Pole piece coating and conveying device and extrusion coating machine

Abstract

According to the pole piece coating and conveying device and the extrusion coating machine, the coating driving piece drives the coating roller to rotate, and the coating roller drives the pole pieces, so that the pole pieces can be orderly coated; moreover, when the coating roller adheres to the coating slurry, the bracket is driven by the moving part to move towards the direction close to the coating roller so as to drive the scraper assembly arranged on the bracket to move towards the coating roller and enable the scraper assembly to abut against the coating roller, and meanwhile, the coating driving part drives the coating roller to rotate; the scraper assembly can scrape off the slurry adhered to the whole coating roller; under the action of the dust collection driving piece, the transmission piece drives the dust collection assembly to move in the axial direction of the coating roller so as to collect and remove scraped stains. The device can automatically clean slurry adhered to the coating roller, maintain the cleanliness of the surface of the coating roller in time, and is beneficial to ensuring the production quality and efficiency of pole pieces.

Description

Technical Field

[0001] This utility model relates to the field of electrode coating, specifically to an electrode coating conveying device and an extrusion coating machine. Background Technology

[0002] During the electrode coating process, the coating roller plays a supporting and transfer role, and works with other components to ensure the smooth operation of the electrode during coating, thereby precisely controlling the thickness and uniformity of the electrode. Furthermore, the coating roller has high surface precision requirements, which helps to achieve consistent electrode coating thickness, crucial for battery performance stability, such as ensuring consistent battery capacity and charge-discharge cycle life. During production, issues can arise such as wet film sticking to the coating roller after baking in the oven, or electrode damage at the coating head causing slurry to seep through to the coating roller. If the slurry stuck to the coating roller is not cleaned promptly, it dries and hardens, adhering to the coating roller. This reduces the surface precision of the coating roller, resulting in uneven electrode coating thickness. Furthermore, the dried slurry can cut the electrode or get stuck between the die and the coating roller, causing downtime, wasting electrode material, and requiring time to re-attach the electrodes, thus reducing production quality and efficiency. Utility Model Content

[0003] In order to overcome the shortcomings of the prior art, this utility model provides an electrode coating and conveying device and an extrusion coating machine, which can solve the problem of reduced electrode production quality and efficiency caused by untimely cleaning of coating rollers in the prior art.

[0004] The technical solution adopted by this utility model to solve its technical problem is as follows: On the one hand, an electrode coating and conveying device is provided, including a frame, a cleaning mechanism, a coating drive component, and a coating roller. The coating roller is rotatably mounted on the frame, and the coating drive component is used to drive the coating roller to rotate. The cleaning mechanism includes a support, a scraper assembly, a dust suction assembly, a dust suction drive assembly, and a movable component mounted on the frame. The movable component is used to drive the support to move relative to the frame towards or away from the coating roller. The scraper assembly and the dust suction drive assembly are both mounted on the support. The scraper assembly is used to scrape off the stains on the coating roller. The dust suction drive assembly includes a dust suction drive component and a transmission component. The dust suction assembly is mounted on the transmission component. The dust suction drive component is used to drive the transmission component to move the dust suction assembly along the axial direction of the coating roller. The dust suction assembly is used to suck up the scraped-off stains.

[0005] As a further improvement to the above technical solution, the vacuuming drive component includes a vacuuming motor, the transmission component includes a transmission belt, the transmission belt is rotatably mounted on the bracket and its length direction is the same as the axial direction of the coating roller, and the rotating shaft of the vacuuming motor is connected to the transmission belt for transmission.

[0006] The dust collection assembly includes a mounting plate and a plurality of dust collection nozzles. The mounting plate is mounted on the conveyor belt, and the plurality of dust collection nozzles are mounted on the mounting plate along the axial direction of the coating roller.

