Dry coating equipment

Abstract

The utility model discloses dry coating equipment which comprises a box body, a material mixing mechanism and a coating mechanism, and the box body is provided with a first cavity and a second cavity; the mixing mechanism is arranged in the first cavity, and the coating mechanism is arranged in the second cavity; the coating mechanism comprises a rolling part, a winding part, an unwinding part and a stock bin part, the rolling part comprises a plurality of rollers which are arranged side by side, a rolling gap is formed between every two adjacent rollers, a driving part is arranged on one side of each roller in the axial direction of the rollers, and a driving part is arranged on the other side of each roller; and the driving parts of two adjacent rollers are positioned on different sides. Therefore, the material mixing mechanism and the coating mechanism can be arranged in the different cavities of the box body respectively, the box body can provide a dry inert environment or a water-free and oxygen-free closed environment required by the coating process so as to avoid pollution, and toxic gas generated by the coating process can be recycled so as to avoid harm to human health and environmental safety caused by leakage.

Description

Technical Field

[0001] This utility model relates to the field of battery production technology, and more specifically, to a dry coating equipment. Background Technology

[0002] In the field of advanced materials and energy storage, sulfide electrolytes have become a research hotspot in electrochemical energy storage devices such as solid-state batteries due to their high ionic conductivity, good chemical stability, and potential for increasing energy density. However, the preparation process of sulfide electrolyte films also faces many technical challenges, such as their instability in air and environmental control issues during production. These problems greatly limit the large-scale application and commercialization of sulfide electrolyte films.

[0003] First, sulfide electrolyte films are extremely sensitive to water and oxygen in the air. When exposed to air, these electrolytes undergo violent chemical reactions with water and oxygen, leading to a sharp deterioration in material properties, such as a decrease in ionic conductivity and structural damage, which severely affects their performance in electrochemical devices.

[0004] Secondly, the production process of sulfide electrolyte membranes generates toxic hydrogen sulfide gas. Hydrogen sulfide is a colorless, highly toxic gas with a strong, pungent odor, posing a serious threat to human health and the environment. If these harmful gases are not effectively captured and treated during production, they will not only directly threaten the safety of production personnel but may also leak into the atmosphere, causing environmental pollution and ecological damage. Utility Model Content

[0005] The purpose of this invention is to provide a new technical solution for dry coating equipment.

[0006] According to one aspect of the present invention, a dry coating apparatus is provided, comprising:

[0007] A housing having a first cavity and a second cavity;

[0008] A mixing mechanism and a coating mechanism are provided, wherein the mixing mechanism is located in the first cavity and the coating mechanism is located in the second cavity;

[0009] The coating mechanism includes a roller pressing component, which includes multiple rollers arranged side by side, with a roller pressing gap formed between two adjacent rollers. Along the axial direction of the rollers, a driving member is provided on one side of each roller, and the driving members of two adjacent rollers are located on different sides.

[0010] The coating mechanism further includes a winding component, an unwinding component, and a hopper component. The winding component and the unwinding component are arranged along a direction perpendicular to the arrangement of the plurality of rollers. The hopper component is located above the roller pressing component and is oriented toward the first roller pressing gap.

[0011] Optionally, the driving component includes a motor and a reducer, with the output end of the motor connected to one side of the reducer and the other side of the reducer connected to the roll.

[0012] Optionally, an electric slip ring is provided on the other side of each of the rollers.

[0013] Optionally, the rolling component further includes a bearing housing, on which both sides of the roll are fixed.

[0014] Optionally, the coating mechanism further includes an adjustment component, which is disposed on the bearing housing and used to adjust the roller gap.

[0015] Optionally, the adjusting component includes a first wedge and a second wedge, one of the first wedge and the second wedge being connected to a bearing seat of one of the rolls, and the other of the first wedge and the second wedge being connected to a corresponding bearing seat of an adjacent roll. The first wedge and the second wedge are inclined and at least one of them is capable of moving in a first direction.

[0016] Optionally, the first direction is a vertical direction, and the top of the first wedge is higher than the top of the second wedge.

[0017] Optionally, at least one of the first cavity and the second cavity is a vacuum cavity.

[0018] Optionally, the winding component includes a tape-joining platform, a first tension roller, and a first correction roller. The first tension roller is used to adjust the tension of the winding, the first correction roller is used to correct the position of the material passing through, and the tape-joining platform is used to splice the material.

