Pole piece drying device and coating machine

Abstract

The utility model relates to the technical field of pole piece drying, and discloses a pole piece drying device and a coating machine, the pole piece drying device comprises a first folding mechanism, a second folding mechanism and a plurality of drying ovens; the first folding mechanism and the second folding mechanism are oppositely arranged on the two sides of the multiple drying ovens. In the drying oven, the pole piece sequentially passes through a first drying assembly, a second drying assembly and a third drying assembly, air outlet nozzles in the first drying assembly are densely-arranged mesh air nozzles, air outlet nozzles in the second drying assembly are wing-shaped air nozzles, and air outlet nozzles in the third drying assembly are outer eight air nozzles. The air outlet nozzles are correspondingly arranged, so that graded drying is effectively carried out according to different states and wet film positions in the wet film drying process, and the drying requirement is met. And the steering mechanism is arranged outside, so that a passing roller is prevented from being mounted in the drying oven, the drying space of the pole piece is ensured, and the steering mechanism arranged outside the drying oven is easy to disassemble and maintain. In this way, the practicability of the pole piece drying device is effectively improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of pole piece drying, and particularly relates to a pole piece drying device and a coater. Background Art

[0002] During the manufacturing process of lithium battery pole pieces, corresponding electrode materials need to be coated on the pole pieces, and after the coating is completed, the pole pieces need to be transported into an oven to be dried by hot air in the oven.

[0003] In the prior art, a multi-layer oven can be used to dry the pole pieces, and there are three drying channels in the oven. When the pole pieces need to be dried, the pole pieces flow into the first drying channel, and then, the pole pieces turn and flow into the second drying channel, and then turn again and flow into the third drying channel, so as to perform step-by-step drying. After the drying is completed, the pole pieces flow out of the oven.

[0004] Among them, the air outlets for discharging hot air in the drying channels are usually set to be unified. In this way, it cannot well adapt to the drying requirements of pole pieces in different states; and currently, the turning of the pole pieces is usually carried out by arranging deflector rolls inside the oven, but the deflector rolls will occupy the drying space inside the oven, which may affect the drying effect of the pole pieces, and because the deflector rolls are installed inside the oven, their disassembly and maintenance are relatively troublesome. In this way, the practicability is relatively low. Summary of the Utility Model

[0005] In order to solve the deficiencies of the above-mentioned prior art, the utility model provides a pole piece drying device and a coater.

[0006] The technical effects to be achieved by the utility model are realized through the following technical aspects:

[0007] In a first aspect, a pole piece drying device is provided, including: a first folding mechanism for performing the first turn of the pole piece, a second folding mechanism for performing the second turn of the pole piece, and a plurality of ovens;

[0008] The first folding mechanism and the second folding mechanism are oppositely arranged on both sides of the plurality of ovens to cooperate with the two turns of the pole piece;

[0009] A first drying component, a second drying component, and a third drying component are arranged in each oven. The pole piece sequentially passes through the first drying component, the second drying component, and the third drying component. The air outlets in the first drying component are set as closely arranged mesh nozzles, the air outlets in the second drying component are set as wing-shaped nozzles, and the air outlets in the third drying component are set as outwardly flared nozzles.

[0010] In some embodiments, a heat insulation plate is provided between each of the first drying assemblies and one of the second drying assemblies. The air outlet directions of each of the first drying assemblies and one of the second drying assemblies are both set towards the heat insulation plate, so that a first drying channel is formed between each of the first drying assemblies and one side of the heat insulation plate, and a second drying channel is formed between each of the second drying assemblies and the other side of the heat insulation plate. The third drying assemblies are arranged with air outlet directions opposite to those of the second drying assemblies, and a third drying channel is formed between each of the third drying assemblies and the inner wall of each oven.

[0011] The working end of the first folding mechanism is arranged on one side of the first drying channel and the second drying channel, and the working end of the second folding mechanism is arranged on one side of the second drying channel and the third drying channel.

[0012] In some embodiments, the first folding mechanism includes a frame, a vacuum adsorption roller, a tension detection roller, and an integrated transition roller. The frame is arranged on one side of several ovens. Along the conveying direction of the pole piece: the integrated transition roller, the tension detection roller, and the vacuum adsorption roller are arranged on the frame in sequence, and the integrated transition roller and the tension detection roller are arranged side by side, and the vacuum adsorption roller is arranged on one side of the tension detection roller.

