Laser drying oven and coating machine

Abstract

The utility model relates to the technical field of drying ovens, and discloses a laser drying oven and a coating machine, the laser drying oven comprises an oven body, an upper laser drying assembly and a lower laser drying assembly; the upper laser drying assembly and the lower laser drying assembly are installed in the box body, and a pole piece drying channel is arranged between the upper laser drying assembly and the lower laser drying assembly so as to conduct laser drying on the two faces of a pole piece flowing into the box body. In this way, electric energy can be directly converted into laser to cover a wet film irradiating the pole piece, so that the energy conversion utilization rate can be greatly improved, and the purpose of quick drying is achieved; therefore, wet films on the front side and the back side of the pole piece can be heated and dried at the same time, the drying speed of the pole piece is higher, the running speed of equipment is higher, and the output rate of the lithium battery pole piece is effectively increased.

Description

Technical Field

[0001] The utility model belongs to the technical field of ovens, and particularly relates to a laser drying oven and a coater. Background Art

[0002] In the production process of lithium battery electrodes, in the front intaglio coating process, it is necessary to dry the coated wet film through an oven to produce dry electrodes.

[0003] Currently, the existing ovens often use hot air convection drying technology to dry the electrodes. Also, due to the process production capacity requirements, the operating speed of the equipment needs to match the drying speed of the oven. However, the drying speed of hot air convection drying is relatively slow, and usually only the single-sided wet film is dried. Therefore, the time required for the electrodes to be completely dried is relatively long, the operating speed of the equipment is slow, and the production rate of lithium battery electrodes is slow. Content of the Utility Model

[0004] In order to solve the deficiencies of the above-mentioned existing technology, the utility model provides a laser drying oven and a coater.

[0005] The technical effects to be achieved by the utility model are realized through the following technical aspects:

[0006] In a first aspect, the utility model provides a laser drying oven, including: a box body, an upper laser drying assembly, and a lower laser drying assembly;

[0007] The upper laser drying assembly and the lower laser drying assembly are installed in the box body, and a pole piece drying channel is arranged between the upper laser drying assembly and the lower laser drying assembly to perform laser drying on both sides of the pole piece flowing into the box body.

[0008] In some embodiments, optical elements are arranged between the upper laser drying assembly and the pole piece drying channel, and between the lower laser drying assembly and the pole piece drying channel to separate the pole piece drying channel.

[0009] In some embodiments, both the upper laser drying assembly and the lower laser drying assembly include a plurality of laser emitters, and the laser emitters in the upper laser drying assembly and the laser emitters in the lower laser drying assembly are arranged staggeredly.

[0010] In some embodiments, a cooling assembly is further included, and the cooling assembly contacts and cools the laser emitter through a pipeline.

[0011] In some embodiments, the box body is connected with an air inlet assembly that generates a transverse laminar flow in the pole piece drying channel through ventilation.

[0012] In some embodiments, the box body is connected with a return air assembly that recovers the hot air in the pole piece drying channel to the air inlet assembly.

[0013] In some embodiments, conveying rollers for conveying the pole pieces are respectively arranged on the inlet side and the outlet side of the box body.

[0014] In some embodiments, a sensor for monitoring the temperature of the surface of the pole piece is arranged inside the box body.

[0015] In some embodiments, an observation window for observing the inside of the box body is embedded on the box body.

[0016] In a second aspect, the present utility model provides a coating machine, including the laser drying oven according to any one of the above embodiments.

[0017] To sum up, the present utility model has at least the following advantages:

[0018] A laser drying oven provided by the present utility model is provided with an upper laser drying assembly and a lower laser drying assembly inside the box body, so that the conventional hot air convection drying can be replaced by laser drying. By directly converting electric energy into laser form to cover and irradiate the wet film of the pole piece, the energy conversion utilization rate can be greatly improved, so as to achieve the purpose of rapid drying; and by arranging laser drying structures on both the front and back sides of the pole piece in a single-section oven, the wet films on both the front and back sides of the pole piece can be heated and dried simultaneously. That is, through the high-energy drying of the laser and the simultaneous drying of the wet films on both sides of the pole piece, the overlong drying time caused by hot air convection drying and single-sided wet film drying in the oven can be effectively avoided, so that the drying speed of the pole piece is faster and the operation speed of the equipment is faster, thereby effectively improving the output rate of the lithium battery pole piece. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the laser drying oven according to an embodiment of the present application in one direction;

[0020] Figure 2 It is a schematic diagram of the overall structure of the laser drying oven according to an embodiment of the present application in another direction;

[0021] [[ID=3l]] Figure 3 It is a schematic diagram of the sectional structure of the box body according to an embodiment of the present application;

[0022] Figure 4 It is a schematic diagram of the partial sectional structure of the laser drying oven according to an embodiment of the present application;

[0023] Figure 5 It is a schematic diagram of the structure of the laser emitter according to an embodiment of the present application.