[0019] And / or, the unwinding component includes a second tension roller and a second correction roller, the second tension roller being used to adjust the unwinding tension and the second correction roller being used to correct the position of the material passing through.

[0020] Optionally, the coating mechanism further includes a doctor blade component, with one doctor blade component corresponding to each roller along the radial direction of the rollers, and the doctor blade components of two adjacent rollers located on different sides, one above the other.

[0021] Optionally, the coating mechanism further includes a cutting component located on the opposite side of the roller to the doctor blade component.

[0022] One technical advantage of this utility model is:

[0023] The dry coating equipment includes a housing, a mixing mechanism, and a coating mechanism. The housing has a first cavity and a second cavity. The mixing mechanism is located in the first cavity, and the coating mechanism is located in the second cavity. The coating mechanism includes a roller pressing component, which includes multiple rollers arranged side by side. A roller pressing gap is formed between two adjacent rollers. Along the axial direction of the rollers, a driving member is provided on one side of each roller, and the driving members of two adjacent rollers are located on different sides. The coating mechanism also includes a winding component, an unwinding component, and a hopper component. The winding component and the unwinding component are arranged perpendicular to the arrangement direction of the multiple rollers. The hopper component is located above the roller pressing component and can face the first roller pressing gap.

[0024] In this way, the mixing mechanism and the coating mechanism can be placed in different cavities of the housing. The housing can provide a dry, inert environment or a water-free and oxygen-free sealed environment required for the coating process to avoid contamination. It can also recover toxic gases generated during the coating process to prevent leaks that could harm human health and environmental safety. Furthermore, the rational layout of the roller pressing component, winding component, unwinding component, and hopper component can fully utilize the internal space of the second cavity, facilitating the miniaturization and integration of the coating mechanism.

[0025] Other features and advantages of the present invention will become clear from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. Attached Figure Description

[0026] The accompanying drawings, which form part of this specification, illustrate embodiments of the present invention and, together with the specification, serve to explain the principles of the present invention.

[0027] Figure 1 This is a front view of a dry coating apparatus according to an embodiment of the present invention;

[0028] Figure 2 This is a top view of a dry coating apparatus according to an embodiment of the present invention;

[0029] Figure 3 This is a top view of a coating mechanism according to an embodiment of the present utility model;

[0030] Figure 4 This is a cross-sectional view of a coating mechanism according to an embodiment of the present utility model;

[0031] Figure 5 This is a schematic diagram of a roller pressing component according to an embodiment of the present utility model;

[0032] Figure 6 This is a schematic diagram of an adjusting component according to an embodiment of the present utility model;

[0033] Figure 7 This is a schematic diagram of a winding component and an unwinding component according to an embodiment of the present utility model.

[0034] Explanation of reference numerals in the attached figures:

[0035] 1. Housing; 2. Mixing mechanism; 3. Coating mechanism; 31. Roller pressing component; 311. Roller; 312. Drive component; 313. Electric slip ring; 314. Bearing seat; 32. Adjusting component; 321. First wedge; 322. Second wedge; 33. Winding component; 331. Base; 332. Tape receiving platform; 333. First tension roller; 334. First correction roller; 34. Unwinding component; 341. Second tension roller; 342. Second correction roller; 35. Hopper component; 36. Scraper component; 37. Cutting component; 4. Oil cooling mechanism; 5. Hydraulic mechanism. Detailed Implementation

[0036] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the present invention.

[0037] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the invention or its application or use.

[0038] Technologies and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such technologies and equipment should be considered part of the specification.

[0039] In all the examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0040] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.

[0041] This invention provides a dry coating equipment, commonly used in battery production. By placing the mixing mechanism 2 and the coating mechanism 3 inside a vacuum chamber or a chamber filled with inert gas, the mixing and coating processes can be carried out in a vacuum or inert environment, thereby improving the coating quality.

[0042] like Figure 1 and Figure 2 As shown, the dry coating equipment provided by this utility model includes:

[0043] Box 1, wherein box 1 has a first cavity and a second cavity;

[0044] The mixing mechanism 2 is located in the first cavity, and the coating mechanism 3 is located in the second cavity.

[0045] The coating mechanism 3 includes a roller pressing component 31, which includes multiple rollers 311 arranged side by side. A roller pressing gap is formed between two adjacent rollers 311. Along the axial direction of the rollers 311, a driving member 312 is provided on one side of each roller 311, and the driving members 312 of two adjacent rollers 311 are located on different sides.

