Battery electrode coating device

Abstract

The application provides a battery pole piece coating device, which comprises a conveying belt assembly for conveying a foil; a spreading assembly located above the conveying belt assembly, the spreading assembly comprising a driving member, a plurality of rollers and a belt provided around the rollers, the driving member being in transmission connection with the rollers, and the belt being provided with a scraper for spreading slurry on the surface of the foil; and a cleaning assembly in transmission connection with the driving member and linkage with the rollers, the cleaning assembly being located on the side of the spreading assembly away from the conveying belt assembly, and the cleaning assembly being used for scraping off the slurry on the scraper. Through the arrangement, while the slurry on the surface of the foil is spread by the spreading assembly, the slurry on the scraper is scraped off by the cleaning assembly, so that the scraper will not drop the slurry on the foil during the spreading due to the attachment of a large amount of slurry, and the production quality of the foil is improved, and the uniformity of the coating of the slurry on the surface of the foil is ensured.

Description

Technical Field

[0001] The present application relates to the technical field of battery pole piece processing, and in particular to a battery pole piece coating device. Background Art

[0002] Pole sheet coating generally involves evenly applying a well-stirred slurry to the current collector and drying the organic solvent in the slurry. The coating effect significantly impacts battery capacity, internal resistance, cycle life, and safety. To ensure uniform electrode sheet coating, a scraper is typically used to evenly spread the slurry onto the foil. However, prolonged application can easily lead to a large amount of slurry adhering to the scraper, causing it to drip onto the foil during spreading, impacting foil production quality. Summary of the Invention

[0003] In view of this, the present application provides a battery electrode coating device that can prevent a large amount of slurry from adhering to the scraper and ensure the uniformity of the slurry coating on the foil surface.

[0004] Specifically, the following technical solutions are included:

[0005] The embodiment of the present application provides a battery pole piece coating device, the battery pole piece coating device comprising:

[0006] Conveyor belt assembly for conveying foil;

[0007] a coating assembly located above the conveyor belt assembly, comprising a driving member, a plurality of rollers, and a conveyor belt wound around the plurality of rollers, the driving member being in transmission connection with the rollers, the conveyor belt being provided with a scraper protruding therefrom, the scraper being used to spread the slurry on the surface of the foil;

[0008] A cleaning assembly is transmission-connected to the driving member and linked to the roller. The cleaning assembly is located on the side of the spreading assembly away from the conveyor belt assembly. The cleaning assembly is used to scrape off the slurry on the scraper.

[0009] In this embodiment, by setting up a cleaning component to be linked with the roller, the cleaning component can be used to scrape the slurry on the scraper while the spreading component is spreading the slurry on the foil surface, so as to avoid the scraper from dripping the slurry onto the foil during spreading due to a large amount of slurry attached to it. This is beneficial to improving the production quality of the foil and ensuring the uniformity of the coating of the slurry on the foil surface.

[0010] In an optional embodiment, the battery electrode coating device further includes a housing, and the coating assembly, the conveyor belt assembly, and the cleaning assembly are all installed in the housing;

[0011] The cleaning assembly includes a guide member and a cleaning member. The guide member is installed on the inner wall of the shell and is parallel to the axial direction of the roller. The cleaning member is slidably installed on the guide member and extends along the arrangement direction of the multiple rollers. The cleaning member is used to reciprocate along the length direction of the guide member under the drive of the driving member, thereby scraping off the slurry on the scraper.

[0012] In this embodiment, by arranging a cleaning member that is slidably mounted on a guide member and extends along the arrangement direction of multiple rollers, multiple scrapers can be cleaned at the same time, thereby improving the cleaning efficiency of the cleaning member; by arranging the cleaning member to reciprocate along the length direction of the guide member driven by a driving member, each scraper can be fully cleaned, ensuring that a large amount of slurry is not attached to the scraper at various locations along its own length direction.

[0013] In an optional embodiment, the surfaces on both sides of the extending direction of the cleaning member are inclined surfaces, and the two inclined surfaces gradually approach each other from the side close to the coating spreading assembly to the side away from the coating spreading assembly.

