Printing type coating machine

Abstract

The utility model relates to the technical field of lithium battery production, in particular to a printing type coating machine which comprises a machine frame, an unwinding mechanism, a traction mechanism, a coating mechanism, a curing mechanism and a winding mechanism are sequentially arranged on the machine frame in the conveying direction, the unwinding mechanism is used for unwinding a conducting film, and the winding mechanism is used for winding the conducting film. The traction mechanism is used for tensioning the unwound conductive film so as to pull the conductive film to the coating mechanism, the coating mechanism is used for coating the conductive film by adopting a printing technology, the curing mechanism is used for curing pole piece coating slurry on the conductive film, the winding mechanism is used for pulling the conductive film and winding the conductive film, and the coating mechanism is used for coating the pole piece coating slurry on the conductive film. The rack is provided with a control system, and the unwinding mechanism, the traction mechanism, the coating mechanism, the curing mechanism and the winding mechanism are all in control connection with the control system. The battery coating device has the effect of improving the battery coating consistency and stability.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery production, in particular to a printing coating machine. Background Art

[0002] Pole piece coating is one of the most important key technologies in the battery production process. Specifically, it refers to the process of evenly coating the pole piece coating slurry on the conductive film of the positive and negative electrode materials of the lithium battery. Pole piece coating is of great significance to the battery, mainly reflected in: the impact on the capacity of the finished battery. If the coating thickness at different positions of the pole piece is inconsistent during the coating process, the battery capacity will be too low or too high; the impact on battery consistency, such as inconsistent parameters before and after the pole piece, will cause large differences in capacity and cycle life; the impact on battery safety.

[0003] In the prior art, common coating methods include roll coating and spray coating. The roll coating method is to use a coating roller to evenly coat the electrode coating slurry on the conductive film, which can achieve relatively uniform coating and ensure the consistency of the electrode coating slurry on the surface of the conductive film. When the surface of the coating roller is uneven or worn, the entire coating roller needs to be replaced to ensure uniform coating, which is costly. The spray coating method is to use a nozzle to spray the electrode coating slurry onto the conductive film in the form of a spray. This method has a high coating speed and can improve production efficiency, but the coating uniformity is insufficient. In addition, the above traditional coating methods have certain limitations in the arrangement of electrode materials, and it is difficult to achieve a refined electrode structure. Utility Model Content

[0004] In response to the above-mentioned deficiencies in the prior art, the present application provides a printing coater, which aims to complete the coating of the electrode coating slurry on the surface of the conductive film through printing technology, and can realize granulation technology, so that the electrode coating slurry can be accurately printed on the conductive film, thereby completing high-precision electrode material arrangement, and at the same time improving the consistency and stability of the conductive film coating.

[0005] The above invention objectives of the present application are achieved through the following technical solutions:

[0006] A frame, wherein the frame is provided with an unwinding mechanism, a traction mechanism, a coating mechanism, a curing mechanism and a winding mechanism in sequence along the conveying direction, the unwinding mechanism is used to unwind the conductive film, the traction mechanism is used to stretch the unwound conductive film to pull it to the coating mechanism, the coating mechanism is used to apply material to the conductive film and arrange the material in a granular manner using a printing technology, the curing mechanism is used to cure the electrode coating slurry on the conductive film, and the winding mechanism is used to pull the conductive film and wind it up, the frame is provided with a control system, and the unwinding mechanism, the traction mechanism, the coating mechanism, the curing mechanism and the winding mechanism are all control-connected to the control system.

[0007] By adopting the above technical scheme, under the action of the unwinding mechanism, the conductive film can be unwound and stretched, and the traction mechanism is used to stretch the conductive film to the coating mechanism to ensure the flatness of the conductive film. Then the coating mechanism simultaneously uses printing technology to perform a coating process on the surface of the conductive film. After the coating is completed, it immediately enters the curing mechanism to cure the electrode coating slurry on the conductive film, and cooperates with the winding mechanism to carry out traction and winding to complete the coating production process of the conductive film. Under the action of the control system, no manual intervention is required throughout the process, and various processes such as conductive film loading, double-sided coating, electrode coating slurry curing and finished conductive film winding can be integrated to improve the degree of automation of the printing coating machine, so that the electrode coating can be completed in a unified manner and reduce manual dependence, thereby improving the efficiency of electrode coating.