[0007] As a further improvement to the above technical solution, the vacuum nozzle is mounted on the mounting plate via a connector. The connector includes a pipe clamp, a rotating shaft, and two saddle clips. The two ends of the rotating shaft are rotatably connected to the mounting plate via the two saddle clips. The pipe clamp is slidably mounted on the rotating shaft along its axial direction. The vacuum nozzle is rotatably mounted on the pipe clamp, and the rotation direction of the vacuum nozzle is perpendicular to the rotation direction of the rotating shaft.

[0008] As a further improvement to the above technical solution, the dust collection assembly also includes a connecting frame, and the mounting plate is connected to the connecting frame; the bracket is provided with a guide rail, the length direction of the guide rail is the same as the axial direction of the coating roller, and the connecting frame is slidably connected to the guide rail.

[0009] As a further improvement to the above technical solution, a negative pressure mechanism is also included, wherein several of the suction nozzles are respectively connected to the negative pressure mechanism through several air pipes;

[0010] The negative pressure mechanism includes a negative pressure host, a bypass air pipe and a ball valve. One end of the bypass air pipe is connected to the negative pressure host, and the other end is connected to several of the air pipes. The diameter of the bypass air pipe is larger than the diameter of the air pipes. The ball valve is installed on the bypass air pipe.

[0011] As a further improvement to the above technical solution, the scraper assembly includes a first pressure plate, a scraper, and a second pressure plate. The second pressure plate is provided with a limiting groove, and the scraper is located in the limiting groove and clamped between the first pressure plate and the second pressure plate. The first pressure plate and the second pressure plate are connected by several bolts.

[0012] As a further improvement to the above technical solution, the moving part includes a lead screw module, which includes a rod and a nut. The length direction of the rod is perpendicular to the axial direction of the coating roller, and a handwheel is connected to one end of the rod. The nut is connected to the bracket.

[0013] As a further improvement to the above technical solution, the lead screw module also includes a limiting block, on which a through hole is provided, the through hole extending to one side of the limiting block to form a notch, and the rod body passing through the through hole; a brake handle is connected to one side of the limiting block, the brake handle including a rotating part and a screw, one end of the screw being connected to the rotating part, and the other end passing through the notch.

[0014] As a further improvement to the above technical solution, it also includes a plurality of guide rollers installed on the frame, and the plurality of guide rollers and the coating roller are arranged in parallel, with the electrode sheet inserted between the guide rollers and the coating roller.

[0015] On the other hand, an extrusion coating machine is provided, including a coating die and the aforementioned electrode coating and conveying device, wherein the coating die is used to convey coating slurry to the electrode on the coating roller.

[0016] The beneficial effects of this invention are as follows: The coating roller is driven to rotate by the coating drive component, and the coating roller drives the electrode sheet, enabling the electrode sheet to complete coating in an orderly manner. Furthermore, when coating slurry adheres to the coating roller, the moving component drives the support to move closer to the coating roller, thereby moving the scraper assembly mounted on the support towards the coating roller and causing the scraper assembly to come into contact with the coating roller. Simultaneously, the coating drive component drives the coating roller to rotate, allowing the scraper assembly to scrape off the slurry adhering to the entire coating roller. Under the action of the dust extraction drive component, the transmission component drives the dust extraction assembly to move along the axial direction of the coating roller to remove the scraped-off dirt. This device can automatically clean the slurry adhering to the coating roller, promptly maintaining the cleanliness of the coating roller surface, which is beneficial to ensuring the production quality and efficiency of the electrode sheets. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] Figure 1 This is a schematic diagram of the structure of the negative pressure removal mechanism of the electrode coating and conveying device provided in a preferred embodiment of the present invention;

[0019] Figure 2 This is a schematic diagram of the cleaning mechanism provided in a preferred embodiment of the present invention;

[0020] Figure 3 This is a schematic diagram of the structure of the dust collection component provided in a preferred embodiment of the present invention;

[0021] Figure 4 This is a schematic diagram of the electrode coating and conveying device provided in a preferred embodiment of the present invention;

[0022] Figure 5 This is a schematic diagram of the scraper assembly provided in a preferred embodiment of the present invention;

[0023] Figure 6 yes Figure 1 Side view of the device near the scraper;

[0024] Figure 7 This is a schematic diagram of the structure of the lead screw module provided in a preferred embodiment of the present invention;

[0025] Figure 8This is a schematic diagram of the lead screw module without the handwheel provided in a preferred embodiment of the present invention.