[0024] Markings in the figure:

[0025] 10. Laser drying oven; 100. Box body; 110. Upper laser drying component; 120. Lower laser drying component; 130. Electrode drying channel; 140. Optical element; 150. Installation box; 151. Over-roller; 160. Sensor; 170. Observation window; 200. Laser generator; 210. Cooling component; 220. Laser emitter; 300. Side air inlet box; 310. Air inlet cavity; 320. Fresh air pipe; 400. Circulation fan; 500. Circulation box; 510. Circulation cavity; 520. Circulation filter; 600. Side air return box; 610. Air return cavity; 700. Exhaust fan. Detailed implementation manners

[0026] 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.

[0027] 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 making creative efforts fall within the scope of protection of the present utility model.

[0028] In the following embodiments, with reference to Figures 1 to 4 the coordinate system shown, the direction indicated by the arrow of the X-axis is to the right, the direction indicated by the arrow of the Y-axis is to the front, and the direction indicated by the arrow of the Z-axis is upward. And the electrode is conveyed along the X-axis direction to flow in from the left side of the box body 100 and flow out from the right side.

[0029] Embodiment 1:

[0030] As Figures 1 to 3 shown, a laser drying oven 10 is provided, including: a box body 100, an upper laser drying component 110 and a lower laser drying component 120; the upper laser drying component 110 and the lower laser drying component 120 are installed in the box body 100, and an electrode drying channel 130 is arranged between the upper laser drying component 110 and the lower laser drying component 120 to laser-dry both sides of the electrode flowing into the box body 100.

[0031] Specifically, the upper and lower surfaces of the electrode sheet are evenly coated with slurry. An inlet is provided on the left side of the box body 100, and an outlet is provided on the right side. The inlet, the electrode sheet drying channel 130, and the outlet are communicated with each other, and the inlet, the electrode sheet drying channel 130, and the outlet are arranged in a straight line so that the electrode sheet can be horizontally conveyed from the inlet through the electrode sheet drying channel 130 to the outlet along the X-axis. An upper laser drying assembly 110 is installed on the inner side wall of the upper end of the box body 100 to dry the upper surface of the electrode sheet through the laser beam emitted by the upper laser drying assembly 110; a lower laser drying assembly 120 is installed on the inner side wall of the lower end of the box body 100 to dry the lower surface of the electrode sheet through the laser beam emitted by the lower laser drying assembly 120. And the electrode sheet drying channel 130 is between the upper laser drying assembly 110 and the lower laser drying assembly 120 to facilitate the inflow of the electrode sheet and drying. Moreover, the distance from the electrode sheet to the upper laser drying assembly 110 is equal to the distance from the electrode sheet to the lower laser drying assembly 120 to ensure the same drying state on both sides of the electrode sheet.

[0032] It should be noted that by providing the upper laser drying assembly 110 and the lower laser drying assembly 120 inside the box body 100, the conventional hot air convection drying can be replaced by laser drying. It directly converts electrical energy into the form of laser to cover and irradiate the wet film of the electrode sheet, so that the energy conversion utilization rate can be greatly improved, thus achieving the purpose of rapid drying; and by arranging the laser drying structures on both the front and back sides of the electrode sheet in a single-section oven, the wet films on both the front and back sides of the electrode sheet can be heated and dried simultaneously. That is, through the high-energy drying of the laser and the setting of drying the wet films on both sides of the electrode sheet at the same time, it can effectively avoid the overlong drying time caused by hot air convection drying and single-sided wet film drying in the oven, making the drying speed of the electrode sheet faster and the operating speed of the equipment faster, thus effectively improving the output rate of the lithium battery electrode sheet. And through the high-energy design, the length of the oven is shortened, realizing the reduction of the equipment manufacturing cost and the reduction of the plant floor area.

[0033] Embodiment 2

[0034] This embodiment is a further implementation manner of Embodiment 1. As Figure 3 shown, in this embodiment, optical elements 140 are provided between the upper laser drying assembly 110 and the electrode sheet drying channel 130, and between the lower laser drying assembly 120 and the electrode sheet drying channel 130 to separate the electrode sheet drying channel 130.