[0014] In this embodiment, not only can the cleaning member improve the scraping effect of the slurry attached to the scraper and fully clean the scraper, but the scraped slurry can also be attached to the inclined surface during the cleaning process, reducing the risk of the slurry sliding back onto the scraper.

[0015] In an optional embodiment, a flexible layer is provided on a side of the cleaning member close to the coating assembly.

[0016] In this embodiment, by providing a flexible layer on the side of the cleaning piece close to the coating assembly, a buffering protection function can be provided for the cleaning piece and the scraper, preventing the cleaning piece and the scraper from being scratched or damaged during contact.

[0017] In an optional embodiment, the cleaning assembly further includes an axle, an eccentric wheel and a pushing member, the axle is transmission-connected to the driving member and coaxially connected to the eccentric wheel, the length direction of the axle is perpendicular to the length direction of the guide member, a boss is eccentrically provided on one side surface of the eccentric wheel, one end of the pushing member is rotatably connected to the boss, and the other end of the pushing member is connected to the cleaning member.

[0018] In this embodiment, by setting the wheel axle, eccentric wheel and pushing member, the cleaning member is able to reciprocate in the length direction of the guide member, so that the cleaning member can fully clean each scraper and ensure that no large amount of slurry is attached to any part of the scraper along its own length direction.

[0019] In an alternative embodiment, the battery electrode sheet coating device further comprises a first gear and a second gear, the first gear is coaxially installed on the output shaft of the driving member, the second gear is coaxially installed on the wheel shaft, and the first gear and the second gear are engaged.

[0020] In this embodiment, the driving member and the wheel shaft are connected in a gear transmission manner, which has the advantages of accurate transmission, compact structure and high reliability. When the output shaft of the driving member rotates, the first gear rotates, and further drives the second gear and the wheel shaft to rotate, finally realizing the reciprocating movement of the cleaning member in the length direction of the guide member.

[0021] In an alternative embodiment, the battery electrode sheet coating device further comprises a main shaft, the main shaft is in transmission connection with the roller, the main shaft is rotatably installed on the housing and the length direction of the main shaft is perpendicular to the length direction of the wheel shaft, one end of the main shaft is provided with a worm gear structure, the wheel shaft is provided with a worm structure, and the worm gear structure and the worm structure are engaged.

[0022] In this embodiment, by providing the worm gear structure and the worm structure, power transmission between the two staggered shafts of the main shaft and the wheel shaft is realized. During the process of driving the wheel shaft to rotate by the driving member through the first gear and the second gear, the rotating worm structure drives the main shaft to rotate through the engagement with the worm gear structure, and further transmits power to the roller in transmission connection with the main shaft, so that the roller and the belt move, realizing the linkage of the spreading assembly and the cleaning assembly. The slurry on the scraper can be scraped off at the same time as the slurry on the surface of the foil is spread by the spreading assembly.

[0023] In an alternative embodiment, the battery electrode sheet coating device further comprises a transmission belt, the transmission belt is wound around one end of the main shaft and one end of the roller to realize synchronous rotation of the main shaft and the roller.

[0024] In this embodiment, by providing the transmission belt, the transmission connection between the main shaft and the roller is realized in a belt transmission manner, which has the advantages of smooth operation and simple structure. The main shaft and the roller can be arranged at intervals, so that the distribution of parts of the battery electrode sheet coating device is more reasonable, and interference between the parts of the battery electrode sheet coating device is avoided.

[0025] In an alternative embodiment, the battery electrode sheet coating device further comprises a slurry collecting mechanism, the slurry collecting mechanism is arranged on at least one side in the width direction of the spreading assembly.

[0026] Through this arrangement, the slurry dripping from the cleaning assembly can be collected, which facilitates the secondary use of the slurry, improves the utilization rate of the slurry, and at the same time, is beneficial to improving the cleanliness of the battery electrode sheet coating device and reducing the maintenance frequency of the battery electrode sheet coating device.