[0008] In a preferred example, the present application can be further configured as follows: the coating mechanism includes two upper and lower symmetrical coating modules, two groups of upper and lower symmetrical vertical moving modules and a feeding module, the two coating modules are respectively used to coat the upper and lower surfaces of the conductive film, the vertical moving modules correspond one to one with the coating modules and the vertical moving modules are used to drive the corresponding coating modules to move vertically, the feeding module is connected and arranged on one side of the two coating modules and is used to simultaneously deliver equal amounts of electrode coating slurry to the two coating modules.

[0009] By adopting the above technical solution, a vertically symmetrical coating module is set up, which can carry out coating process on the upper and lower surfaces of the conductive film at the same time, and cooperate with the vertically symmetrical vertical moving module to accurately control the vertical movement of the two groups of coating modules, so that the vertically symmetrical coating modules can achieve synchronous coating, ensuring the accuracy of the coating position, and the feeding module delivers the electrode coating slurry to the two coating modules in equal amounts, which can ensure the consistency and stability of the coating on the upper and lower surfaces of the conductive film.

[0010] In a preferred example, the present application can be further configured as follows: the coating module includes a mounting plate and a plurality of printing heads, each of the printing heads is evenly provided with a plurality of nozzle holes, the mounting plate is slidably disposed on the vertical movable module, the plurality of printing heads are evenly distributed and connected through the mounting plate, and each of the printing heads is connected to the feeding module.

[0011] By adopting the above technical solution, the setting of the mounting plate can provide stable support and installation position for several printing nozzles, and by setting several evenly distributed printing nozzles, it can ensure that the spacing between each coating point is uniform, so that in the process of coating the conductive film, it can be ensured that the electrode coating slurry evenly covers the surface of the conductive film, thereby improving the consistency of the conductive film coating, and at the same time, by using a printing nozzle with multiple evenly distributed nozzles, precise coating can be achieved through printing technology, and in the maintenance of the coating module, compared with the roller coating method, only the corresponding printing nozzle needs to be replaced, which can effectively reduce the maintenance cost and facilitate the staff to carry out maintenance and replacement.

[0012] In a preferred example, the present application can be further configured as follows: the shape of the nozzle hole is circular, the diameter of the nozzle hole is 0.002-5 mm, and the distance between two adjacent nozzle holes is 0.002-10 mm.

[0013] By adopting the above technical solution, the tiny size and high-density arrangement of the nozzles make the coating accuracy higher. The nozzles use a size and spacing within this range, which can adapt to most conductive film production situations on the market to meet the working conditions of printing technology. The staff can adopt a nozzle solution with appropriate size and spacing according to the actual coating situation.

[0014] In a preferred example, the present application can be further configured as follows: the feeding module includes a storage box, the storage box is filled with electrode coating slurry and is connected to a main supply pipe, the main supply pipe is connected to two first sub-feed pipes with the same diameter, each of the printing nozzles is connected to a second sub-feed pipe, the second sub-feed pipe is connected to the first sub-feed pipe, and a liquid pump is arranged in the storage box, and the liquid pump is used to transport the electrode coating slurry to the main supply pipe.

[0015] By adopting the above technical solution, under the action of the liquid pump, the electrode coating slurry can be supplied from the storage box through the main supply pipe, the first sub-supply pipe and the second sub-supply pipe to the printing nozzle to realize the slurry output of the coating module, and two first sub-supply pipes with the same diameter are set to ensure that the electrode coating slurry between the printing nozzles is supplied evenly and in equal amounts, avoiding flow rate differences.

[0016] In a preferred example, the present application can be further configured as follows: the main supply pipe, the first sub-supply pipe and the second sub-supply pipe are all elastic hose structures.

[0017] By adopting the above technical solution, the elastic hose has high flexibility and bendability, and can move with the coating module to adapt to different coating conditions. At the same time, it can effectively buffer and absorb the pressure of the electrode coating slurry on the pipe wall during the transportation process.