[0013] In some embodiments, the second folding mechanism includes a frame, two air floating rollers, a vacuum adsorption roller, a flattening roller, a pressing roller, and an integrated transition roller. Along the conveying direction of the pole piece: one air floating roller, the flattening roller, the vacuum adsorption roller, the pressing roller, the other air floating roller, and the integrated transition roller are arranged on the frame, and one air floating roller is arranged at one end of the frame, the vacuum adsorption roller and the pressing roller are arranged opposite to each other, and the integrated transition roller and the other air floating roller are arranged at the other end of the frame.

[0014] In some embodiments, a deviation correction frame for correcting the pole piece is further arranged on the frame.

[0015] In some embodiments, a cover body is arranged on the frame. The cover body covers the deviation correction frame. The cover body is connected with an exhaust fan and a blower, and the wind force of the blower is greater than that of the exhaust fan.

[0016] In some embodiments, the number of the ovens is set to be at least two.

[0017] In some embodiments, the first drying assembly, the second drying assembly, and the third drying assembly respectively include a return air structure, and the return air nozzles of each return air structure are set as V-shaped air nozzles.

[0018] In some embodiments, it further includes a platform. The first folding mechanism, the second folding mechanism and several drying boxes form a drying mechanism group. Two drying mechanism groups are provided. One drying mechanism group is arranged below the platform, and the other drying mechanism group is arranged on the platform.

[0019] In a second aspect, a coating machine is provided, including the pole piece drying device according to any one of the above embodiments.

[0020] To sum up, the present utility model has at least the following beneficial effects:

[0021] A pole piece drying device provided by the present utility model, by respectively corresponding the air outlet nozzles, that is, the air outlet nozzles in the first drying assembly are set as closely arranged mesh nozzles, the air outlet nozzles in the second drying assembly are set as airfoil nozzles, and the air outlet nozzles in the third drying assembly are set as outward eight nozzles, so that the pole piece can be uniformly dried first and then dried with high precision, and finally dried quickly and over a large area, thereby effectively performing hierarchical drying on different states and positions of the wet film during the drying process, making the drying effect of the pole piece better and fully meeting the drying requirements. And by arranging a first folding mechanism and a second folding mechanism on both sides of several drying boxes, the pole piece can be folded twice by the first folding mechanism and the second folding mechanism arranged outside the drying box. Since the turning mechanism is arranged outside, the installation of over rollers inside the drying box is avoided, ensuring the drying space of the pole piece, and the turning mechanism arranged outside the drying box is easy to disassemble and repair. In this way, the practicability of the pole piece drying device is effectively increased. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the single-layer pole piece drying device according to the embodiment of the present application;

[0023] Figure 2 It is a schematic cross-sectional structure diagram of the first folding mechanism and the second folding mechanism of the single-layer pole piece drying device according to the embodiment of the present application;

[0024] Figure 3 It is a schematic cross-sectional structure diagram of the drying box of the single-layer pole piece drying device according to the embodiment of the present application;

[0025] Figure 4 It is a schematic diagram of the overall structure of the coating machine according to the embodiment of the present application.

[0026] Markings in the figure:

[0027] 10. Polar plate drying device; 20. Coater; 100. Oven; 110. First drying component; 120. Second drying component; 130. Third drying component; 140. Heat insulation plate; 150. Return air nozzle; 160. First over-roller group; 170. Second over-roller group; 180. Third over-roller group; 200. First folding mechanism; 300. Second folding mechanism; 400. Frame; 410. Integral over-roller; 420. Tension detection roller; 430. Vacuum adsorption roller; 440. Air floating roller; 450. Press roller; 460. Flattening roller; 470. Deviation rectifying frame; 480. Thread flattening roller; 500. Platform. Detailed implementation manners

[0028] To make the purposes, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. The described embodiments are some, but not all, of the embodiments of the present utility model.

[0029] Therefore, the following detailed description of the embodiments of the present utility model provided in the drawings is not intended to limit the scope of the claimed present utility model, but merely represents the selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts fall within the scope of protection of the present utility model.

[0030] In the following embodiments, with reference to Figure 1 the coordinate system shown, the direction indicated by the arrow of the Y axis is to the right, and the direction indicated by the arrow of the Z axis is upward.