[0026] Reference numerals: 1. Frame; 2. Cleaning mechanism; 3. Coating drive unit; 4. Coating roller; 5. Negative pressure mechanism; 6. Passing roller.

[0027] 21. Support frame; 22. Scraper assembly; 23. Vacuuming assembly; 25. Moving parts; 31. Coating motor; 51. Air hose; 52. Negative pressure unit; 53. Bypass air hose; 54. Ball valve.

[0028] 221. First pressure plate; 222. Scraper; 223. Second pressure plate; 224. Limiting groove; 225. Bolt; 231. Mounting plate; 232. Connecting bracket; 233. Vacuum nozzle; 234. Connector; 235. Pipe clamp; 236. Rotating shaft; 237. Saddle clamp; 238. Guide rail; 241. Vacuum drive component; 242. Vacuum motor; 250. Screw module; 251. Rod body; 252. Nut; 253. Handwheel; 254. Limiting block; 255. Through hole; 256. Notch; 257. Brake handle; 258. Rotating part; 259. Screw. Detailed Implementation

[0029] The following will clearly and completely describe the concept, specific structure, and technical effects of this utility model in conjunction with embodiments and accompanying drawings, so as to fully understand the purpose, features, and effects of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. Other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are all within the scope of protection of this utility model. Furthermore, all connections / connections involved in the patent do not simply refer to direct contact between components, but rather to the ability to form a better connection structure by adding or reducing connecting accessories according to specific implementation conditions. For example, fixed connections / fixed installations can use screw connections, bolt connections, pin connections, key connections, adhesive connections, mortise and tenon connections, welding, riveting, etc., as needed. For detachable connections, screw connections, bolt connections, threaded connections, snap-fit ​​connections, mortise and tenon connections, Velcro connections, etc., can be used as needed. The various technical features in this utility model can be combined interactively without contradicting each other.

[0030] Please see Figure 1 and Figure 4This utility model provides a preferred embodiment of an electrode coating and conveying device, including a frame 1, a cleaning mechanism 2, a coating drive 3, a coating roller 4, a negative pressure mechanism 5, and several guide rollers 6 mounted on the frame 1. The coating roller 4 is rotatably mounted on the frame 1. The coating drive 3 drives the coating roller 4 to rotate, and the coating roller 4 drives the electrode to complete the coating in an orderly manner. The cleaning mechanism 2 is used to automatically clean the slurry adhering to the surface of the coating roller 4, ensuring the surface accuracy of the coating roller 4, improving the electrode production quality, and preventing the dried slurry on the surface of the coating roller 4 from affecting production efficiency. The negative pressure mechanism 5 is used to provide negative pressure to concentrate and suck up the cleaned slurry. Several guide rollers 6 are used to carry the electrode to the next station.

[0031] For details, please see Figure 2 The cleaning mechanism 2 includes a support 21, a scraper assembly 22, a dust collection assembly 23, a dust collection drive assembly, and a movable component 25 mounted on the frame 1. The movable component 25 is used to drive the support 21 to move relative to the frame 1 toward or away from the coating roller 4. The scraper assembly 22 and the dust collection drive assembly are both mounted on the support 21. The scraper assembly 22 is used to scrape off the stains on the coating roller 4. The dust collection drive assembly includes a dust collection drive component 241 and a transmission component (not shown in the figure). The dust collection assembly 23 is mounted on the transmission component. The dust collection drive component 241 is used to drive the transmission component to move the dust collection assembly 23 along the axial direction of the coating roller 4. The dust collection assembly 23 is used to suck up the scraped stains. When coating slurry adheres to the coating roller 4, the moving component 25 drives the support 21 to move closer to the coating roller 4, thereby moving the scraper assembly 22 mounted on the support 21 toward the coating roller 4 and bringing the scraper assembly 22 into contact with the coating roller 4. Simultaneously, the coating drive component 3 drives the coating roller 4 to rotate, allowing the scraper assembly 22 to scrape off the slurry adhering to the entire coating roller 4. Under the action of the dust suction drive component 241, the transmission component drives the dust suction assembly 23 to move along the axial direction of the coating roller 4 to suck up the scraped-off stains. This device can automatically clean the slurry adhering to the coating roller 4, maintain the cleanliness of the coating roller 4 surface in a timely manner, and help ensure the production quality and efficiency of the electrode sheets.