[0018] In a preferred example, the present application can be further configured as follows: the coating mechanism also includes two unblocking discs and two groups of vertically symmetrical horizontal moving modules, the two unblocking discs and the horizontal moving modules correspond one-to-one to the two coating modules, the unblocking discs are filled with liquid, and the horizontal moving modules are used to drive the corresponding coating modules to move horizontally.

[0019] By adopting the above technical solution, the coating module can complete the horizontal and vertical displacements under the action of the horizontal moving module and the vertical moving module, so that it can be moved below the liquid level in the declogging disk before the coating mechanism stops working, so as to keep the coating module moist and avoid clogging the coating module after the slurry solidifies.

[0020] In a preferred example, the present application can be further configured as follows: the frame is provided with a smoothing device, the smoothing device is arranged between the coating mechanism and the curing mechanism and is used to level the conductive film after double-sided coating and evenly spread the electrode coating slurry on the upper and lower surfaces of the conductive film.

[0021] By adopting the above technical scheme, the smoothing device can not only pull the conductive film, but also evenly spread the slurry on the conductive film immediately after the conductive film is coated on both sides, so as to improve the adhesion of the slurry on the conductive film, reduce the loss of slurry and the difference in slurry flow on the upper and lower sides of the conductive film, and facilitate the subsequent curing mechanism to perform curing operations on the conductive film, so as to improve the quality of the finished conductive film.

[0022] In a preferred example, the present application can be further configured as follows: the smoothing device includes a plurality of smoothing guide rollers, and the plurality of smoothing guide rollers are rotatably mounted on the frame, and the coated conductive film enters the curing mechanism after bypassing the outer surfaces of all the smoothing guide rollers.

[0023] By adopting the above technical solution, the smoothing guide roller can evenly spread the electrode coating slurry on the surface of the conductive film under the conveying force of the conductive film, so as to improve the adhesion degree of the electrode coating slurry on the conductive film, and at the same time guide the coated conductive film into the curing mechanism.

[0024] In a preferred example, the present application can be further configured as follows: the unwinding mechanism includes a rotating roller and a driving member, the rotating roller is rotatably installed on the feed side of the frame, the rotating roller is coaxially provided with a conductive film roll, and the driving member is used to drive the rotating roller to rotate.

[0025] By adopting the above technical solution, under the action of the driving member, the rotating roller in the rotating state can achieve the expansion of the conductive film roll to facilitate subsequent traction, coating and curing processes.

[0026] In summary, the present application includes at least one of the following beneficial technical effects:

[0027] 1. Under the action of the unwinding mechanism, the conductive film can be unwound and stretched, and the traction mechanism is used to stretch the conductive film to the coating mechanism to ensure the flatness of the conductive film. Then the coating mechanism simultaneously performs the coating process on the upper and lower sides of the conductive film. After the coating is completed, it immediately enters the curing mechanism to cure the electrode coating slurry on the conductive film, and cooperates with the winding mechanism to carry out traction and winding to complete the coating production process of the conductive film. Under the action of the control system, no manual intervention is required throughout the process, and various processes such as conductive film loading, double-sided coating, electrode coating slurry curing and finished conductive film winding can be integrated to improve the automation degree of the printing coating machine, so that the electrode coating can be completed in a unified manner and reduce manual dependence, thereby improving the efficiency of electrode coating.

[0028] 2. By setting up vertically symmetrical coating modules, the needs of double-sided coating of the conductive film can be met, and the vertical movement modules that are symmetrical up and down can be used to accurately control the vertical movement of the two groups of coating modules, so that the vertically symmetrical coating modules can achieve synchronous coating, ensuring the accuracy of the coating position, and the feeding module delivers the electrode coating slurry to the two coating modules in equal amounts, which can ensure the consistency and stability of the coating on the upper and lower sides of the conductive film.