[0027] In an optional embodiment, the conveyor belt assembly includes a plurality of transmission shafts and a conveyor belt body wound around the plurality of transmission shafts, and the movement direction of the conveyor belt body is the same as the movement direction of the conveyor belt.

[0028] With this arrangement, the scraper on the conveyor belt can scrape the slurry on the surface of the foil in the reverse direction, thereby evenly smearing the slurry on the surface of the foil.

[0029] The beneficial effects of the technical solution provided in the embodiment of the present application include at least: by arranging the cleaning component to be linked with the roller, the cleaning component can be used to scrape off the slurry on the scraper while the spreading component is spreading the slurry on the surface of the foil, thereby preventing the scraper from dripping the slurry onto the foil during spreading due to a large amount of slurry attached to it, which is beneficial to improving the production quality of the foil and ensuring the uniformity of the slurry coating on the foil surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0031] Figure 1 This is one of the three-dimensional views of the battery electrode coating device provided in an embodiment of the present application;

[0032] Figure 2 The second perspective view of the battery electrode coating device provided in an embodiment of the present application;

[0033] Figure 3 A cross-sectional view of a battery electrode coating device provided in an embodiment of the present application;

[0034] Figure 4 A partial cross-sectional enlarged view of a battery electrode coating device provided in an embodiment of the present application;

[0035] Figure 5 Schematic diagram of the distribution of rollers and drive shafts in the battery electrode coating device provided in an embodiment of the present application.

[0036] The reference numerals in the figures represent respectively:

[0037] 1- conveyor belt assembly; 11- transmission shaft; 12- conveyor belt body;

[0038] 2-spreading assembly; 21-driving member; 22-roller; 221-roller shaft; 23-conveying belt; 231-scraper;

[0039] 3-cleaning assembly; 31-guide member; 32-cleaning member; 321-inclined surface; 33-axle; 331-worm structure; 34-eccentric wheel; 341-boss; 35-pushing member;

[0040] 4-shell; 41-first shell; 42-second shell;

[0041] 51-first gear; 52-second gear;

[0042] 6-main shaft; 61-worm gear structure;

[0043] 7- Transmission belt.

[0044] The above drawings illustrate specific embodiments of the present application, which will be described in more detail below. These drawings and the textual description are not intended to limit the scope of the present application in any way, but rather to illustrate the concepts of the present application to those skilled in the art by reference to specific embodiments. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0046] The directional nouns involved in the embodiments of this application, such as "upper", "lower", "side", etc., are generally expressed in the form of Figure 1 The relative relationships shown in the figure are used as a reference, and these directional terms are used only to more clearly describe the relationship between structures, not to describe absolute directions. When the product is placed in different postures, the direction may change, for example, "up" and "down" may be interchangeable.

[0047] Unless otherwise defined, all technical terms used in the examples of this application have the same meanings as those commonly understood by those skilled in the art. Some technical terms that appear in the examples of this application are explained below.

[0048] In order to make the technical solutions and advantages of the present application clearer, the implementation methods of the present application will be described in further detail below with reference to the accompanying drawings.

[0049] Pole sheet coating generally involves evenly applying a well-stirred slurry to the current collector and drying the organic solvent in the slurry. The coating effect significantly impacts battery capacity, internal resistance, cycle life, and safety. To ensure uniform electrode sheet coating, a scraper is typically used to evenly spread the slurry onto the foil. However, prolonged application can easily lead to a large amount of slurry adhering to the scraper, causing it to drip onto the foil during spreading, impacting foil production quality.

[0050] In response to the above technical problems, an embodiment of the present application provides a battery electrode coating device.

[0051] like Figure 1 As shown, the battery electrode coating device includes a conveyor belt assembly 1, a coating assembly 2 and a cleaning assembly 3.

[0052] The conveyor belt assembly 1 is used to convey foil materials. The foil materials with slurry attached to the surface are placed on the conveyor belt assembly 1 and move along with the conveyor belt assembly 1 .