[0035] Specifically, the front and rear ends of the optical element are connected to the side walls of the box body 100, and one optical element 140 is disposed between the upper laser drying assembly 110 and the upper end of the electrode drying channel 130, and another optical element 140 is disposed between the lower laser drying assembly 120 and the lower end of the electrode drying channel 130. As the boundary separation of the air flow field in the intermediate drying area, the optical element 140 can not only allow the laser to penetrate, enabling the laser to dry the wet film of the electrode, but also prevent the wet slurry from contaminating the lower laser drying assembly 120 during the operation of the wet film. Therefore, by using the optical element 140, the service life of the lower laser drying assembly 120 is effectively extended.

[0036] Among them, the material of the optical element 140 can be selected but is not limited to high-transmission glass, as long as it can achieve laser penetration in a high-temperature environment.

[0037] To facilitate improving the drying quality, as Figure 1 、 Figure 3 and Figure 5 shown, in some embodiments, both the upper laser drying assembly 110 and the lower laser drying assembly 120 include a plurality of laser emitters 220, and the laser emitters 220 in the upper laser drying assembly 110 and the laser emitters 220 in the lower laser drying assembly 120 are arranged staggeredly.

[0038] Specifically, the laser emitter 220 is driven by a laser generator 200. The laser generator 200 is a power drive unit, and each laser generator 200 corresponds to a laser emitter 220 to enable the laser emitter 220 to emit a laser beam. The laser emitters 220 on the upper and lower sides of the electrode drying channel 130 are distributed in a staggered manner, so as to avoid the energy concentration at a certain position caused by the laser beams on both sides being in the same position when the intensity of the laser beam is relatively large, thereby avoiding the over-drying phenomenon caused by energy concentration and being beneficial to improving the drying quality. Among them, the laser emitter 220 is disposed on the top side wall or the bottom side wall of the box body 100 and on the upper side or the lower side of the electrode drying channel 130. The semiconductor element inside the laser emitter 220 converts electrical energy into laser.

[0039] To facilitate the use of the laser emitter 220, as Figure 3 and Figure 5 shown, in some embodiments, the laser drying oven 10 further includes a cooling component 210, and the cooling component 210 contacts and cools the laser emitter 220 through a pipeline.

[0040] Specifically, due to the high working temperature of the laser emitter 220, it is connected to the cooling component 210 through a pipeline for cooling.

[0041] Among them, the cooling component 210 can be selected but is not limited to a chiller.

[0042] In order to ensure the stable transportation of the electrode sheet, in some embodiments, the box body 100 is connected with an air inlet assembly that generates a horizontal laminar flow in the electrode sheet drying channel 130 through ventilation.

[0043] In this way, the air field in the form of horizontal laminar flow can not only keep the electrode sheet stably suspended, but also timely take away the evaporated moisture. Compared with the wavy running state of the electrode sheet during conventional hot air convection drying, it is more conducive to the stability of the laser focal length focusing.

[0044] For the convenience of using the air inlet assembly, as Figures 1 to 4 shown, in some embodiments, the air inlet assembly includes a side air inlet box 300, an air inlet fan for sending air into the side air inlet box 300, and an exhaust fan 700 for exhausting the hot air in the electrode sheet drying channel 130. The side air inlet box 300, the air inlet fan, and the exhaust fan 700 are all connected to the box body 100, and the side air inlet box 300 is communicated with the electrode sheet drying channel 130.

[0045] Specifically, the side air inlet box 300 is arranged on the left side of the front end of the box body 100. The side air inlet box 300 has an air inlet cavity 310. The side air inlet box 300 is connected with a fresh air pipe 320, and the fresh air pipe 320 is communicated with the air inlet cavity 310 so that fresh air can enter the air inlet cavity 310 from the fresh air pipe 320. And two openings are formed on the outer surface of the front side of the box body 100. The air inlet cavity 310 is communicated with the left side of the box body 100 through the two openings, so that the side air inlet box 300 can ventilate the upper and lower sides of the electrode sheet drying channel 130. Among them, the two openings are arranged at the upper and lower ends of the inlet. The air inlet fan is connected to the box body 100. The air inlet fan sends the air in the fresh air pipe 320 into the air inlet cavity 310, and sends the air in the air inlet cavity 310 into the electrode sheet drying channel 130 through the openings, and then is led out by the exhaust fan 700, so as to form a horizontal laminar flow in the electrode sheet drying channel 130.