[0029] 3. The setting of the mounting plate can provide stable support and installation position for several print heads, and by setting several evenly distributed print heads, it can ensure that the spacing between each coating point is uniform, so that in the process of coating the conductive film, the electrode coating slurry can be evenly covered on the surface of the conductive film, thereby improving the consistency of the conductive film coating. In the maintenance of the coating module, compared with the roller coating method, only the corresponding print head needs to be replaced, which can effectively reduce the maintenance cost and facilitate the staff to carry out maintenance and replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a schematic diagram of the overall structure of a printing coating machine in one embodiment of the present application;

[0031] Figure 2 This is a schematic diagram of the overall structure of a coating mechanism in one embodiment of the present application;

[0032] Figure 3 This is a schematic diagram of the structure of a coating mechanism in one embodiment of the present application after removing part of the frame;

[0033] Figure 4 It is a schematic diagram of the structure of a printing nozzle in one embodiment of the present application.

[0034] Figure numerals: 1. frame; 2. unwinding mechanism; 21. rotating roller; 3. traction mechanism; 4. coating mechanism; 41. coating module; 411. mounting plate; 412. print nozzle; 413. nozzle hole; 42. vertical moving module; 43. feeding module; 431. storage box; 432. main feeding pipe; 433. first sub-feeding pipe; 434. second sub-feeding pipe; 44. unblocking disk; 45. horizontal moving module; 5. curing mechanism; 6. winding mechanism; 7. conductive film; 8. smoothing device; 81. smoothing guide roller. DETAILED DESCRIPTION

[0035] The following is a description of exemplary embodiments of the present application in conjunction with the accompanying drawings, including various details of the embodiments of the present application to facilitate understanding, which should be considered as merely exemplary. Therefore, it should be recognized by those of ordinary skill in the art that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of the present application. Similarly, for the sake of clarity and conciseness, the description of well-known functions and structures is omitted in the following description.

[0036] It should be noted that the terms "first", "second", etc. in the present invention are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present disclosure described herein can be implemented in an order other than those illustrated or described herein. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure.

[0037] In addition, the term "and / or" in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article, unless otherwise specified, generally means that the associated objects before and after are in an "or" relationship.

[0038] A printing coating machine of the present application is described below with reference to the accompanying drawings.

[0039] Reference Figures 1 to 3 , among which, Figure 1As shown, the printing coating machine includes a frame 1, and the frame 1 is provided with an unwinding mechanism 2, a traction mechanism 3, a coating mechanism 4, a curing mechanism 5 and a winding mechanism 6 in sequence along the conveying direction. The unwinding mechanism 2 is used to unwind the conductive film 7, and the traction mechanism 3 is used to tension the unwound conductive film 7 to pull it to the coating mechanism 4. The coating mechanism 4 is used to use printing technology to coat the conductive film 7 with materials and arrange the materials in a granular manner. The curing mechanism 5 is used to cure the electrode coating slurry on the conductive film 7, and the winding mechanism 6 is used to pull the conductive film 7 and wind it. The frame 1 is provided with a control system, and the unwinding mechanism 2, the traction mechanism 3, the coating mechanism 4, the curing mechanism 5 and the winding mechanism 6 are all connected to the control system. Under the action of the unwinding mechanism 2, the conductive film 7 can be wound. The conductive film 7 is unrolled and stretched, and the traction mechanism 3 is used to stretch and pull the conductive film 7 to the coating mechanism 4 to ensure the flatness of the conductive film 7. Then the coating mechanism 4 simultaneously uses printing technology to perform a coating process on the surface of the conductive film 7. After the coating is completed, it immediately enters the curing mechanism 5 to cure the electrode coating slurry on the conductive film 7, and cooperates with the winding mechanism 6 to pull and wind up to complete the coating production process of the conductive film 7. Under the action of the control system, there is no need for manual intervention throughout the process. The various processes such as conductive film 7 loading, double-sided coating, electrode coating slurry curing and finished conductive film 7 winding can be integrated to improve the degree of automation of the printing coating machine, so that the electrode coating can be completed in a unified manner and reduce manual dependence, thereby improving the efficiency of electrode coating.