[0031] Embodiment 1:

[0032] As Figures 1 to 3 shown, in this embodiment, a polar plate drying device 10 includes: a first folding mechanism 200 for making the first turn of the polar plate, a second folding mechanism 300 for making the second turn of the polar plate, and a plurality of ovens 100; the first folding mechanism 200 and the second folding mechanism 300 are oppositely arranged on both sides of the plurality of ovens 100 to cooperate with the two turns of the polar plate; each oven 100 is provided with a first drying component 110, a second drying component 120 and a third drying component 130, the polar plate sequentially passes through the first drying component 110, the second drying component 120 and the third drying component 130, the air outlet nozzles in the first drying component 110 are set as closely arranged mesh nozzles, the air outlet nozzles in the second drying component 120 are set as airfoil nozzles, and the air outlet nozzles in the third drying component 130 are set as outward eight-shaped nozzles.

[0033] Specifically, the first side of the pole piece is coated with slurry. The number of the ovens 100 is optional but not limited to four, and can also be set to one, five, three, etc. A first folding mechanism 200 is arranged on the right side of the four ovens 100, and a second folding mechanism 300 is arranged on the left side of the four ovens 100. The first folding mechanism 200 is used to make the first turn of the pole piece, and the second folding mechanism 300 is used to make the second turn of the pole piece, so that the pole piece can pass through each oven 100 three times under the turning action of the first folding mechanism 200 and the second folding mechanism 300. Inside each oven 100, a first drying component 110, a second drying component 120 and a third drying component 130 are arranged in sequence from top to bottom. The first drying component 110, the second drying component 120 and the third drying component 130 respectively include a plurality of air outlets and other conventional components required for drying. Other conventional components are known to those skilled in the art and will not be described in detail in this embodiment. Among them, the close-packed mesh air nozzle is composed of a plurality of small mesh holes, and these mesh holes are evenly distributed to form a dense air outlet surface. Due to the density of the mesh holes, the close-packed mesh air nozzle can provide a more uniform air flow distribution, reduce air flow dead corners, and improve the drying efficiency, so as to initially and evenly dry the incoming pole piece. At this time, the pole piece is in a preliminary drying state. The airfoil air nozzle has a specific streamlined profile, can utilize the principle of fluid mechanics to optimize the air flow path, reduce air flow resistance and turbulence phenomenon, accurately control the air flow, improve the drying efficiency and quality, so as to dry the preliminarily dried pole piece with high precision and high efficiency. At this time, the pole piece is almost in a dried state. The outer eight air nozzle means that the air outlet is in an outer eight shape, which can expand the coverage range of the air flow, can generate a wider air flow distribution, and can dry a large area to quickly dry the undried part of the pole piece at last. Thus, the pole piece is dried step by step, and then the first side of the pole piece can be dried better.

[0034] It should be noted that by correspondingly arranging the air outlets, that is, each air outlet in the first drying component 110 is set as a close-packed mesh air nozzle, each air outlet in the second drying component 120 is set as an airfoil air nozzle, and each air outlet in the third drying component 130 is set as an outer eight air nozzle, the pole piece can be evenly dried first and then dried with high precision, and finally quickly dried over a large area. Furthermore, it can effectively perform hierarchical drying according to different states and positions of the wet film during the drying process, making the drying effect of the pole piece better to fully meet the drying requirements. And by arranging a first folding mechanism 200 and a second folding mechanism 300 on both sides of several ovens 100, the pole piece can be turned twice by the first folding mechanism 200 and the second folding mechanism 300 arranged outside the oven 100. Because the turning mechanism is arranged outside, it is avoided to install guide rollers inside the oven 100, ensuring the drying space of the pole piece, and the turning mechanism arranged outside the oven 100 is easy to disassemble and repair. In this way, the practicability of the pole piece drying device 10 is effectively increased.

[0035] To facilitate the drying of the electrode sheets, as Figure 1 and Figure 2 shown, in some embodiments, a heat insulation plate 140 is provided between each first drying assembly 110 and a second drying assembly 120. The air outlet directions of each first drying assembly 110 and a second drying assembly 120 are both set to face the heat insulation plate 140, so that a first drying channel is formed between each first drying assembly 110 and one side of each heat insulation plate 140, and a second drying channel is formed between each second drying assembly 120 and the other side of each heat insulation plate 140. The third drying assembly 130 is arranged with an air outlet direction opposite to that of the second drying assembly 120, and a third drying channel is formed between each third drying assembly 130 and the inner wall of each oven 100; the working end of a first folding mechanism 200 is arranged on one side of the first drying channel and the second drying channel, and the working end of a second folding mechanism 300 is arranged on one side of the second drying channel and the third drying channel.