[0046] It can be understood that the air inlet assembly can be set to other conventional air inlet structures, as long as it can form a horizontal laminar flow in the electrode sheet drying channel 130, which is known to those skilled in the art and can be realized, and will not be described in detail in this embodiment.

[0047] For the convenience of air return, as Figures 1 to 4 shown, in some embodiments, the box body 100 is connected with an air return assembly that recovers the hot air in the electrode sheet drying channel 130 into the air inlet assembly.

[0048] Specifically, through the air return function of the air return assembly, part of the hot air can be utilized, reducing losses and production costs.

[0049] For the convenience of using the air return assembly, as Figures 1 to 4As shown, in some embodiments, a circulation box 500 is provided on the box body 100, and both ends of the circulation box 500 are respectively communicated with the pole piece drying channel 130 and the side air inlet box 300. The air inlet fan is provided as a circulation fan 400 that can be used to recover the hot air in the pole piece drying channel 130.

[0050] Specifically, the circulation box 500 is arranged in the middle of the front end of the box body 100, and there is a circulation cavity 510 inside the circulation box 500. Both ends of the circulation cavity 510 are respectively communicated with the pole piece drying channel 130 and the air inlet cavity 310. The circulation fan 400 is arranged on the circulation box 500. Through the action of the circulation fan 400, part of the hot air in the pole piece drying channel 130 can be output into the circulation cavity 510 and enter the air inlet cavity 310 through the circulation cavity 510 to recycle the hot air.

[0051] For the convenience of using the air return assembly, as Figures 1 to 4 shown, in some embodiments, a side air return box 600 is provided on the box body 100. The side air return box 600 is arranged opposite to the side air inlet box 300, and both ends of the side air return box 600 are respectively communicated with the pole piece drying channel 130 and the circulation box 500.

[0052] Specifically, the circulation box 500 is arranged between the side air return box 600 and the side air inlet box 300. The side air return box 600 is arranged opposite to the side air inlet box 300. The side air return box 600 has an air return cavity 610. The side air return box 600 is arranged on the right side of the front end of the box body 100. There are two openings on the front outer surface of the box body 100. The side air return box 600 is communicated with the right end of the box body 100 through the two openings, so that the side air return box 600 can return air to the upper and lower sides of the pole piece drying channel 130. Among them, these two openings are arranged at the upper and lower ends of the outlet. The fresh air pipe 320 and the exhaust fan 700 are arranged on the upper surface of the circulation box 500, and the circulation fan 400 is arranged on the front surface of the circulation box 500. Moreover, the fresh air pipe 320, the air inlet cavity 310 and the air return cavity 610 are all communicated with the circulation cavity 510. In this way, fresh air enters the circulation box 500 from the fresh air pipe 320, is transported by the circulation fan 400, enters the pole piece drying channel 130 through the air inlet cavity 310 for upper and lower area air supply, the humid hot air enters the air return cavity 610 in a horizontal laminar flow, then part of it is discharged from the oven by the exhaust fan 700, and the remaining part continues to be mixed with the fresh air and circulates inside the oven again.

[0053] For the convenience of using the circulating air, as Figure 4 shown, in some embodiments, a circulation filter 520 is arranged inside the circulation box 500.

[0054] Specifically, the circulation filter 520 is disposed near the side air inlet box 300. Fresh air enters the circulation box 500 from the fresh air pipe 320, is conveyed by the circulation fan 400, and then is cleaned and filtered by the circulation filter 520, thereby preventing the recycled hot air from soiling the electrode plates.

[0055] It can be understood that the return air assembly can be set to other conventional return air structures, and only needs to be able to recycle the hot air in the electrode plate drying channel 130, which is known to those skilled in the art and can be achieved, and will not be described in detail in this embodiment.

[0056] For facilitating the conveyance and support of the electrode plates, as Figures 1 to 3 shown, in some embodiments, conveying rollers 151 for conveying the electrode plates are respectively disposed on the inlet side and the outlet side of the box body 100.

[0057] Specifically, the left side of the box body 100 has an inlet, and the right side has an outlet. The conveying rollers 151 rotate on the box body 100 to convey the electrode plates. Before the electrode plates are completely dried, both the upper and lower surfaces are wet films, which are not suitable for direct contact support by the conveying rollers 151. Therefore, only the conveying rollers 151 at the head and tail support the whole process of the electrode plates, so as to facilitate ensuring the integrity of the wet films of the electrode plates. Among them, the flat running of the electrode plates is controlled by the tension at both ends.