[0040] It should be noted that, in this embodiment, the conductive film refers to a porous electrode to adapt to most lithium-ion batteries, fuel cells and other applications on the market.

[0041] Among them, Figure 2 and Figure 3 As shown, the coating mechanism 4 includes two coating modules 41 which are symmetrical in upper and lower directions, two groups of vertically symmetrical moving modules 42 which are symmetrical in upper and lower directions, and a feeding module 43. The two coating modules 41 are respectively used to coat the upper and lower surfaces of the conductive film 7. The vertically moving modules 42 correspond to the coating modules 41 one by one, and the vertically moving modules 42 are used to drive the corresponding coating modules 41 to move vertically. The feeding module 43 is connected and arranged on one side of the two coating modules 41, and is used to simultaneously deliver the electrode coating slurry in equal amounts to the two coating modules 41. By setting the coating modules 41 which are symmetrical in upper and lower directions, the coating process can be performed on the upper and lower surfaces of the conductive film 7 at the same time, and the vertically symmetrical moving modules 42 which are symmetrical in upper and lower directions can be used to accurately control the vertical movement of the two groups of coating modules 41, so that the coating modules 41 which are symmetrical in upper and lower directions can realize synchronous coating, thereby ensuring the accuracy of the coating position, and the feeding module 43 delivers the electrode coating slurry in equal amounts to the two coating modules 41, thereby ensuring the consistency and stability of the coating on the upper and lower surfaces of the conductive film 7.

[0042] Furthermore, the coating mechanism 4 also includes two unclogging disks 44 and two groups of horizontally movable modules 45 that are symmetrical in upper and lower directions. The two unclogging disks 44 and the horizontally movable modules 45 correspond one-to-one to the two coating modules 41. The unclogging disks 44 are filled with liquid, and the horizontally movable modules 45 are used to drive the corresponding coating modules 41 to move horizontally. When the coating mechanism 4 stops working, the coating module 41 can complete the horizontal and vertical displacements under the action of the horizontally movable modules 45 and the vertically movable modules 42, so that it can move below the liquid level in the unclogging disks 44 before the coating mechanism 4 stops working, so as to keep the coating module 41 in a moist state and avoid clogging the coating module 41 after the slurry solidifies.

[0043] It should be noted that the above-mentioned vertical moving module 42 and horizontal moving module 45 are respectively responsible for driving the coating module 41 to move on the horizontal axis and the vertical axis to realize dual-axis movement. The vertical moving module 42 is driven by a motor and is equipped with a ball screw or a linear guide rail. It can also be driven by an electric cylinder to realize precise movement in the vertical direction. The horizontal moving module 45 is driven by a motor and is equipped with a guide rail or a linear slide rail to realize smooth horizontal movement. Both are common moving module configurations, and the staff can configure them according to their needs. This is common knowledge of technicians in this field and will not be elaborated here.

[0044] Specifically, the coating module 41 includes a mounting plate 411 and a plurality of print heads 412, each print head 412 is evenly provided with a plurality of nozzle holes 413, the mounting plate 411 is slidably arranged on the vertical moving module 42, the plurality of print heads 412 are evenly distributed and connected to the mounting plate 411, and each print head 412 is connected to the feeding module 43, wherein the setting of the mounting plate 411 can provide a stable support and installation position for the plurality of print heads 412, and by setting a plurality of evenly distributed print heads 412, it can be ensured that the spacing between each coating point is uniform, so that in the process of coating the conductive film 7, it can be ensured that the electrode coating slurry is evenly covered to the electrode 7. The surface of the conductive film 7 is formed, thereby improving the consistency of the coating of the conductive film 7. At the same time, by using a print head 412 provided with a plurality of evenly distributed nozzles 413, in cooperation with the control function of the control system, the technician can control the particles of the slurry delivered by the nozzles 413 and arrange them according to the requirements of the technicians, so as to achieve precise coating through printing technology and realize granulation technology at the same time, thereby avoiding the traditional rough battery coating process and realizing a refined process. In the maintenance of the coating module 41, compared with the roller coating method, only the corresponding print head 412 needs to be replaced, which can effectively reduce the maintenance cost and facilitate the staff to carry out maintenance and replacement.