[0046] The coating mechanism 3 further includes a winding component 33, an unwinding component 34, and a hopper component 35. The winding component 33 and the unwinding component 34 are arranged along a direction perpendicular to the arrangement of the plurality of rollers 311. The hopper component 35 is located above the roller pressing component 31 and can face the first roller pressing gap.

[0047] like Figure 1 and Figure 2 As shown, chamber 1 is the main supporting structure of the entire equipment. It is either vacuum-sealed or filled with inert gas to maintain the stability of the internal working environment. Chamber 1 can provide the dry inert gas (such as argon or nitrogen) or an anhydrous and oxygen-free sealed environment required for the coating process to avoid contamination. It can also recover toxic gases generated during the coating process to prevent leaks that could harm human health and environmental safety. For example, chamber 1 can be a glove box or other vacuum chamber.

[0048] The housing 1 is divided into two independent spaces, namely the first chamber and the second chamber. These two chambers are used for the mixing process and the coating process, respectively, to ensure that the materials can be mixed and coated in a vacuum environment or an inert environment, thereby effectively preventing the generation of bubbles and improving the coating quality.

[0049] like Figure 1 As shown, the mixing mechanism 2 is disposed within the first cavity, and is used to uniformly mix the materials. The mixing mechanism 2 may include components such as a stirrer and a mixing container, and mixes the materials uniformly by rotation or stirring. Mixing in a vacuum or inert environment can further reduce the generation of bubbles and improve the mixing effect.

[0050] like Figure 1 As shown, the coating mechanism 3 is disposed within the second cavity, and is used to coat a uniformly mixed material onto a substrate, such as aluminum foil. Figures 3 to 5As shown, the coating mechanism 3 includes a roller pressing component 31, which includes multiple rollers 311 arranged side by side, for example, at least four rollers 311. The multiple rollers 311 are generally arranged in a horizontal direction to reduce their space occupation in the second cavity. A roller pressing gap is formed between two adjacent rollers 311, and the material can be squeezed by the pressure between the two adjacent rollers 311 when passing through the roller pressing gap.

[0051] By placing the mixing mechanism 2 and the coating mechanism 3 in different cavities, physical isolation between the material mixing and coating processes is achieved. This design not only simplifies the operation process but also ensures the independence of the mixing and coating environments, thereby improving the overall cleanliness and efficiency of the operation.

[0052] like Figure 3 and Figure 5 As shown, in the design of the roll forming component 31, each roll 311 is connected to a drive unit 312 on one axial side. The drive unit 312 can be a power device such as a motor or reducer, used to drive the roll 311 to rotate for roll forming. By placing the drive units 312 of two adjacent rolls 311 on different sides, that is, by arranging the drive units 312 alternately along the arrangement direction of the multiple rolls 311, interference between adjacent rolls 311 during rotation can be avoided, thereby ensuring the stability and uniformity of the coating process.

[0053] Furthermore, by setting the drive members 312 of two adjacent rolls 311 on different sides, it is possible to ensure that each roll 311 can rotate independently and stably, thereby achieving uniform rolling of the material. At the same time, it is also possible to avoid the problem of space occupation in the arrangement direction of the rolls 311 caused by the drive members 312 being arranged on the same side. This facilitates the reduction of the size of the rolling component 31, so as to facilitate the miniaturization and integration of the coating mechanism 3.

[0054] Furthermore, to further improve coating quality, a material supply device, namely a hopper component 35, can be installed at the inlet of the roller pressing component 31 to uniformly convey the evenly mixed material into the first roller gap. Simultaneously, a recycling device can be installed at the outlet of the roller pressing component 31 to convey the coated material to subsequent processing steps.

[0055] When using the dry coating equipment of this embodiment, the mixing mechanism 2 is first started to mix the materials. After uniform mixing, the materials are conveyed to the roller pressing component 31 of the coating mechanism 3. Then, the drive component 312 is started to drive the roller 311 to rotate, uniformly coating the materials onto the substrate. After coating is completed, the materials are conveyed to subsequent processes for further processing.