[0036] Specifically, the air outlet directions of the first drying assembly 110 and the second drying assembly 120 are set to face the direction of the heat insulation plate 140, that is, each dense row of mesh nozzles and each airfoil nozzle are arranged close to the heat insulation plate 140; a first over-roller group 160 is arranged between the top surface of the first drying assembly 110 and the heat insulation plate 140. The first over-roller group 160 includes a plurality of over-rollers to convey the electrode sheets for drying. A second over-roller group 170 is arranged between the bottom surface of the second drying assembly 120 and the heat insulation plate 140. The second over-roller group 170 includes a plurality of over-rollers to convey the electrode sheets for drying. The air outlet direction of the third drying assembly 130 is set to be away from the heat insulation plate 140, that is, each outwardly splayed nozzle is arranged away from the heat insulation plate 140. A third over-roller group 180 is arranged between the third drying assembly 130 and the inner wall of the oven 100. The third over-roller group 180 includes a plurality of over-rollers to convey the electrode sheets for drying. In this way, the first drying assembly 110, the first over-roller group 160, the heat insulation plate 140, the second over-roller group 170, the second drying assembly 120, the third drying assembly 130, and the third over-roller group 180 are sequentially arranged in the oven 100 from top to bottom. In this way, the electrode sheets in the first drying channel and the third drying channel have the wet film facing up, and the electrode sheets in the third drying channel have the wet film facing down, making the setting of the air outlet nozzles more adaptable to the suspended state of the electrode sheets. Among them, the second drying assembly 120 and the third drying assembly 130 are separated by the inner wall of the box body to prevent the hot air from affecting each other.

[0037] In another embodiment, the first drying assembly 110, the first over-roller group 160, the heat insulation plate 140, the second over-roller group 170, the second drying assembly 120, the third drying assembly 130, and the third over-roller group 180 can be sequentially arranged in the oven 100 from bottom to top. And the working end of the first folding mechanism 200 and the working end of the second folding mechanism 300 are arranged in corresponding cooperation.

[0038] Moreover, the first drying assembly 110, the first over-roller group 160, the heat insulation plate 140, the second over-roller group 170, the second drying assembly 120, the third drying assembly 130, and the third over-roller group 180 can also be arranged in other layouts, as long as the whole can gradually dry one side of the pole piece, and the working end of the first folding mechanism 200 and the working end of the second folding mechanism 300 are correspondingly arranged in cooperation with it.

[0039] Embodiment 2

[0040] This embodiment is a further implementation manner of Embodiment 1. As Figure 1 and Figure 3 shown, in this embodiment, the first folding mechanism 200 includes a frame 400, a vacuum adsorption roller 430, a tension detection roller 420, and an integrated over-roller 410. The frame 400 is arranged on one side of several ovens 100. Along the conveying direction of the pole piece: the integrated over-roller 410, the tension detection roller 420, and the vacuum adsorption roller 430 are sequentially arranged on the frame 400, and the integrated over-roller 410 and the tension detection roller 420 are arranged side by side, and the vacuum adsorption roller 430 is arranged on one side of the tension detection roller 420.

[0041] Specifically, the first folding mechanism 200 is arranged on the right side of the first drying channel, the second drying channel, and the third drying channel. Referring to Figure 3 the right-side structure, the integrated over-roller 410, the tension detection roller 420, and the vacuum adsorption roller 430 are in contact with the flowing-out pole piece and in contact with the second side of the pole piece. The integrated over-roller 410 and the tension detection roller 420 are arranged side by side at the top of the frame 400 and are correspondingly arranged with the pole piece, that is, the top surface of the integrated over-roller 410 is almost flush with the top surface of the first over-roller group 160 to smoothly transport the pole piece out of the first drying channel, thereby effectively avoiding cracks in the pole piece film layer. The vacuum adsorption roller 430 is arranged at the lower right side of the tension detection roller 420, and the bottom surface of the vacuum adsorption roller 430 is almost flush with the bottom surface of the second over-roller group 170 to smoothly flow the pole piece into the second drying channel, thereby further avoiding the generation of cracks. And a deviation correction frame 470 is arranged below the vacuum adsorption roller 430 to correct the pole piece. When in use, after the pole piece flows out of the first drying channel, it flows to the integrated over-roller 410, and the integrated over-roller 410 supports the pole piece, then flows to the tension detection roller 420, which detects the tension of the pole piece, and finally flows to the vacuum adsorption roller 430. The vacuum adsorption roller 430 is the main driving roller. The pole piece is adsorbed on the roller by pumping vacuum with a special vacuum pump to keep the tension constant and play a role in tension isolation. And the adsorption force can be adjusted by adjusting the frequency of the vacuum pump, so as to adjust the tension of the pole piece. After that, it flows above the deviation correction frame 470, and the deviation correction frame 470 can correct the deviation in time, and finally flows into the second drying channel, and the pole piece completes the first turn.