[0045] Furthermore, if Figure 4As shown, in the present embodiment, the nozzle hole 413 is circular in shape, the diameter of the nozzle hole 413 is 0.002-5 mm, and the spacing between two adjacent nozzle holes 413 is 0.002-10 mm. The tiny size and high-density arrangement of the nozzle holes 413 allow for higher coating accuracy and facilitate the implementation of granulation technology. The nozzle holes 413 use a size and spacing within this range, which can adapt to most conductive film 7 production conditions on the market to meet the working conditions of printing technology. The staff can adopt a nozzle hole 413 solution with a suitable size and spacing according to the actual coating situation.

[0046] It should be noted that the above-mentioned granulation technology specifically refers to the process of controlling and adjusting the particle size and distribution of the electrode coating slurry, which can control the formation of particles by controlling the size of the nozzle 413 of the printing nozzle 412, printing parameters (rate, temperature, etc.) and electrode material characteristics, and cooperate with the printing technology to achieve refined electrode material arrangement;

[0047] It should also be noted that the tiny nozzle holes 413 of the print nozzle 412 can be made by laser etching technology or developing etching technology, wherein the laser etching technology is a method of processing materials using a laser beam. By controlling the focus and intensity of the laser beam, very small structures and holes can be etched on the surface of the material. This technology can be used to manufacture nozzle holes 413 with fine apertures to achieve high-precision and high-density structures, and the developing etching technology is a method of processing on photoresist. By using photoresist, mask and chemical developer, the desired pattern can be formed on the surface of the photoresist. This technology is commonly used in integrated circuit manufacturing, and can produce fine structures and holes. It can also be applied to the manufacture of the print nozzle 412 to achieve the miniaturization of the nozzle size. The specific implementation methods and principles of the above two technologies are common knowledge known to those skilled in the art and will not be repeated here.

[0048] The feeding module 43 includes a storage box 431, which is filled with electrode coating slurry (not shown in the figure) and is connected to a main feeding pipe 432. The main feeding pipe 432 is connected to two first sub-feeding pipes 433 with the same diameter. Each print head 412 is connected to a second sub-feeding pipe 434, and the second sub-feeding pipe 434 is connected to the first sub-feeding pipe 433. A liquid pump (not shown in the figure) is arranged in the storage box 431. The liquid pump is used to transport the electrode coating slurry. The electrode coating slurry is transported to the main supply pipe 432. Under the action of the liquid pump, the electrode coating slurry can be supplied from the storage box 431 through the main supply pipe 432, the first sub-feed pipe 433 and the second sub-feed pipe 434 to the printing nozzle 412 to realize the slurry output of the coating module 41, and two first sub-feed pipes 433 with the same diameter are set to ensure that the electrode coating slurry between the printing nozzles 412 is supplied evenly and in equal amounts to avoid flow rate differences.

[0049] Furthermore, the main feed pipe 432, the first sub-feed pipe 433 and the second sub-feed pipe 434 are all elastic hose structures, wherein the elastic hose has high flexibility and bendability, and can be moved in conjunction with the coating module 41 to adapt to different coating conditions, while being able to effectively buffer and absorb the pressure of the electrode coating slurry on the pipe wall during the transportation process.

[0050] In addition, the frame 1 is provided with a smoothing device 8, which is arranged between the coating mechanism 4 and the curing mechanism 5 and is used to level the conductive film 7 after double-sided coating and evenly spread the electrode coating slurry on the upper and lower surfaces of the conductive film 7. The smoothing device 8 can smooth the slurry on the conductive film 7 immediately after the conductive film 7 is double-sided coated while playing a traction role on the conductive film 7, so as to improve the adhesion of the slurry on the conductive film 7, reduce the loss of the slurry and the difference in slurry flow on the upper and lower sides of the conductive film 7, and facilitate the subsequent curing mechanism 5 to perform a curing operation on the conductive film 7, so as to improve the quality of the finished conductive film 7.