[0032] The vacuum drive unit 241 includes a vacuum motor 242, and the transmission unit (not shown in the figure) includes a transmission belt (not shown in the figure). The transmission belt is rotatably mounted on the bracket 21 and its length direction is the same as the axial direction of the coating roller 4. The shaft of the vacuum motor 242 is connected to the transmission belt for transmission. Driven by the vacuum motor 242, the transmission belt can drive the vacuum assembly 23 to move back and forth along the axial direction of the coating roller 4 to remove the slurry scraped off from various parts of the coating roller 4 along the axial direction.

[0033] Please see Figure 2The dust collection assembly 23 includes a mounting plate 231, a connecting frame 232, and several dust collection nozzles 233. The mounting plate 231 is connected to the connecting frame 232. The mounting plate 231 is mounted on a conveyor belt, and the several dust collection nozzles 233 are mounted on the mounting plate 231 along the axial direction of the coating roller 4. As the conveyor belt drives the mounting plate 231 to move back and forth, the several dust collection nozzles 233 on the mounting plate 231 move back and forth accordingly, and the several dust collection nozzles 233 can remove the slurry scraped off from multiple places on the coating roller 4 at one time, resulting in high cleaning efficiency.

[0034] A guide rail 238 is provided on the bracket 21. The length direction of the guide rail 238 is the same as the axial direction of the coating roller 4. The connecting frame 232 is slidably connected to the guide rail 238. The guide rail 238 is used to guide the movement of the connecting frame 232, so that the connecting frame 232 drives the mounting plate 231 to move in a specified direction.

[0035] For further details, please see Figure 3 The suction nozzle 233 is mounted on the mounting plate 231 via a connector 234. The connector 234 includes a pipe clamp 235, a rotating shaft 236, and two saddle clips 237. Both ends of the rotating shaft 236 are rotatably connected to the mounting plate 231 via the two saddle clips 237. The pipe clamp 235 is slidably mounted on the rotating shaft 236 along its axial direction. The suction nozzle 233 is rotatably mounted on the pipe clamp 235, and the rotation direction of the suction nozzle 233 is perpendicular to the rotation direction of the rotating shaft 236. Through the rotation of the rotating shaft 236, the sliding of the pipe clamp 235 along the rotating shaft 236, and the rotation of the suction nozzle 233 itself, the angle of the suction nozzle 233 relative to the coating roller 4 can be adjusted at multiple angles to facilitate the suction of slurry from the coating roller 4.

[0036] Please see Figure 4 Several suction nozzles 233 are connected to the negative pressure mechanism 5 through several air pipes 51 respectively; the negative pressure mechanism 5 includes a negative pressure host 52, a bypass air pipe 53 and a ball valve 54. One end of the bypass air pipe 53 is connected to the negative pressure host 52, and the other end is connected to several air pipes 51. The diameter of the bypass air pipe 53 is larger than the diameter of the air pipes 51. The ball valve 54 is installed on the bypass air pipe 53. To facilitate customers and reduce the need for piping in their factory, the negative pressure unit 52 is equipped with a built-in filter. Gas and dirt from the suction nozzle 233 enter the negative pressure unit 52, where the filtered dirt is retained in the dust collection box. The gas is directly discharged into the customer's factory, meeting the customer's Class 10,000 cleanliness standard. The small diameter of the air pipe 51 can lead to insufficient airflow into the negative pressure unit 52, which can easily burn out the drive motor of the negative pressure unit 52. The bypass air pipe 53 can increase the airflow into the negative pressure unit 52. By controlling the opening and closing of the ball valve 54, the airflow into the negative pressure unit 52 via the bypass air pipe 53 can be controlled, which indirectly controls the suction speed of the suction nozzle 233.

