle of the servo motor of the drive element 236, thereby controlling the distance between the two roller seats connected to it, and finally precisely controlling the gap between the rollers.

[0076] The vertical pressure element 222 connected to the pressure roller 221 of this utility model, and especially the horizontal swing adjustment mechanism 223 connected to it, are as follows: Figures 12-16 As shown.

[0077] The cylinder body of the hydraulic cylinder of the vertical pressure element 222 is connected to the frame 1 (as shown in the figure, preferably hinged). The piston rod of the hydraulic cylinder of the vertical pressure element 222 is connected to the vertical pressure seat 2222. The two sides of the vertical pressure seat 2222 are connected to the frame 1 in a vertical sliding connection.

[0078] Below the vertical pressure seat 2222 is a pressure roller seat 2212 connected to the pressure roller 221. The vertical pressure seat 2222 and the pressure roller seat 2212 are in vertical contact, but are connected horizontally via a horizontal swing adjustment mechanism 223. The left and right sides of the pressure roller seat 2212 are also vertically slidably connected to the frame 1, but there is a horizontal gap 2216 between the left and right sides of the pressure roller seat 2212 and the frame 1, allowing the pressure roller seat 2212 to drive the pressure roller 221 to adjust its horizontal position.

[0079] Horizontal swing adjustment mechanism 223, specifically as follows Figure 15 , Figure 16 As shown, the device includes a nut adjusting block 2232 and a screw 2233. The nut adjusting block 2232 is connected to the pressure roller seat 2212. The nut adjusting block 2232 has an internal thread in the middle, which meshes with the external thread of the screw 2233 to form a screw-nut transmission mechanism. The two ends of the screw 2233 are mounted on the bottom of the vertical pressure seat 2222 through a screw seat 2234. One end of the screw 2233 is connected to a horizontal swing drive element 2235. In this embodiment, the horizontal swing drive element 2235 is a servo motor, which is mounted on the vertical pressure seat 2222. Due to the limitation of the installation space, the output shaft of the horizontal swing drive element 2235 is connected to the drive end of the screw 2233 through a transmission mechanism 2236. In this embodiment, the transmission mechanism 2236 is a steering transmission mechanism composed of a pair of bevel gears. When the servo motor of the horizontal swing drive element 2235 is working, it drives the screw 2233 to rotate through the transmission mechanism 2236, which in turn causes the nut adjusting block 2232 to move horizontally along the screw 2233, and finally drives the pressure roller seat 2212 to adjust its position in the horizontal direction relative to the vertical pressure seat 2222.

[0080] Furthermore, a limiting plate 2213 is fixed to the upper part of the pressure roller seat 2212, and the limiting plate 2213 protrudes inward to form a limiting protrusion 2214; a limiting groove 2224 is opened in the horizontal direction at the lower part of the vertical pressure seat 2222, and the limiting protrusion 2214 is inserted into the limiting groove 2224, and the horizontal length of the limiting protrusion 2214 is shorter than the horizontal length of the limiting groove 2224, so that when the horizontal swing adjustment mechanism 223 is working, the pressure roller seat 2212 can drive the limiting protrusion 2214 of the limiting plate 2213 to slide left and right in the horizontal direction within the limiting groove 2224; by setting the limiting plate 2213, a vertical limit and force transmission can be further formed between the pressure roller seat 2212 and the vertical pressure seat 2222.

[0081] A displacement monitoring sensor 2238 is also provided between the pressure roller seat 2212 and the vertical pressure seat 2222. Preferably, a part of the sensor is installed on the limiting plate 2213 and a part is installed on the lower part of the vertical pressure seat 2222, so as to facilitate the detection of the horizontal displacement of the pressure roller seat 2212 relative to the vertical pressure seat 2222.

[0082] This invention applies pressure to the first forming roller 225 by setting a horizontally swaying pressure roller 221, aiming to adjust the consistency of the width and thickness of the final pressure channel formed between the first forming roller 225 and the second forming roller 226, while simultaneously increasing the pressure within the final pressure channel. The working principle of this mechanism is as follows:

[0083] 1. For example Figure 17 As shown in Figure (a), both the first forming roller 225 and the second forming roller 226 are straight pressure rollers. The gap between the two ends of the rollers is adjusted by the thickness adjustment mechanism 228 at both ends to make the gap consistent. Ideally, the final pressure channel formed between the first forming roller 225 and the second forming roller 226 will form a channel with a consistent gap everywhere along the width direction. Apply pressure Fa to both ends of the first forming roller 225 to obtain a coated sheet A with uniform thickness in the width direction.

