Dry coating machine

Abstract

The utility model relates to the technical field of lithium battery production, in particular to a dry coating machine which comprises a rack, an unwinding mechanism, a traction mechanism, a coating mechanism, a curing mechanism and a winding mechanism are sequentially arranged on the rack 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, 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 coating mechanism is connected with a thermalization device, the thermalization device is used for heating pole piece coating slurry for coating, the rack is provided with a control system, and the unwinding mechanism, the traction mechanism, the coating mechanism, the thermalization device, the curing mechanism and the winding mechanism are all in control connection with the control system. The pole piece coating device has the effect of improving the pole piece coating efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery production, in particular to a dry 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, and it is difficult for existing coating machines to achieve double-sided coating, resulting in low production efficiency, which needs to be solved urgently. Utility Model Content

[0004] In view of the above-mentioned deficiencies in the prior art, the present application provides a dry coating machine.

[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 coat the conductive film, the curing mechanism is used to cure the electrode coating slurry on the conductive film, the winding mechanism is used to pull the conductive film and wind it up, the coating mechanism is connected to a thermal device, the thermal device heats the electrode coating slurry for coating, the frame is provided with a control system, the unwinding mechanism, the traction mechanism, the coating mechanism, the thermal device, 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 conductive film can be stretched and pulled to the coating mechanism in cooperation with the traction 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, and the electrode coating slurry is heated by the thermal device before coating, so that the slurry coated on the conductive film can be more uniform and not easy to coagulate before being transported to the curing mechanism. After the coating is completed, the electrode coating slurry on the conductive film is immediately entered into the curing mechanism for curing, and the winding mechanism is cooperated 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 feeding, coating, electrode coating slurry curing and finished conductive film winding can be integrated to improve the degree of automation of the dry 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-mentioned technical scheme, a coating module that is symmetrical up and down is set up to meet the needs of double-sided coating of the conductive film, and cooperates with the vertical moving module that is symmetrical up and down to accurately control the vertical movement of the two groups of coating modules, so that the coating modules that are symmetrical up and down 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.

[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 coating nozzles, the mounting plate is slidably disposed on the vertical moving module, the plurality of coating nozzles are evenly distributed and connected through the mounting plate, and each of the coating nozzles 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 coating nozzles, and by setting several evenly distributed coating nozzles, 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, and in the maintenance of the coating module, compared with the roller coating method, only the corresponding coating 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 feeding module includes a storage box, the storage box is filled with electrode coating slurry and is connected to a main feed pipe, the main feed pipe is connected to two first sub-feed pipes with the same diameter, each of the coating nozzles is connected to a second sub-feed pipe, the second sub-feed pipe is connected to the first sub-feed pipe, and a pneumatic liquid booster is installed outside the storage box, and the pneumatic liquid booster is connected to the main feed pipe.

[0013] By adopting the above technical solution, under the action of the pneumatic liquid booster, the electrode coating slurry can be supplied from the storage box through the main feed pipe, the first sub-feed pipe and the second sub-feed pipe to the coating nozzle to realize the slurry output of the coating module, and two first sub-feed pipes with the same diameter are set to ensure that the electrode coating slurry is supplied evenly and equally between the coating nozzles to avoid flow rate differences.

[0014] In a preferred example, the present application can be further configured as follows: the thermal device includes an electric heating element, and the electric heating element is sleeved on the main feed pipe and is used for generating heat.

[0015] By adopting the above technical solution, the electric heating element can heat and melt the electrode coating slurry passing through the main supply pipe by contacting the surface of the main supply pipe.

[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 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.

[0019] 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.

[0020] 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.

[0021] 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.

[0022] 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.

[0023] 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.

[0024] In summary, the present application includes at least one of the following beneficial technical effects:

[0025] 1. Under the action of the unwinding mechanism, the conductive film can be unwound and stretched, and the traction mechanism is used to stretch and pull 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, and the electrode coating slurry is heated by the thermal device before coating, so that the slurry coated on the conductive film can be more uniform and not easy to coagulate before being transported to the curing mechanism. After the coating is completed, the electrode coating slurry on the conductive film is immediately entered into the curing mechanism for curing, and the winding mechanism is used for 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 the various processes such as conductive film feeding, coating, electrode coating slurry curing and finished conductive film winding can be integrated to improve the automation degree of the dry 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.

[0026] 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.