[0037] Please see Figure 5 and Figure 6 The scraper assembly 22 includes a first pressure plate 221, a scraper 222, and a second pressure plate 223. Both the first pressure plate 221 and the second pressure plate 223 are mounted on a bracket. The second pressure plate 223 is provided with a limiting groove 224. The scraper 222 is located in the limiting groove 224 and is clamped between the first pressure plate 221 and the second pressure plate 223. The first pressure plate 221 and the second pressure plate 223 are connected by several bolts 225, and the connection between them is firm. The setting of the limiting groove 224 facilitates the fixing of the scraper 222, and the first pressure plate 221 and the second pressure plate 223 can flatten the scraper 222. In this embodiment, in order to prevent the scraper 222 from scratching the surface of the coating roller 4, the scraper 222 is made of plastic material. Under the clamping of the first pressure plate 221 and the second pressure plate 223, the scraper 222 can be prevented from bending.

[0038] Please see Figure 7 and Figure 8 The movable component 25 includes a lead screw module 250, which includes a rod 251 and a nut 252. The length direction of the rod 251 is perpendicular to the axial direction of the coating roller 4, and a handwheel 253 is connected to one end of the rod 251. The nut 252 is connected to the bracket 21. By rotating the handwheel 253, the rod 251 is rotated, thereby the nut 252 drives the bracket 21 to move relative to the rod 251, so as to move the bracket 21 closer to or away from the coating roller 4.

[0039] Furthermore, the lead screw module 250 also includes a limiting block 254, on which a through hole 255 is provided. The through hole 255 extends to one side of the limiting block 254 to form a notch 256, through which the rod 251 passes. A brake handle 257 is connected to one side of the limiting block 254. The brake handle 257 includes a rotating part 258 and a screw 259. One end of the screw 259 is connected to the rotating part 258, and the other end passes through the notch 256. The rotating part 258 drives the screw 259 to rotate, causing the notch 256 to narrow. The rod 251 is interference-fitted with the through hole 255 to restrict the rotation of the rod 251, thereby restricting the movement of the nut 252 and fixing the position of the bracket 21.

[0040] Please see Figure 1 Several guide rollers 6 and coating rollers 4 are arranged in parallel. The electrode sheets are inserted between the guide rollers 6 and coating rollers 4 to carry the electrode sheets. The coated electrode sheets are then transported to the next station to complete the subsequent production of the electrode sheets.

[0041] The coating drive unit 3 includes a coating motor 31, which is mounted on the frame 1 and its shaft is connected to the coating roller 4. The rotation of the shaft of the coating motor 31 drives the coating roller 4 to rotate, which is a simple driving method.

[0042] A preferred embodiment of this utility model also provides an extrusion coating machine, including a coating die and the electrode coating and conveying device described in the above embodiment. The coating die is used to convey coating slurry to the electrode on the coating roller 4. The speed at which the coating die conveys the slurry is matched with the speed at which the coating motor 31 drives the coating roller 4 to ensure that the thickness of the slurry on the electrode is uniform. When slurry adheres to the surface of the coating roller 4, the coating die stops conveying slurry, the scraper 222 abuts against the coating roller 4, the coating motor 31 continues to drive the coating roller 4 to rotate, and at the same time, the suction nozzle 233 sucks up the scraped slurry, thereby achieving the purpose of automatically cleaning the coating roller 4, maintaining the cleanliness of the coating roller 4 surface in a timely manner, which is beneficial to ensuring the production quality and efficiency of the electrode.