[0051] Specifically, Figure 1 and Figure 2 As shown, the smoothing device 8 includes a plurality of smoothing guide rollers 81, and the plurality of smoothing guide rollers 81 are rotatably mounted on the frame 1. The coated conductive film 7 enters the curing mechanism 5 after bypassing the outer surfaces of all the smoothing guide rollers 81. The smoothing guide rollers 81 can smooth the electrode coating slurry on the surface of the conductive film 7 under the action of the conveying power of the conductive film 7, and the plurality of smoothing guide rollers 81 can respectively smooth the upper and lower surfaces of the conductive film 7, so as to improve the degree of adhesion of the electrode coating slurry on the conductive film 7, and at the same time play a role in guiding the coated conductive film 7 into the curing mechanism 5.

[0052] It should be noted that the curing mechanism 5 can adopt an ultraviolet (UV) curing box. Ultraviolet curing is a commonly used curing technology. It uses ultraviolet rays to irradiate the electrode coating slurry on the conductive film 7 to make it quickly cure and dry in a short time. A high-temperature oven can also be used. The hot air curing technology of the high-temperature oven is another common curing technology. It uses hot air to heat and dry the electrode coating slurry on the conductive film 7 to promote the curing process. The staff can be equipped according to needs. It is common knowledge of technicians in this field and will not be elaborated here.

[0053] In addition, if Figure 1 As shown, the unwinding mechanism 2 includes a rotating roller 21 and a driving member (not shown in the figure). The rotating roller 21 is rotatably installed on the feed side of the frame 1. The rotating roller 21 is coaxially provided with a conductive film roll. The driving member is used to drive the rotating roller 21 to rotate. Under the action of the driving member, the rotating roller 21 in the rotating state can achieve the expansion of the conductive film roll to facilitate subsequent traction, coating and curing processes, wherein the driving member can be selected as a motor as a driving source.

[0054] It should be noted that the structure and implementation principle of the winding mechanism 6 are the same as those of the unwinding mechanism 2. The difference is that the winding mechanism 6 is arranged on the discharge side of the frame 1 and is symmetrical with the unwinding mechanism 2, and the rotating roller 21 in the winding mechanism 6 winds the cured conductive film 7 into a conductive film roll by rotating to complete the unloading operation.

[0055] In this embodiment, if Figure 2 and Figure 3 As shown, the traction mechanism 3 and the smoothing device 8 have the same structure and implementation principle, the difference is that the traction mechanism 3 mainly plays the role of guiding the unwound conductive film 7 into the coating mechanism 4.

[0056] The implementation principle of a printing coating machine in the embodiment of the present application is as follows: when working, the unwinding mechanism 2 unwinds and expands the conductive film roll, cooperates with the traction mechanism 3 to tension and pull the conductive film 7 to the coating mechanism 4, and under the action of the vertical moving module 42, the multiple printing nozzles 412 in the two coating modules 41 symmetrically arranged above and below are close to each other to respectively abut the upper and lower surfaces of the conductive film 7, and then the electrode coating slurry is equally delivered to the printing nozzle 412 with multiple uniformly distributed nozzle holes 413 through the feeding module 43. Under the control of the control system, the printing method and the granulation technology are used to complete the uniform coverage of the electrode coating slurry on the conductive film 7, and then a number of smoothing guide rollers 81 are used to evenly spread the electrode coating slurry on the surface of the conductive film 7 to improve the degree of adhesion of the electrode coating slurry on the conductive film 7, and then the conductive film 7 is sent into the curing mechanism 5 to complete the slurry curing, and finally, under the traction power of the winding mechanism 6, the unloading operation of the finished conductive film 7 is completed.

[0057] The above specific implementations do not constitute a limitation on the protection scope of this application. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principles of this application should be included in the protection scope of this application.