[0042] For the convenience of using the second folding mechanism 300, asFigure 1 and Figure 3 As shown in Figure 3 , in some embodiments, the double-fold mechanism 300 includes a frame 400, two air-floating rollers 440, a vacuum adsorption roller 430, a flattening roller 460, a pressing roller 450, and an integrated transition roller 410. Along the conveying direction of the pole piece: one air-floating roller 440, a flattening roller 460, a vacuum adsorption roller 430, a pressing roller 450, the other air-floating roller 440, and the integrated transition roller 410 are arranged on the frame 400. One air-floating roller 440 is arranged at one end of the frame 400. The vacuum adsorption roller 430 and the pressing roller 450 are arranged opposite to each other. The integrated transition roller 410 and the other air-floating roller 440 are arranged at the other end of the frame 400.

[0043] Specifically, the double-fold mechanism 300 is arranged on the left side of the first drying channel, the second drying channel, and the third drying channel. Referring to the left-side structure in Figure 3 , two threaded flattening rollers 480 for introducing the pole piece are arranged at the top of the frame 400. The threaded flattening rollers 480 increase the friction force through threads. The top surfaces of the two threaded flattening rollers 480 are correspondingly arranged with the top surface of the first transition roller group 160 to gently convey the pole piece into the first drying channel for drying by conveying the second side of the pole piece. A tension transition roller is arranged on the right side of one air-floating roller 440. The tension transition roller and one air-floating roller 440 are arranged below the threaded flattening rollers 480. This air-floating roller is arranged at the upper end of the frame. The pole piece flowing out of the second drying channel flows to the upper air-floating roller 440 through the tension transition roller. The second side of the pole piece bypasses the bottom surface of the tension transition roller to the top surface of the air-floating roller 440, so that the first side of the pole piece is wound around the air-floating roller 440. The air-floating roller 440 generates an air-floating effect through a high-pressure blower to make the first side of the pole piece suspended. The deviation rectifying frame 470 is arranged below the upper air-floating roller 440 to perform deviation rectification on the pole piece. The flattening roller 460 is arranged in the middle of the frame 400 to flatten the pole piece and prevent the pole piece from wrinkling. The vacuum adsorption roller 430 and the pressing roller 450 are arranged opposite to each other. Among them, the pressing roller 450 is set as a rubber pressing roller 450. The vacuum adsorption roller 430 contacts the second side of the pole piece. The vacuum adsorption roller 430 adjusts the angle of the pole piece through a special vacuum pump to increase the tension of the pole piece. The other air-floating roller 440 is arranged at the lower left of the vacuum adsorption roller 430 to make the first side of the pole piece suspended while the pole piece turns around this air-floating roller 440 to avoid soiling the first side of the pole piece. The integrated transition roller 410 is arranged at the bottom end of the frame 400 and bears the second side of the pole piece to flow the pole piece into the third drying channel for drying. When in use, after the pole piece flows out of the second drying channel, it passes through the tension transition roller and flows to one air-floating roller 440, then passes through the deviation rectifying frame 470, and the deviation rectifying frame 470 can perform deviation rectification on it. Then it flows to the flattening roller 460 for flattening. The vacuum adsorption roller 430 and the pressing roller 450 are used in cooperation to increase the tension. Then it completes the turning through the other air-floating roller 440. Finally, it flows into the third drying channel through the two integrated transition rollers 410 to complete the second turning.​​

[0044] For facilitating the return air, as Figure 2 shown, in some embodiments, the first drying component 110, the second drying component 120 and the third drying component 130 respectively include a return air structure, and the air return nozzles 150 of each return air structure are set as V-shaped air nozzles.