[0056] like Figure 4 and Figure 7As shown, the unwinding member 34 is used to unwind a substrate, such as aluminum foil, and the winding member 33 is used to wind up the coated material for use in subsequent processes. The winding member 33 and the unwinding member 34 are arranged perpendicular to the arrangement direction of the plurality of rolls 311, for example... Figure 4 The winding component 33 and the unwinding component 34 are arranged in a vertical direction to make full use of the internal space of the second cavity, which facilitates the reduction of the size of the roller pressing component 31, thereby facilitating the miniaturization and integration of the coating mechanism 3.

[0057] like Figure 4 As shown, the hopper component 35 is used to uniformly convey the evenly mixed material into the first roller gap. The hopper component 35 is positioned above the roller component 31, which on the one hand facilitates the material to enter the first roller gap conveniently, saving driving force; on the other hand, it can also make full use of the internal space of the second cavity, making it easier to reduce the size of the roller component 31, so as to facilitate the miniaturization and integration of the coating mechanism 3.

[0058] like Figure 1 and Figure 2 As shown, the dry coating equipment provided by this utility model also includes an oil cooling mechanism 4 and a hydraulic mechanism 5. The oil cooling mechanism 4 is used to provide the circulating cooling oil required for the operation of each mechanism, and the hydraulic mechanism 5 is used to drive the oil cylinder to provide the working pressure required for the roller 311 to roll.

[0059] Optionally, the drive unit 312 includes a motor and a reducer, the output end of the motor is connected to one side of the reducer, and the other side of the reducer is connected to the roll 311.

[0060] Specifically, the drive unit 312 may include a combination of a motor and a reducer to achieve precise control of the rotational speed of the roll 311. This not only ensures that the material is subjected to uniform pressure in the roll gap, but also further improves the thickness and uniformity of the coating. Moreover, since the motor speed is adjustable, the coating speed can be flexibly adjusted according to the substrate material and thickness to meet diverse coating requirements.

[0061] In addition, the reducer, as a transmission device between the motor and the roll 311, plays the role of reducing the speed and increasing the torque, making the roll 311 rotate more smoothly, reducing vibration and noise, and improving the overall stability of the dry coating equipment.

[0062] Optionally, each of the rolls 311 is provided with an electric slip ring 313 on the other side.

[0063] like Figure 3 and Figure 5As shown, each roll 311 has a drive member 312 on one side and an electric slip ring 313 on the other side, so that multiple rolls 311 can be driven independently by the drive member 312 and the electric slip ring 313, so as to ensure the rolling quality.

[0064] like Figure 3 and Figure 5 As shown, the driving components 312 of two adjacent rolls 311 are arranged on different sides, so that the electric slip rings 313 of two adjacent rolls 311 are also arranged on different sides. This can avoid the problem of space occupation in the arrangement direction of the rolls 311 caused by the driving components 312 being arranged on the same side, and facilitate the reduction of the size of the roll pressing component 31, so as to facilitate the miniaturization and integration of the coating mechanism 3.

[0065] The design of the slip ring 313 allows for stable signal transmission between the roll 311 and stationary components while the roll 311 rotates. The slip ring 313, integrated into the roll 311, facilitates easy signal and power transmission, significantly reducing maintenance costs and simplifying wiring. Furthermore, the slip ring 313 can monitor the roll 311's status in real time and take timely measures in case of malfunctions, thereby preventing damage to the dry coating equipment or production accidents, and improving the safety and reliability of the dry coating equipment.

[0066] Optionally, the rolling component 31 further includes a bearing housing 314, and both sides of the roll 311 are fixed to the bearing housing 314. Figure 5 As shown, a bearing seat 314 is provided on each side of each roll 311 to stably and reliably connect the roll 311 and provide rotation space for the roll 311.

[0067] Optionally, the coating mechanism 3 further includes an adjustment component 32, which is disposed on the bearing seat 314 and is used to adjust the roller gap.

[0068] In one embodiment, the adjusting component 32 may include a pair of cooperating wedges, one wedge located on a bearing seat 314 and the other wedge located on an adjacent bearing seat 314. The vertical movement of one wedge can drive the horizontal distance between the two adjacent bearing seats 314 to change, thereby realizing the adjustment of the roll gap, i.e., the roll gap.

[0069] In another embodiment, the adjusting component 32 may also include a linkage mechanism or a gear and rack mechanism composed of multiple linkages, which can drive the horizontal distance between two adjacent bearing seats 314 to change through structural design, thereby realizing the adjustment of the roll gap, i.e. the roll gap.