[0053] The coating assembly 2 is located above the conveyor belt assembly 1. The coating assembly 2 includes a driving member 21, multiple rollers 22, and a conveyor belt 23 wound around the multiple rollers 22. The driving member 21 is transmission-connected to the rollers 22. The conveyor belt 23 is protruding with a scraper 231, which is used to spread the slurry on the surface of the foil.

[0054] The cleaning component 3 is in transmission connection with the driving member 21 and is linked with the roller 22 . The cleaning component 3 is located on the side of the spreading component 2 away from the conveyor belt component 1 . The cleaning component 3 is used to scrape off the slurry on the scraper 231 .

[0055] Specifically, the number of the rollers 22 is at least two, for example Figure 5 As shown, there are two rollers 22. Multiple rollers 22 of equal size are spaced apart and arranged parallel to each other. The conveyor belt 23 is wound around the multiple rollers 22. There may be one or more driving members 21, each driving member 21 being in driving connection with at least one roller 22. Driven by the driving members 21, the rollers 22 rotate about their central axes, thereby driving the conveyor belt 23, causing the scraper 231 on the conveyor belt 23 to scrape the slurry off the foil.

[0056] There are multiple scrapers 231 , which are spaced apart along the length of the conveyor belt 23 , so as to circulate and scrape the slurry on the surface of the foil when the conveyor belt 23 rotates, so that the slurry is evenly distributed on the surface of the foil.

[0057] like Figure 2 As shown, the extension direction of the scraper 231 is parallel to the width direction of the conveyor belt 23. For example, the width of the conveyor belt 23 and the length of the scraper 231 are both greater than the belt surface width of the conveyor belt assembly 1, so that the scraper 231 can fully clean the slurry on the surface of the foil and prevent uneven distribution of slurry in local areas of the foil.

[0058] Optionally, the conveyor belt 23 is made of metal material, the scraper 231 is made of rubber material, and the conveyor belt 23 and the scraper 231 are connected by welding or fusion.

[0059] like Figure 1 As shown, the cleaning component 3 is located above the coating component 2. When the scraper 231 circulates along with the conveyor belt 23, the cleaning component 3 can remove the slurry attached to the surface of the scraper 231 to prevent the scraper 231 from re-attaching the residual slurry to the surface of the foil.

[0060] Since the cleaning component 3 is connected to the driving member 21 and is linked to the roller 22, the cleaning component 3 can move synchronously with the coating component 2, so that when the coating component 2 spreads the slurry on the surface of the foil, the slurry attached to the surface of the scraper 231 is simultaneously removed, so that the scraper 231 remains clean.

[0061] Optionally, the driving member 21 is a motor with multiple adjustable speeds, and the moving speed of the conveyor belt 23 is adjusted by adjusting the output speed of the driving member 21 .

[0062] The battery electrode coating device provided in the embodiment of the present application is configured to be linked with the roller 22 by setting a cleaning component 3. At the same time as the coating component 2 is coating the slurry on the surface of the foil, the cleaning component 3 can be used to scrape off the slurry on the scraper 231, thereby preventing the scraper 231 from dripping the slurry onto the foil during coating due to a large amount of slurry attached to it. This is beneficial to improving the production quality of the foil and ensuring the uniformity of the coating of the slurry on the surface of the foil.

[0063] In a specific embodiment, the battery electrode coating device further includes a housing 4, in which the coating assembly 2, the conveyor belt assembly 1, and the cleaning assembly 3 are all installed. The cleaning assembly 3 includes a guide member 31 and a cleaning member 32. The guide member 31 is installed on the inner wall of the housing 4 and is parallel to the axial direction of the roller 22. The cleaning member 32 is slidably installed on the guide member 31 and extends along the arrangement direction of the multiple rollers 22. The cleaning member 32 is used to reciprocate along the length direction of the guide member 31 under the drive of the driving member 21, thereby scraping off the slurry on the scraper 231.

[0064] like Figure 1 As shown, the housing 4 includes a first shell 41 and a second shell 42 connected to each other. The coating assembly 2 and the cleaning assembly 3 are both located inside the first shell 41 , and the conveyor belt assembly 1 is located inside the second shell 42 .