[0045] Specifically, the V-shaped design of the air return nozzle 150 can reduce the cross interference between the incoming air and the return air, quickly guide the water vapor to the return air system, reduce the retention of water vapor, and reduce the dead corners of the air flow and the dust accumulation area, simplify the structure, and be easier to clean.

[0046] Embodiment 3

[0047] This embodiment is a further implementation manner of Embodiment 1 or 2. As Figure 3 shown, in this embodiment, a cover body is provided on the rack 400, the cover body covers the deviation rectifying frame 470, the cover body is connected with an exhaust fan and a blower, and the wind force of the blower is greater than that of the exhaust fan.

[0048] Specifically, the exhaust fan is used for continuously exhausting air to the return air channel. The blower is used for continuously blowing the cover body. The cover body can increase the sealing performance of the deviation rectifying frame 470 to separate it from the outside. Among them, in the one-fold mechanism 200, the cover body completely covers the integral over-roller 410, the tension detection roller 420, the vacuum adsorption roller 430 and the deviation rectifying frame 470; in the two-fold mechanism 300, the cover body completely covers the air flotation roller 440 at the upper end and the deviation rectifying frame 470. Through the action of the exhaust fan and the blower, when the blowing is greater than the exhaust, a negative pressure is formed inside the cover body, and the exhaust fan is connected to the return air duct, so that the internal gas can be recovered to prevent the leakage of NMP. And it can protect the internal transmission structure and maintain the stability of the pole piece at the same time.

[0049] Embodiment 4

[0050] This embodiment is a further implementation manner of Embodiment 1, 2 or 3. As Figure 4 shown, in this embodiment, the pole piece drying device 10 further includes a platform 500. The one-fold mechanism 200, the two-fold mechanism 300 and a plurality of drying ovens 100 form a drying mechanism group. Two drying mechanism groups are provided. One drying mechanism group is arranged below the platform 500, and the other drying mechanism group is arranged on the platform 500.

[0051] Specifically, a drying mechanism group is installed below the platform 500, and another drying mechanism group is installed above the platform 500. In this way, the first side of the pole piece can be dried by the drying mechanism group arranged below the platform 500, and the second side of the pole piece can be dried by the drying mechanism group arranged above the platform 500. Thus, both sides of the pole piece can be dried, with a smaller floor area while ensuring the complete drying of the pole piece. Moreover, the folding mechanism 200 of the two drying mechanism groups is arranged in the reverse direction, and the second folding mechanism 300 is also arranged in the reverse direction. Among them, the pole piece is conveyed between the upper and lower drying mechanism groups through conventional mechanisms such as a traction mechanism and a climbing mechanism. Each conventional mechanism is known to those skilled in the art and can be implemented, and will not be described in detail in this embodiment.

[0052] Embodiment 5

[0053] As Figure 4 shown, a coating machine 20 is provided, including the pole piece drying device 10 of Embodiment 1, 2, 3 or 4.

[0054] Specifically, through the combined use of the conventional device used in coating and the pole piece drying device 10, the coating process is completed. It can be understood that the conventional devices in the coating machine 20 may include a first-side head, a second-side head, a winding mechanism, a unwinding mechanism, etc. Among them, each conventional device and the way of the combined use of each conventional device and the pole piece drying device 10 are known to those skilled in the art and can be implemented, and will not be described in detail in this embodiment.

[0055] Among them, standard parts selected in this application, such as the deviation rectifying frame 470, etc., all adopt explosion-proof models to prevent accidents.

[0056] In the present invention, unless otherwise clearly defined and limited, terms such as "installation", "connection", "connection", "fixation" and other terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and can be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0057] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is customarily placed during use. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, terms such as "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0058] In addition, terms such as "horizontal", "vertical", "overhanging", etc. do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0059] In the present utility model, unless otherwise clearly specified and defined, the first feature being above or below the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through additional features therebetween. Moreover, the first feature being above, over and on top of the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature has a higher horizontal height than the second feature. The first feature being below, under and beneath the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the first feature has a lower horizontal height than the second feature.

[0060] Although the description of the present utility model is made in conjunction with the above specific embodiments, it is obvious that those skilled in the art can make many substitutions, modifications and variations based on the above content. Therefore, all such substitutions, improvements and variations are included within the spirit and scope of the appended claims.