[0070] Optionally, the adjusting component 32 includes a first wedge 321 and a second wedge 322. One of the first wedge 321 and the second wedge 322 is connected to a bearing seat 314 of one of the rolls 311, and the other of the first wedge 321 and the second wedge 322 is connected to a corresponding bearing seat 314 of an adjacent roll 311. The first wedge 321 and the second wedge 322 are inclined and at least one of them is capable of moving in a first direction.

[0071] like Figure 6 As shown, when at least one of the first wedge 321 and the second wedge 322 moves along the first direction, the inclined surfaces of the two wedges engage to create a horizontal force component, thereby driving the bearing seat 314, which is equipped with the other wedge, to move horizontally and adjusting the roll gap, i.e., the roll slit. The first direction can be a vertical direction or a direction with a vertical force component.

[0072] Optionally, the first direction is a vertical direction, and the top of the first wedge 321 is higher than the top of the second wedge 322.

[0073] like Figure 6 As shown, a wedge base, a lead screw, a lead screw nut, and a drive unit can be provided. The drive unit is used to drive the lead screw nut to move up and down along the lead screw. The lead screw nut is connected to the first wedge 321 and drives the first wedge 321 to move up and down in the vertical direction. Thus, the bearing seat 314 with the second wedge 322 can be driven to move in the horizontal direction by the inclined surface between the two wedges, and the roller gap, i.e., the roller gap, can be adjusted.

[0074] The top of the first wedge 321 is set higher than the top of the second wedge 322, so that the two wedges have a difference in height, which can reduce the space occupied by the wedges on the bearing seat 314 and facilitate the miniaturization and integration of the coating mechanism 3.

[0075] Optionally, at least one of the first cavity and the second cavity is a vacuum cavity.

[0076] Specifically, the first cavity can be set as a vacuum cavity, the second cavity can be set as a vacuum cavity, or both the first cavity and the second cavity can be set as vacuum cavities, which can utilize the stability of the vacuum cavity to provide a relatively stable and reliable working environment.

[0077] Optionally, the winding component 33 includes a tape receiving platform 332, a first tension roller 333, and a first correction roller 334. The first tension roller 333 is used to adjust the tension of the winding, the first correction roller 334 is used to correct the position of the material passing through, and the tape receiving platform 332 is used to splice the material.

[0078] And / or, the unwinding component 34 includes a second tension roller 341 and a second correction roller 342, the second tension roller 341 being used to adjust the unwinding tension, and the second correction roller 342 being used to correct the position of the material passing through.

[0079] like Figure 7 As shown, the unwinding component 34 can be configured to include a second tension roller 341 and a second correction roller 342. The unwinding tension of the second tension roller 341 can be adjusted by its own weight and counterweight. The second correction roller 342 is used to correct the position of the unwound material to ensure unwinding reliability.

[0080] like Figure 7 As shown, the winding component 33 can also be configured to include a tape receiving platform 332, a first tension roller 333, and a first correction roller 334. The winding tension of the first tension roller 333 can be adjusted by its own weight and counterweight. The first correction roller 334 is used to correct the position of the winding material to ensure that the material is aligned and centered, thereby ensuring the reliability of winding, and finally splicing it with the previous material on the tape receiving platform 332.

[0081] Optionally, the coating mechanism 3 further includes a doctor blade component 36. Along the radial direction of the rollers 311, each roller 311 corresponds to one doctor blade component 36, and the doctor blade components 36 of two adjacent rollers 311 are located on different sides, one above the other.

[0082] like Figure 4 As shown, the scraper component 36 is used to scrape off foreign matter such as dust and water stains adhering to the corresponding roll 311 to ensure the cleanliness of the roll surface and thus avoid affecting the rolling effect of the roll 311. The scraper components 36 corresponding to two adjacent rolls 311 are located on different sides, for example, on... Figure 4 From left to right, the scraper components 36 are located below, above, below, above, and below in sequence. This arrangement of the scraper components 36 can achieve the cleaning effect of the scraper components 36 while reducing the space occupied in the arrangement direction of the rollers 311. This facilitates full utilization of the internal space of the second cavity, thereby reducing the size of the roller pressing component 31 and enabling the miniaturization and integration of the coating mechanism 3.

[0083] Optionally, the coating mechanism 3 further includes a cutting component 37, which is located on the opposite side of the roller 311 to the scraper component 36.