[0065] Specifically, the guide member 31 is a guide rail, a guide rod, etc., for example Figure 3 As shown, the guide member 31 is rod-shaped, with both ends fixed to the inner wall of the first housing 41 . One end of the cleaning member 32 is movably sleeved on the guide member 31 and can move along the guide member 31 .

[0066] The length direction of the guide member 31 is parallel to the length direction of the scraper 231. Under the guidance of the guide member 31, the cleaning member 32 moves along the length direction of the guide member 31, thereby fully cleaning the scraper 231 to ensure that no large amount of slurry is attached to any part of the scraper 231 along its own length direction.

[0067] The cleaning member 32 is in transmission connection with the driving member 21. The power of the driving member 21 is transmitted to the cleaning member 32, causing the cleaning member 32 to reciprocate along the length direction of the guide member 31. The extension direction of the cleaning member 32 is perpendicular to the length direction of the scraper 231, so that multiple scrapers 231 can be cleaned simultaneously. For example, the length of the cleaning member 32 is greater than or equal to the length of the coating assembly 2, which facilitates the cleaning member 32 to clean all scrapers 231 above the roller 22 in one movement, thereby improving the cleaning efficiency of the cleaning member 32.

[0068] There are one or more guide members 31 , for example, there are two guide members 31 , and the two guide members 31 are spaced apart along the length direction of the cleaning member 32 to improve the stability of the cleaning member 32 .

[0069] Exemplarily, the driving member 21 is a motor with multiple adjustable speeds, and the speed of the linear movement of the cleaning member 32 is adjusted by adjusting the output speed of the driving member 21 .

[0070] In this embodiment, by arranging a cleaning member 32 that is slidably mounted on the guide member 31 and extending along the arrangement direction of the plurality of rollers 22, a plurality of scrapers 231 can be cleaned at the same time, thereby improving the cleaning efficiency of the cleaning member 32; by arranging the cleaning member 32 to reciprocate along the length direction of the guide member 31 under the drive of the driving member 21, each scraper 231 can be fully cleaned, thereby ensuring that a large amount of slurry is not attached to the scraper 231 at various locations along its own length direction.

[0071] In a further embodiment, the surfaces on both sides of the extension direction of the cleaning member 32 are inclined surfaces 321 , and the two inclined surfaces 321 gradually approach each other from the side close to the coating assembly 2 to the side far away from the coating assembly 2 .

[0072] like Figure 3 As shown, the cross section of the cleaning member 32 is trapezoidal, and the surfaces on the left and right sides of the cleaning member 32 are both inclined surfaces 321, and the horizontal distance between the two inclined surfaces 321 gradually decreases from bottom to top.

[0073] Through this arrangement, not only can the cleaning member 32 improve its scraping effect on the slurry attached to the scraper 231 and fully clean the scraper 231, but the scraped slurry can also be attached to the inclined surface 321 during the cleaning process, reducing the risk of the slurry sliding back onto the scraper 231.

[0074] In one embodiment, a flexible layer is provided on a side of the cleaning member 32 close to the coating assembly 2 .

[0075] Specifically, a flexible layer is provided on the lower surface of the cleaning member 32 , and the flexible layer is made of a flexible material such as rubber or silicone, which can prevent the cleaning member 32 and the scraper 231 from being scratched or damaged during contact.

[0076] The flexible layer is in strip or sheet form. For example, the flexible layer is in sheet form and completely covers the lower surface of the cleaning member 32 . Alternatively, the flexible layer is in strip form, and multiple flexible layers are distributed at intervals or adjacently on the lower surface of the cleaning member 32 .

[0077] In this embodiment, by providing a flexible layer on the side of the cleaning piece 32 close to the coating assembly 2, a buffering protection function can be provided for the cleaning piece 32 and the scraper 231, preventing the cleaning piece 32 and the scraper 231 from being scratched or damaged during contact.