[0027] 3. The setting of the mounting plate can provide stable support and installation position for several coating nozzles, and by setting several evenly distributed coating nozzles, 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 coating nozzle 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

[0028] Figure 1 It is a schematic diagram of the overall structure of a dry coating machine in one embodiment of the present application;

[0029] Figure 2 This is a schematic diagram of the overall structure of a coating mechanism in one embodiment of the present application;

[0030] Figure 3 It is a schematic diagram of the structure of the coating mechanism in one embodiment of the present application after removing part of the frame.

[0031] Figure numerals: 1. frame; 2. unwinding mechanism; 21. rotating roller; 3. traction mechanism; 4. coating mechanism; 41. coating module; 411. mounting plate; 412. coating nozzle; 42. vertical moving module; 43. feeding module; 431. storage box; 432. main feeding pipe; 433. first sub-feeding pipe; 434. second sub-feeding pipe; 435. pneumatic liquid booster; 5. curing mechanism; 6. winding mechanism; 7. conductive film; 8. heating device; 9. smoothing device; 91. smoothing guide roller. DETAILED DESCRIPTION

[0032] 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.

[0033] 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.

[0034] 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.

[0035] A dry coating machine of the present application is described below with reference to the accompanying drawings.

[0036] Reference Figures 1 to 3 , among which, Figure 1 As shown, the dry coating machine includes a frame 1, and the frame 1 is sequentially provided with an unwinding mechanism 2, a traction mechanism 3, a coating mechanism 4, a curing mechanism 5 and a winding mechanism 6 along the conveying direction. The unwinding mechanism 2 is used to unwind the conductive film 7, and the traction mechanism 3 is used to stretch the unwound conductive film 7 to pull it to the coating mechanism 4, and the coating mechanism 4 is used to coat the conductive film 7, and 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 up, and the coating mechanism 4 is connected to a thermal device 8, and the thermal device 8 heats the electrode coating slurry for coating, and the frame 1 is provided with a control system, and the unwinding mechanism 2, the traction mechanism 3, the coating mechanism 4, the thermal device 8, 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 unwound and stretched, and the traction mechanism 3 cooperates with the conductive film 7 to The conductive film 7 is tensioned and pulled to the coating mechanism 4 to ensure the flatness of the conductive film 7, and then the coating mechanism 4 performs the coating process on the upper and lower sides of the conductive film 7 at the same time, and the electrode coating slurry is heated by the thermal device 8 before coating to melt the slurry, so that the slurry coated on the conductive film 7 can be more uniform, and it is not easy to coagulate before being transported to the curing mechanism 5. 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 it 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, and the various processes such as feeding, coating, curing of the electrode coating slurry and winding of the finished conductive film 7 can be integrated to improve the degree of automation of the dry coating machine, so that the electrode coating can be completed in a unified manner and reduce manual dependence, thereby improving the efficiency of the electrode coating.

[0037] 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 demand for double-sided coating of the conductive film 7 can be met, 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 achieve 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.

[0038] It should be noted that the above-mentioned vertical moving module 42 is responsible for driving the coating module 41 to move on the vertical axis. The vertical moving module 42 can be driven by a motor and equipped with a ball screw or a linear guide. It can also be driven by an electric cylinder to achieve precise movement in the vertical direction. It is a common moving module configuration, and the staff can configure it according to needs. It is common knowledge of technicians in this field and will not be elaborated here.

[0039] Specifically, the coating module 41 includes a mounting plate 411 and a plurality of coating nozzles 412. The mounting plate 411 is slidably arranged on the vertical moving module 42. The plurality of coating nozzles 412 are evenly distributed and connected to the mounting plate 411. Each coating nozzle 412 is connected to the feeding module 43. The arrangement of the mounting plate 411 can provide a stable support and installation position for the plurality of coating nozzles 412. By arranging a plurality of evenly distributed coating nozzles 412, it is possible to ensure that the spacing between each coating point is uniform, so that in the process of coating the conductive film 7, the electrode coating slurry can be evenly covered on the surface of the conductive film 7, thereby improving the consistency of the coating of the conductive film 7. In the maintenance of the coating module 41, compared with the roller coating method, only the corresponding coating nozzle 412 needs to be replaced, which can effectively reduce the maintenance cost and facilitate the staff to carry out maintenance and replacement.