Claims

1. A pole piece drying device, characterized in that: include: A first folding mechanism (200) for performing a first folding on the pole piece, a second folding mechanism (300) for performing a second folding on the pole piece, and a plurality of ovens (100); The first folding mechanism (200) and the second folding mechanism (300) are arranged relatively on two sides of a plurality of the ovens (100) to match the two turns of the pole piece; Each of the drying ovens (100) is provided with a first drying component (110), a second drying component (120) and a third drying component (130), and the electrode passes through the first drying component (110), the second drying component (120) and the third drying component (130) in sequence, the air outlet nozzle in the first drying component (110) is set as a close-packed mesh air nozzle, the air outlet nozzle in the second drying component (120) is set as an airfoil air nozzle, and the air outlet nozzle in the third drying component (130) is set as an outer eight air nozzle.

2. The electrode drying device according to claim 1, characterized in that: A temperature insulation plate (140) is arranged between each of the first drying components (110) and each of the second drying components (120); the air outlet directions of each of the first drying components (110) and each of the second drying components (120) are arranged toward the temperature insulation plate (140), so that each of the first drying components (110) and one side of each of the temperature insulation plates (140) form a first drying channel, and each of the second drying components (120) and the other side of each of the temperature insulation plates (140) form a second drying channel; the air outlet directions of the third drying components (130) and the second drying components (120) are arranged opposite to each other, and each of the third drying components (130) and the inner wall of each of the ovens (100) form a third drying channel; The working end of the first folding mechanism (200) is arranged on one side of the first drying channel and the second drying channel, and the working end of the second folding mechanism (300) is arranged on one side of the second drying channel and the third drying channel.

3. The electrode drying device according to claim 1, characterized in that: The folding mechanism (200) comprises a frame (400), a vacuum adsorption roller (430), a tension detection roller (420) and an integrated roller (410). The frame (400) is arranged on one side of a plurality of the ovens (100). Along the conveying direction of the electrode sheet, the integrated roller (410), the tension detection roller (420) and the vacuum adsorption roller (430) are arranged on the frame (400) in sequence, and the integrated roller (410) and the tension detection roller (420) are arranged side by side. The vacuum adsorption roller (430) is arranged on one side of the tension detection roller (420).

4. The electrode drying device according to claim 1, characterized in that: The two-folding mechanism (300) comprises a frame (400), two air-floating rollers (440), a vacuum adsorption roller (430), a flattening roller (460), a pressure roller (450) and an integrated passing roller (410), and along the conveying direction of the electrode sheet: one of the air-floating rollers (440), the flattening roller (460), the vacuum adsorption roller (430), the pressure roller (450), another of the air-floating rollers (440) and the integrated passing roller (410) are arranged on the frame (400), and one of the air-floating rollers (440) is arranged at one end of the frame (400), the vacuum adsorption roller (430) and the pressure roller (450) are arranged opposite to each other, and the integrated passing roller (410) and another of the air-floating rollers (440) are arranged at the other end of the frame (400).

5. The electrode drying device according to claim 3 or 4, characterized in that: The frame (400) is also provided with a deviation correction frame (470) for correcting the pole piece.

6. The electrode drying device according to claim 5, characterized in that: The frame (400) is provided with a cover body, the cover body is covered on the deviation correction frame (470), the cover body is connected to an exhaust fan and a blower, and the wind force of the blower is greater than the wind force of the exhaust fan.

7. The electrode drying device according to claim 1, characterized in that: The number of the ovens (100) is set to be at least two.

8. The electrode drying device according to claim 1, characterized in that: The first drying component (110), the second drying component (120) and the third drying component (130) respectively comprise a return air structure, and the return air nozzle (150) of each return air structure is configured as a V-shaped nozzle.

9. The electrode drying device according to any one of claims 1, 2, 3, 4, 7 or 8, characterized in that: It also includes a platform (500), wherein the first folding mechanism (200), the second folding mechanism (300) and a plurality of drying boxes (100) form a drying mechanism group, wherein the drying mechanism group is provided in two, one drying mechanism group is provided below the platform (500), and the other drying mechanism group is provided on the platform (500).

10. A coating machine, characterized in that: It comprises the electrode drying device (10) as claimed in claim 9.

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