[0078] In one embodiment, the cleaning assembly 3 also includes an axle 33, an eccentric wheel 34 and a pusher 35. The axle 33 is transmission-connected to the driving member 21 and coaxially connected to the eccentric wheel 34. The length direction of the axle 33 is perpendicular to the length direction of the guide member 31. A boss 341 is eccentrically provided on one side surface of the eccentric wheel 34. One end of the pusher 35 is rotatably connected to the boss 341, and the other end of the pusher 35 is connected to the cleaning member 32.

[0079] like Figure 3 As shown, the wheel shaft 33 and the eccentric wheel 34 are located on one side of the length direction of the guide member 31. The wheel shaft 33 is connected to the driving member 21. The power of the driving member 21 is transmitted to the wheel shaft 33, causing the wheel shaft 33 to rotate around its own central axis and drive the eccentric wheel 34 to rotate around its own central axis.

[0080] Optionally, a bearing ring is provided at the connection between the wheel axle 33 and the housing 4 to reduce the rotational friction of the wheel axle 33 and prevent the wheel axle 33 from breaking due to long-term use.

[0081] like Figure 4 As shown, the boss 341 is eccentrically arranged on the surface of the eccentric wheel 34 away from the wheel shaft 33. Since one end of the pushing member 35 is rotatably connected to the boss 341, and the other end of the pushing member 35 is connected to the cleaning member 32, when the boss 341 rotates with the eccentric wheel 34, the pushing member 35 can drive the cleaning member 32 to produce a linear motion along the length direction of the guide member 31, so that the cleaning member 32 can reciprocate along the length direction of the guide member 31.

[0082] In this embodiment, by setting the wheel axle 33, the eccentric wheel 34 and the pushing member 35, the reciprocating motion of the cleaning member 32 in the length direction of the guide member 31 is achieved, so that the cleaning member 32 can fully clean each scraper 231, ensuring that no large amount of slurry is attached to the scraper 231 at any point along its own length direction.

[0083] Furthermore, the battery electrode coating device also includes a first gear 51 and a second gear 52. The first gear 51 is coaxially mounted on the output shaft of the driving member 21, and the second gear 52 is coaxially mounted on the axle 33. The first gear 51 and the second gear 52 are meshed.

[0084] The driving member 21 is mounted on the first housing 41, as shown in FIG. Figure 4 As shown, the extension direction of the output shaft of the driving member 21 is parallel to the length direction of the axle 33, the second gear 52 is fixedly mounted on the lower end of the axle 33, and the first gear 51 and the second gear 52 are engaged in the horizontal direction.

[0085] In this embodiment, the driving member 21 and the axle 33 are connected by gear transmission, which has the advantages of accurate transmission, compact structure and high reliability. When the output shaft of the driving member 21 rotates, it drives the first gear 51 to rotate, and further drives the second gear 52 and the axle 33 to rotate, ultimately realizing the reciprocating motion of the cleaning member 32 in the length direction of the guide member 31.

[0086] In one embodiment, the battery electrode coating device also includes a main shaft 6, which is transmission-connected to the roller 22. The main shaft 6 is rotatably mounted on the shell 4 and the length direction of the main shaft 6 is perpendicular to the length direction of the wheel axle 33. A worm gear structure 61 is provided at one end of the main shaft 6, and a worm structure 331 is provided on the wheel axle 33. The worm gear structure 61 and the worm structure 331 are meshed.

[0087] Specifically, if Figure 2 As shown, one end of the main shaft 6 is rotatably connected to the first housing 4, and the worm gear structure 61 is provided at the other end of the main shaft 6 and can rotate synchronously with the main shaft 6. Optionally, a bearing ring is provided at the connection between the main shaft 6 and the housing 4 to reduce the rotational friction of the main shaft 6 and prevent the main shaft 6 from breaking due to long-term use.