Claims

1. A printing coating machine, characterized in that: include: A frame (1), wherein the frame (1) is provided with an unwinding mechanism (2), a traction mechanism (3), a coating mechanism (4), a curing mechanism (5) and a rewinding mechanism (6) in sequence along a conveying direction, wherein the unwinding mechanism (2) is used to unwind a conductive film (7), the traction mechanism (3) is used to tension the unwinding conductive film (7) to be pulled to the coating mechanism (4), the coating mechanism (4) is used to apply material to the conductive film (7) and arrange the material in a granular manner by using a printing technology, the curing mechanism (5) is used to cure the electrode coating slurry on the conductive film (7), and the rewinding mechanism (6) is used to pull the conductive film (7) and rewind it, and the frame (1) is provided with a control system, and the unwinding mechanism (2), the traction mechanism (3), the coating mechanism (4), the curing mechanism (5) and the rewinding mechanism (6) are all connected to the control system for control.

2. A printing coating machine as claimed in claim 1, characterized in that: The coating mechanism (4) comprises two coating modules (41) symmetrical in upper and lower directions, two groups of vertically symmetrical vertically movable modules (42) and a feeding module (43), the two coating modules (41) are respectively used to coat the upper and lower surfaces of the conductive film (7), the vertically movable modules (42) correspond one to one with the coating modules (41) and the vertically movable modules (42) are used to drive the corresponding coating modules (41) to move vertically, and the feeding module (43) is connected to one side of the two coating modules (41) and is used to simultaneously transport equal amounts of electrode coating slurry to the two coating modules (41).

3. A printing coating machine as claimed in claim 2, characterized in that: The coating module (41) includes a mounting plate (411) and a plurality of printing nozzles (412), each of the printing nozzles (412) being evenly provided with a plurality of nozzle holes (413), the mounting plate (411) being slidably disposed on the vertically movable module (42), the plurality of printing nozzles (412) being evenly distributed and connected through the mounting plate (411), and each of the printing nozzles (412) being connected to the feeding module (43).

4. A printing coating machine as claimed in claim 3, characterized in that: The spray hole (413) is circular in shape, has a diameter of 0.002-5 mm, and a distance between two adjacent spray holes (413) is 0.002-10 mm.

5. A printing coating machine as claimed in claim 3, characterized in that: The feeding module (43) comprises a storage box (431), wherein the storage box (431) is filled with electrode coating slurry and is connected to a main feeding pipe (432), wherein the main feeding pipe (432) is connected to two first sub-feeding pipes (433) of the same diameter, and each of the printing nozzles (412) is connected to a second sub-feeding pipe (434), wherein the second sub-feeding pipe (434) is connected to the first sub-feeding pipe (433), and a liquid pump is arranged in the storage box (431), and the liquid pump is used to transport the electrode coating slurry to the main feeding pipe (432).

6. A printing coating machine as claimed in claim 5, characterized in that: The main supply pipe (432), the first sub-supply pipe (433) and the second sub-supply pipe (434) are all elastic hose structures.

7. A printing coating machine as claimed in claim 2, characterized in that: The coating mechanism (4) further comprises two unclogging discs (44) and two groups of vertically symmetrical horizontal moving modules (45), the two unclogging discs (44) and the horizontal moving modules (45) corresponding one to one with the two coating modules (41), the unclogging discs (44) are filled with liquid, and the horizontal moving modules (45) are used to drive the corresponding coating modules (41) to move horizontally.

8. A printing coating machine as claimed in claim 1, characterized in that: The frame (1) is provided with a smoothing device (8), which is arranged between the coating mechanism (4) and the curing mechanism (5) and is used to level the conductive film (7) after double-sided coating and to evenly spread the electrode coating slurry on the upper and lower surfaces of the conductive film (7).

9. A printing coating machine as claimed in claim 8, characterized in that: The smoothing device (8) comprises a plurality of smoothing guide rollers (81), and the plurality of smoothing guide rollers (81) are rotatably mounted on the frame (1). The coated conductive film (7) enters the curing mechanism (5) after bypassing the outer surfaces of all the smoothing guide rollers (81).

10. A printing coating machine as claimed in claim 1, characterized in that: The unwinding mechanism (2) comprises a rotating roller (21) and a driving member, wherein the rotating roller (21) is rotatably mounted on the feed side of the frame (1), the rotating roller (21) is coaxially provided with a conductive film (7) roll, and the driving member is used to drive the rotating roller (21) to rotate.

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