[0043] The above is a detailed description of the preferred embodiments of the present utility model. However, the present utility model is not limited to the described embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present utility model. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. An electrode sheet coating transfer device, characterized by: The application relates to a cleaning mechanism, a coating driving element and a coating roller, wherein the coating roller is rotatably installed on a rack, and the coating driving element is used for driving the coating roller to rotate; the cleaning mechanism comprises a support, a scraper assembly, a dust suction assembly, a dust suction driving assembly and a moving element installed on the rack, the moving element is used for driving the support to move towards or away from the coating roller relative to the rack, the scraper assembly and the dust suction driving assembly are both installed on the support, and the scraper assembly is used for scraping stains on the coating roller; the dust suction driving assembly comprises a dust suction driving element and a transmission element, the dust suction assembly is installed on the transmission element, and the dust suction driving element is used for driving the transmission element to move the dust suction assembly along the axial direction of the coating roller; the dust suction driving element comprises a dust suction motor, and the transmission element comprises a transmission belt which is rotatably installed on the support and has the same axial direction as the coating roller; the transmission belt is in transmission connection with the dust suction motor; the dust suction assembly comprises a mounting plate and a plurality of dust suction nozzles, the mounting plate is installed on the transmission belt, and the plurality of dust suction nozzles are installed on the mounting plate along the axial direction of the coating roller; the dust suction nozzles are installed on the mounting plate through connecting elements, the connecting elements comprise a pipe clamp, a rotating shaft and two horse clamps, the two ends of the rotating shaft are rotatably connected with the mounting plate through the two horse clamps, the pipe clamp is slidably installed on the rotating shaft along the axial direction of the rotating shaft, the dust suction nozzle is rotatably installed on the pipe clamp, and the rotating direction of the dust suction nozzle is perpendicular to the rotating direction of the rotating shaft; the dust suction assembly further comprises a connecting frame, the mounting plate is connected with the connecting frame, the support is provided with a guide rail which has the same axial direction as the coating roller, and the connecting frame is in sliding connection with the guide rail; the cleaning mechanism further comprises a negative pressure mechanism, and the plurality of dust suction nozzles are connected with the negative pressure mechanism through a plurality of air pipes; the negative pressure mechanism comprises a negative pressure host, a bypass air pipe and a ball valve, one end of the bypass air pipe is in communication with the negative pressure host, the other end of the bypass air pipe is in communication with the plurality of air pipes, the pipe diameter of the bypass air pipe is larger than that of the air pipes, and the ball valve is arranged on the bypass air pipe; the scraper assembly comprises a scraper and first and second pressing plates which are both installed on the support, the second pressing plate is provided with a limiting groove, the scraper is located in the limiting groove and is clamped between the first and second pressing plates, and the first and second pressing plates are connected through a plurality of bolts; the moving element comprises a lead screw module, the lead screw module comprises a rod body and a nut, the length direction of the rod body is perpendicular to the axial direction of the coating roller, one end of the rod body is connected with a hand wheel, and the nut is connected with the support.

2. The pole piece coating transport of claim 1, wherein: ​ ​ 3. The pole piece coating transport of claim 2, wherein: ​ 4. The pole piece coating transport of claim 3, wherein: ​ 5. The pole piece coating transport of claim 3, wherein: ​ ​ 6. The pole piece coating transport of claim 1, wherein: ​ 7. The pole piece coating transport of claim 1, wherein: ​ 8. The pole piece coating transport of claim 7, wherein: The lead screw module further comprises a limiting block, a through hole is arranged on the limiting block, the through hole extends to one side of the limiting block to form a notch, and the rod body is arranged in the through hole; one side of the limiting block is connected with a brake handle, the brake handle comprises a rotating part and a screw rod, one end of the screw rod is connected with the rotating part, and the other end is arranged in the notch.

9. The pole piece coating transport of claim 1, wherein: Further comprising several over rollers installed on the rack, and the several over rollers and the coating roller are arranged in parallel, and the pole piece is inserted between the over roller and the coating roller.

10. An extrusion coater characterized by: The coating transmission device comprises a coating die head and a pole piece coating transmission device according to any one of claims 1-9, and the coating die head is used for conveying coating slurry to the pole piece on the coating roller.

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