[0088] In this embodiment, by setting a worm gear structure 61 and a worm structure 331, power transmission between the two staggered axes of the main shaft 6 and the wheel shaft 33 is achieved. In the process of the driving member 21 driving the wheel shaft 33 to rotate through the first gear 51 and the second gear 52, the rotating worm structure 331 drives the main shaft 6 to rotate by engaging with the worm gear structure 61, and further transmits power to the roller 22 connected to the main shaft 6, so that the roller 22 and the conveyor belt 23 move, realizing the linkage of the coating component 2 and the cleaning component 3, and being able to use the cleaning component 3 to scrape off the slurry on the scraper 231 while the coating component 2 is spreading the slurry on the foil surface.

[0089] The battery electrode coating device further includes a transmission belt 7 , which is wound around one end of the main shaft 6 and one end of the roller 22 to achieve synchronous rotation of the main shaft 6 and the roller 22 .

[0090] like Figure 2 As shown, the roller 22 has a roller shaft 221 , which extends outward relative to the first housing 41 , and the transmission belt 7 is wound around the main shaft 6 and the roller shaft 221 , thereby realizing a transmission connection between the main shaft 6 and the roller 22 .

[0091] In this embodiment, by providing a transmission belt 7, a belt drive method is adopted to realize the transmission connection between the main shaft 6 and the roller 22, which has the advantages of smooth operation and simple structure. The main shaft 6 and the roller 22 can be arranged at intervals, and the distribution of the components of the battery electrode coating device is more reasonable, thereby avoiding interference between the components of the battery electrode coating device.

[0092] The battery electrode coating device further includes a slurry collecting mechanism, which is arranged on at least one side of the coating assembly 2 in the width direction.

[0093] like Figure 3 As shown, the horizontal direction is the width direction of the coating component 2, and there are one or more slurry collecting mechanisms. One or more slurry collecting mechanisms can be set only on one side of the coating component 2 in the width direction, or one or more slurry collecting mechanisms can be set on both sides of the coating component 2 in the width direction.

[0094] Specifically, the slurry collecting mechanism is installed in the first shell 41 and is located below the cleaning component 3. The slurry collecting mechanism is used to collect the slurry dripping from the cleaning component 3, which facilitates the secondary use of the slurry and improves the utilization rate of the slurry. At the same time, it is also beneficial to improve the cleanliness of the battery electrode coating device and reduce the maintenance frequency of the battery electrode coating device.

[0095] In one embodiment, the conveyor belt assembly 1 includes a plurality of transmission shafts 11 and a conveyor belt body 12 wound around the plurality of transmission shafts 11 . The moving direction of the conveyor belt body 12 is the same as the moving direction of the conveyor belt 23 .

[0096] The transmission shaft 11 is in transmission connection with a driving device such as a motor, a plurality of transmission shafts 11 of the same size are distributed in parallel at intervals, the conveying belt body 12 is arranged around the plurality of transmission shafts 11, and the conveying belt body 12 is moved under the driving of the transmission shafts 11, thereby driving the foil on the conveying belt body 12 to move.

[0097] The transmission shaft 11 and the roller 22 rotate in the same direction, so that the movement direction of the conveying belt body 12 is the same as that of the conveying belt 23.

[0098] In this embodiment, the conveying belt assembly 1 and the spreading assembly 2 are both belt transmission mechanisms, the conveying belt 23 and the conveying belt body 12 are both divided into upper and lower layers, the movement direction of the lower layer of the conveying belt 23 is opposite to that of the upper layer of the conveying belt body 12 by setting the movement direction of the conveying belt body 12 to be the same as that of the conveying belt 23, so that the scraper 231 on the conveying belt 23 can scrape the slurry on the surface of the foil in reverse, thereby evenly spreading the slurry on the surface of the foil.

[0099] Optionally, a supporting plate is arranged below the upper conveying belt body 12, and the supporting plate is used to prevent the conveying belt body 12 from collapsing.

[0100] In the present application, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. The term "a plurality of" refers to two or more, unless otherwise explicitly limited.

[0101] Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. The present application is intended to cover any variations, uses or adaptive changes of this application following the general principles thereof and including those expressly mentioned or implicitly suggested by the specification. The specification and examples are only regarded as illustrative.