[0084] 2. For example Figure 17 As shown in Figure (b), in reality, when the coated sheet A is rolled, the coated sheet A also exerts pressure on the roller surfaces on both sides of the channel. When the pressure roller is long and the applied pressure Fb is large, it will cause the middle position of the pressure roller to bend and deform, that is, as shown in the figure, the middle of the first forming roller 225 bends and deforms upward, and the middle of the second forming roller 226 bends and deforms downward (not considering the case where a third forming roller 227 is provided below the second forming roller 226). At this time, when the pressure Fb is applied to both ends of the first forming roller 225, the final pressing channel will form a channel that is thick in the middle and thin at both ends along the width direction, so that the thickness of the coated sheet A in the width direction after final pressing is not uniform, generally thick in the middle and thin at both ends. The thickness at both ends of the coated sheet A is basically adjusted and controlled by the thickness adjustment mechanism 228, but the thickness in the middle is affected by the rigidity of the pressure roller and the magnitude of the pressure Fb applied at both ends, and there is a lot of uncertainty.

[0085] 3. For example Figure 17 As shown in Figure (c), this is the solution provided by the present invention. A pressure roller 221 that can swing horizontally is provided on the first forming roller 225, further as follows... Figure 18 As shown, the two ends of the pressure roller 221 are driven by the horizontal swing adjustment mechanism 223, moving in two directions such that the projections of the axis of the pressure roller 221 and the axis of the first forming roller 225 in the horizontal direction are offset by an angle θ. At this time, the middle roller surface above the first forming roller 225 contacts the middle roller surface of the pressure roller 221 first. When pressure Fc is applied to the two ends of the pressure roller 221, the middle roller surface below the pressure roller 221 contacts the middle roller surface above the first forming roller 225 first, and then applies a downward force to it, causing it to pre-generate a downward deformation, thereby offsetting the roller bending deformation caused by rolling the coated sheet A. By adjusting the relationship between Fc and the angle θ, a coated sheet A with a thickness that is as uniform as possible along the width direction can be obtained. Once the thickness uniformity of the coated sheet A along the width direction can be guaranteed, the pressure Fc applied to the two ends of the pressure roller 221 can be increased to press and compact the coated sheet A as much as possible, thereby improving its structural strength and density.

[0086] In actual production, when the length of the pressure roller 221 is 1 meter, the unilateral sway distance is approximately 12 millimeters; when the length of the pressure roller 221 is 2 meters, the unilateral sway distance is approximately 20 millimeters; and when the length of the pressure roller 221 is 3 meters, the unilateral sway distance is approximately 30 millimeters. Therefore, the horizontal sway angle θ of the pressure roller 221 is generally around 1°, with a maximum of around 2°. Figure 17 , Figure 18 The angle θ is magnified to illustrate the supplementary principle; in actual production, the pressure roller 221 will gradually come into contact with the entire first forming roller 225 from the middle to both ends, and then the vertical pressure element 222 applies pressure to both ends of the pressure roller 221, which is transmitted to the first forming roller 225 through the contact of the roller surface.

[0087] The preferred embodiments of this utility model have been described in detail above, but this utility model is not limited to the embodiments described. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of this utility model, and these equivalent modifications or substitutions are all included within the scope defined by the claims of this application.

Claims

1. A coating roll forming equipment for dry electrode production, characterized in that, It is equipped with a frame, with a powder forming roller group at the bottom and a coating forming roller group composed of several rollers at the top; The powder forming roller assembly includes two opposing inward-moving pressure rollers; the upper middle part of the two pressure rollers is the powder feeding channel. The coating forming roller group is located above the powder forming roller group. The top of the coating forming roller group is equipped with a pressure roller, and the upper sides of both ends of the pressure roller are equipped with vertical pressure elements. Several forming rollers are provided below the pressure roller, including a first forming roller, a second forming roller, and a third forming roller; All forming rollers have parallel axes and are arranged vertically side by side. A forming roller pressing channel is formed between two adjacent forming rollers. A final pressure channel is formed between the first forming roller and the second forming roller; a compaction channel is formed between the second forming roller and the third forming roller. The pressure roller is equipped with a horizontal swing adjustment mechanism at both ends. The horizontal swing adjustment mechanism drives the two ends of the pressure roller to move in two directions, so that the pressure roller swings horizontally around the middle position. The axis of the pressure roller is parallel to or horizontally intersecting the axis of the first forming roller.