[0084] like Figure 4 As shown, it includes two cutting components 37, one of which is located on the bearing seat 314 of the second roll 311 and the other of which is located on the bearing seat 314 of the fourth roll 311, so as to be able to cut and trim the material between film formation and lamination.

[0085] Furthermore, the cutter component 37 is positioned on the opposite side of the roller 311 from the scraper component 36, so that the radial space of the roller 311 can be fully utilized, which facilitates the reduction of the size of the roller pressing component 31, thereby facilitating the miniaturization and integration of the coating mechanism 3.

[0086] The above embodiments mainly describe the differences between the various embodiments. As long as the different optimization features between the various embodiments are not contradictory, they can be combined to form a better embodiment. For the sake of brevity, they will not be elaborated here.

[0087] While specific embodiments of the present invention have been described in detail by way of examples, those skilled in the art should understand that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Those skilled in the art should understand that modifications can be made to the above embodiments without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A dry coating apparatus characterized by, The application relates to a box (1) comprising a first cavity and a second cavity, a mixing mechanism (2) arranged in the first cavity, and a coating mechanism (3) arranged in the second cavity. The coating mechanism (3) comprises a roller pressing component (31) comprising a plurality of rollers (311) arranged side by side, a roller pressing gap being formed between adjacent two rollers (311), and a driving member (312) being arranged on one side of each roller (311) in the axial direction of the roller (311), and the driving members (312) of adjacent two rollers (311) being arranged on different sides. The coating mechanism (3) further comprises a winding component (33) and a unwinding component (34) arranged in a direction perpendicular to the arrangement direction of the plurality of rollers (311), and a hopper component (35) arranged above the roller pressing component (31) and capable of moving towards the first roller pressing gap. The driving member (312) comprises a motor and a speed reducer, the output end of the motor is connected with one side of the speed reducer, and the other side of the speed reducer is connected with the roller (311). The other side of each roller (311) is provided with an electric slip ring (313).

2. The dry coating apparatus according to claim 1, characterized by The roller pressing component (31) further comprises a bearing seat (314), and both sides of the roller (311) are fixed on the bearing seat (314).

3. The dry coating apparatus according to claim 1, characterized by, The coating mechanism (3) further comprises an adjusting component (32) arranged on the bearing seat (314) and used for adjusting the roller pressing gap.

4. The dry coating apparatus according to claim 1, characterized by The adjusting component (32) comprises a first inclined iron (321) and a second inclined iron (322), one of the first inclined iron (321) and the second inclined iron (322) is connected to one bearing seat (314) of one roller (311), the other of the first inclined iron (321) and the second inclined iron (322) is connected to the corresponding bearing seat (314) of the adjacent roller (311), the first inclined iron (321) and the second inclined iron (322) are in inclined surface cooperation, and at least one of them is capable of moving in a first direction.

5. The dry coating apparatus according to claim 4, characterized by The first direction is a vertical direction, and the top of the first inclined iron (321) is higher than the top of the second inclined iron (322).

6. The dry coating apparatus according to claim 5, characterized by At least one of the first cavity and the second cavity is a vacuum cavity.

7. The dry coating apparatus according to claim 6, characterized by The winding component (33) comprises a belt receiving platform (332), a first tension roller (333) and a first deviation correcting roller (334), the first tension roller (333) is used for adjusting the tension of winding, the first deviation correcting roller (334) is used for correcting the position of the passing material, and the belt receiving platform (332) is used for splicing the material.

8. The dry coating apparatus according to any one of claims 1 to 7, characterized in that, And / or, the unwinding component (34) comprises a second tension roller (341) and a second deviation correcting roller (342), the second tension roller (341) is used for adjusting the tension of unwinding, and the second deviation correcting roller (342) is used for correcting the position of the passing material.

9. The dry coating apparatus according to any one of claims 1 to 7, characterized in that, ​ ​ 10. The dry coating apparatus according to any one of claims 1 to 7, characterized in that, The coating mechanism (3) further comprises a doctor blade component (36), each of the doctor blade components (36) corresponding to one of the rollers (311) and being located on a different side of the adjacent rollers (311) in the radial direction of the rollers (311).

11. The dry coating apparatus according to claim 10, characterized by The coating mechanism (3) further comprises a cutter component (37) located on the other side of the rollers (311) opposite to the doctor blade components (36).

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