[0102] It should be understood that the present application is not limited to the precise structures described above and illustrated in the drawings and that various modifications and changes can be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

Claims

1. A battery pole piece coating device, characterized in that: The battery pole piece coating device comprises: A conveyor belt assembly (1) for conveying foil; A coating assembly (2) is located above the conveyor belt assembly (1), the coating assembly (2) comprising a driving member (21), a plurality of rollers (22), and a conveyor belt (23) wound around the plurality of rollers (22), the driving member (21) being in transmission connection with the rollers (22), the conveyor belt (23) being provided with a scraper (231) protruding therefrom, the scraper (231) being used for coating the slurry on the surface of the foil; a cleaning assembly (3) which is in driving connection with the driving member (21) and is linked to the roller (22); the cleaning assembly (3) is located on a side of the coating assembly (2) facing away from the conveyor belt assembly (1); and the cleaning assembly (3) is used to scrape off the slurry on the scraper (231); The battery electrode coating device further comprises a housing (4), wherein the coating assembly (2), the conveyor belt assembly (1) and the cleaning assembly (3) are all installed in the housing (4); The cleaning assembly (3) comprises a guide member (31) and a cleaning member (32), wherein the guide member (31) is mounted on the inner wall of the housing (4) and is parallel to the axial direction of the roller (22), and the cleaning member (32) is slidably mounted on the guide member (31) and extends along the arrangement direction of the plurality of rollers (22), and the cleaning member (32) is used to reciprocate along the length direction of the guide member (31) under the drive of the driving member (21), thereby scraping off the slurry on the scraper (231); The cleaning assembly (3) further comprises a wheel shaft (33), an eccentric wheel (34) and a pushing member (35); the wheel shaft (33) is transmission-connected to the driving member (21) and coaxially connected to the eccentric wheel (34); the length direction of the wheel shaft (33) is perpendicular to the length direction of the guide member (31); a boss (341) is eccentrically provided on one side surface of the eccentric wheel (34); one end of the pushing member (35) is rotatably connected to the boss (341), and the other end of the pushing member (35) is connected to the cleaning member (32); The battery electrode coating device further comprises a first gear (51) and a second gear (52), wherein the first gear (51) is coaxially mounted on the output shaft of the driving member (21), and the second gear (52) is coaxially mounted on the wheel shaft (33), and the first gear (51) and the second gear (52) are meshed; The battery electrode coating device further comprises a main shaft (6), the main shaft (6) being transmission-connected to the roller (22), the main shaft (6) being rotatably mounted on the housing (4), and the length direction of the main shaft (6) being perpendicular to the length direction of the wheel shaft (33), one end of the main shaft (6) being provided with a worm gear structure (61), the wheel shaft (33) being provided with a worm gear structure (331), the worm gear structure (61) being meshed with the worm gear structure (331); The battery electrode coating device further comprises a transmission belt (7), wherein the transmission belt (7) is wound around one end of the main shaft (6) and one end of the roller (22) to achieve synchronous rotation of the main shaft (6) and the roller (22).

2. The battery pole piece coating device according to claim 1, characterized in that: The surfaces on both sides of the cleaning member (32) in the extension direction are inclined surfaces (321), and the two inclined surfaces (321) gradually approach each other from the side close to the coating assembly (2) to the side far away from the coating assembly (2).

3. The battery pole piece coating device according to claim 1, characterized in that: A flexible layer is provided on one side of the cleaning piece (32) close to the coating assembly (2).

4. The battery pole piece coating device according to claim 1, characterized in that: The battery pole piece coating device further comprises a slurry collecting mechanism, which is arranged on at least one side in the width direction of the coating assembly (2).

5. The battery pole piece coating device according to claim 1, characterized in that: The conveyor belt assembly (1) comprises a plurality of transmission shafts (11) and a conveyor belt body (12) wound around the plurality of transmission shafts (11); the movement direction of the conveyor belt body (12) is the same as the movement direction of the conveyor belt (23).

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