[0040] The feeding module 43 includes a storage box 431, which contains 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 coating nozzle 412 is connected to a second sub-feeding pipe 434, which is connected to the first sub-feeding pipe 433. A pneumatic liquid booster 435 is installed outside the storage box 431. The pneumatic liquid booster 435 Connected to the main supply pipe 432, under the action of the pneumatic liquid booster 435, 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 coating 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 coating nozzles 412 is supplied evenly and in equal amounts to avoid flow rate differences.

[0041] It should be noted that the pneumatic liquid booster 435 is an air pump that uses the power of gas (usually compressed air) to increase the pressure of the liquid and achieve liquid transportation or pressurization. Among the various types of air pumps, the pneumatic liquid booster 435 emphasizes the function of liquid pressurization. This is common knowledge among technicians in this field and will not be elaborated here.

[0042] In this embodiment, the thermal device 8 includes an electric heating element, which is sleeved on the main supply pipe 432 and is used to generate heat, wherein the electric heating element can heat and melt the electrode coating slurry passing through the main supply pipe 432 by contacting the surface of the main supply pipe 432. Specifically, the electric heating element can be selected as an electric heating belt, an electric heating rod or a heating cable, etc., which can contact the pipeline or be close to the pipeline surface to heat the liquid in the pipeline. There is no limitation here.

[0043] 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.

[0044] In addition, the frame 1 is provided with a smoothing device 9, 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 9 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.

[0045] Specifically, Figure 1 and Figure 2 As shown, the smoothing device 9 includes a plurality of smoothing guide rollers 91, and the plurality of smoothing guide rollers 91 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 91. The smoothing guide rollers 91 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 91 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.

[0046] 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.

[0047] 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.

[0048] 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.

[0049] In this embodiment, if Figure 2 and Figure 3 As shown, the traction mechanism 3 and the smoothing device 9 have the same structure and implementation principle, the difference being that the traction mechanism 3 mainly serves to guide the unwound conductive film 7 into the coating mechanism 4 .

[0050] The implementation principle of a dry 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 coating 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 transported to the multiple evenly distributed coating nozzles 412 in equal amounts through the feeding module 43, and at the same time During this time, the electric heating element can heat and melt the electrode coating slurry passing through the main feed pipe 432 by contacting the surface of the main feed pipe 432, so as to complete the uniform coverage of the electrode coating slurry on the conductive film 7, and then a number of smoothing guide rollers 91 evenly spread the electrode coating slurry on the surface of the conductive film 7 to improve the 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.

[0051] 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 dry 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 stretch the unwound conductive film (7) to be pulled to the coating mechanism (4), the coating mechanism (4) is used to coat the conductive film (7), and the curing mechanism (5) is used to cure the conductive film (7). The electrode coating slurry is solidified, the winding mechanism (6) is used to pull the conductive film (7) and to wind it up, the coating mechanism (4) is connected to a thermal device (8), and the thermal device (8) heats the electrode coating slurry used for coating, the frame (1) is provided with a control system, and the unwinding mechanism (2), the pulling mechanism (3), the coating mechanism (4), the thermal device (8), the curing mechanism (5) and the winding mechanism (6) are all connected to the control system for control.

2. A dry 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 dry coating machine as claimed in claim 2, characterized in that: The coating module (41) comprises a mounting plate (411) and a plurality of coating nozzles (412); the mounting plate (411) is slidably arranged on the vertically movable module (42); the plurality of coating nozzles (412) are evenly distributed and connected to the mounting plate (411); and each of the coating nozzles (412) is connected to the feeding module (43).

4. A dry coating machine as claimed in claim 3, characterized in that: The feeding module (43) comprises a storage box (431), wherein the storage box (431) contains 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, each coating nozzle (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 pneumatic liquid booster (435) is installed outside the storage box (431), wherein the pneumatic liquid booster (435) is connected to the main feeding pipe (432).

5. A dry coating machine as claimed in claim 4, characterized in that: The thermal device (8) comprises an electric heating element, which is sleeved on the main feed pipe (432) and is used for generating heat.

6. A dry coating machine as claimed in claim 4, 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 dry coating machine as claimed in claim 1, characterized in that: The frame (1) is provided with a smoothing device (9), 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).

8. A dry coating machine as claimed in claim 7, characterized in that: The smoothing device (9) comprises a plurality of smoothing guide rollers (91), and the plurality of smoothing guide rollers (91) 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 (91).

9. A dry 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 roll, and the driving member is used to drive the rotating roller (21) to rotate.

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