2. The coating roll forming equipment in dry electrode production as described in claim 1, characterized in that, The outer sides of both ends of one of the pressure rollers in the powder forming roller assembly are provided with horizontal pressure elements; the horizontal pressure elements apply pressure from the first pressure roller to the second pressure roller in a horizontal direction.

3. The coating roll forming equipment in dry electrode production as described in claim 1, characterized in that, A horizontal spacing adjustment mechanism is provided between the two ends of the two pressure rollers of the powder forming roller assembly; The horizontal spacing adjustment mechanism adjusts the gap between the two ends of the pressure rollers.

4. The coating roll forming equipment in dry electrode production as described in claim 1, characterized in that, The surface of the lowest forming roller in the coating forming roller group is close to the surface of one of the pressure rollers in the powder forming roller group, forming an initial pressure channel between them.

5. The coating roll forming equipment in dry electrode production as described in claim 4, characterized in that, A thickness adjustment mechanism is provided between the two ends of the upper and lower rollers in the roller pressing channel.

6. The coating roll forming equipment in dry electrode production as described in claim 3 or 5, characterized in that, The horizontal spacing adjustment mechanism within the powder forming roller assembly, or the thickness adjustment mechanism at both ends of the roller pressing channel, is the roller gap adjustment mechanism. The roller gap adjustment mechanism is provided with a first inclined block and a second inclined block, the inclined surfaces of the two inclined blocks are in contact with each other, and the outer surfaces of the two inclined blocks are parallel. The outer side of the first inclined block is connected to the roller seat of one of the rollers; The outer side of the second inclined block is installed into the slider, and the outer side of the slider is connected to the roller seat of another roller. The second inclined block and the slider are connected by a sliding connection; One end of the second inclined block is equipped with a linear drive, which drives the second inclined block to slide along its sliding connection direction.

7. The coating roll forming equipment in dry electrode production as described in claim 6, characterized in that, The linear drive connected to the second inclined block includes a drive shaft, one end of which is inserted into the second inclined block, and a threaded transmission connection is provided between the drive shaft and the second inclined block; The axis of the drive shaft is parallel to the sliding connection direction of the second inclined block; The other end of the drive shaft is connected to a drive element; the drive element is a servo motor.

8. The coating roll forming equipment in dry electrode production as described in claim 1, characterized in that, The vertical pressure-applying elements installed above both ends of the pressure roller are hydraulic cylinders; The cylinder body of the hydraulic cylinder of the vertical pressure element is connected to the frame, and the piston rod of the hydraulic cylinder of the vertical pressure element is connected to the vertical pressure seat. The two sides of the vertical pressure seat are slidably connected to the frame in the vertical direction. A pressure roller seat is connected below the vertical pressure seat, and the vertical pressure seat and the pressure roller seat are in vertical contact; the vertical pressure seat and the pressure roller seat are connected horizontally through the horizontal swing adjustment mechanism. The left and right sides of the pressure roller seat are vertically slidably connected to the machine frame, and there is a horizontal gap between the left and right sides of the pressure roller seat and the machine frame.

9. The coating roll forming equipment in dry electrode production as described in claim 8, characterized in that, The horizontal swing adjustment mechanism includes a nut adjusting block and a screw; The nut adjusting block is connected to the pressure roller seat. The nut adjusting block has an internal thread in the middle, which meshes with the external thread of the screw to form a screw nut transmission mechanism. Both ends of the screw are mounted on the bottom of the vertical pressure seat via screw seats; One end of the screw is connected to a horizontal swing drive element, which is a servo motor and is mounted on a vertical pressure base.

10. The coating roll forming equipment in dry electrode production as described in claim 8, characterized in that, A limit plate is fixed to the upper part of the pressure roller seat; A displacement monitoring sensor is installed between the pressure roller seat and the vertical pressure seat; One part of the displacement monitoring sensor is mounted on the limiting plate, and the other part of the displacement monitoring sensor is mounted on the lower part of the vertical pressure seat.

11. The coating roll forming equipment in dry electrode production as described in claim 1, characterized in that, The horizontal angle between the axis of the pressure roller and the axis of the first forming roller is θ; 0 < θ ≤ 2°.

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