[0058] For facilitating the layout of the laser drying oven 10, as Figure 1 and Figure 3 shown, in some embodiments, two mounting boxes 150 are disposed on both sides of the box body 100. The mounting boxes 150 have mounting cavities communicating with the side air inlet box 300 or the side return air box 600, and the mounting boxes 150 are provided with electrode plate openings for the electrode plates to pass through, and each conveying roller 151 is rotatably disposed in a mounting cavity.

[0059] Specifically, mounting boxes 150 are disposed on both the left and right sides of the box body 100. The mounting boxes 150 have mounting cavities. The conveying rollers 151 are rotatably disposed in the mounting boxes 150 along the Y-axis direction, and the mounting boxes 150 are horizontally provided with electrode plate openings along the X-axis direction. In the left mounting box 150: the mounting cavity communicates with the inlet through the electrode plate opening; in the right mounting box 150: the mounting cavity communicates with the outlet through the electrode plate opening. In this way, it is convenient for the installation of the conveying rollers 151.

[0060] For facilitating the monitoring of the temperature of the electrode plates, as Figure 3 shown, in some embodiments, a sensor 160 for monitoring the temperature of the surface of the electrode plates is disposed in the box body 100.

[0061] Specifically, the sensor 160 is optional but not limited to an infrared temperature sensor. The surface temperature of the wet film is detected by the sensor 160 and electrically connected to the laser emitter 220 to participate in the control of the operation of the laser emitter 220, so as to facilitate the timely control of the drying temperature.

[0062] To facilitate the observation of the internal drying situation, such as Figure 2 As shown, in some embodiments, an observation window 170 for observing the inside of the box body 100 is embedded in the box body 100.

[0063] Specifically, the number of the observation windows 170 is optional but not limited to 3, and the material of the observation windows 170 is optional but not limited to high-temperature resistant glass. Through the setting of the observation windows 170, it is convenient to observe the situation inside the oven.

[0064] Referring to Figures 1 to 5 , during operation, fresh air enters the circulation chamber 510 from the fresh air pipe 320, is transported by the circulation fan 400, and then is cleaned and filtered by the circulation filter 520. It enters the air inlet chamber 310 for upper and lower area air supply. The circulating air presents a horizontal laminar flow on the upper and lower surfaces of the electrode plate, and can timely carry away the evaporated moisture. The laser emitter 220 emits laser, passes through the optical element 140, and covers the surface of the electrode plate, thereby drying the surface of the electrode plate. Since the laser emitter 220 is configured on both the front and back sides of the electrode plate, both sides can be dried simultaneously, and the surface temperature of the electrode plate is detected by the sensor 160 and participates in the laser operation control. The humid and hot air with moisture enters the return air chamber 610 horizontally in a laminar flow, and then a part of it is discharged to the outside by the exhaust fan 700, and the remaining part continues to be mixed with the fresh air and circulates inside again to complete the internal air field circulation. During the whole process, the wet film electrode plate enters the box body 100 and a dried electrode plate is obtained when it exits the box body 100.

[0065] It can be understood that maintenance doors are installed on both the front and back sides of the box body 100 for easy repair.

[0066] Embodiment 3

[0067] Provide a coating machine, including the laser drying oven 10 of Embodiment 1 or 2.

[0068] Specifically, after double-sided coating is completed, the electrode plate with a double-sided wet film can flow into the laser drying oven 10 for drying. Through the combined use of the conventional devices used in coating and the laser drying oven 10, the coating process is completed. It can be understood that, among them, the way of the combined use of each conventional device and the laser drying oven 10 is known to those skilled in the art and can also be realized, and will not be described in detail in this embodiment.

[0069] In the present utility model, unless otherwise clearly defined and limited, terms such as "installation", "connection", "linkage", "fixation" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral one; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0070] 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 usually 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, and therefore 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.

[0071] In addition, terms such as "horizontal", "vertical", "hanging" do not mean that the component is required to be absolutely horizontal or hanging, 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.

[0072] In the present utility model, unless otherwise clearly defined and limited, the first feature being above or below the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through additional features therebetween. Moreover, the first feature being above, over and on the second feature includes that the first feature is directly above and obliquely above the second feature, or merely means that the horizontal height of the first feature is higher than that of the second feature. The first feature being below, under and beneath the second feature includes that the first feature is directly below and obliquely below the second feature, or merely means that the horizontal height of the first feature is lower than that of the second feature.

[0073] Although the description of the present utility model is made in combination with the above specific embodiments, it is obvious that those skilled in the art can make many substitutions, modifications and changes based on the above content. Therefore, all such substitutions, improvements and changes are included within the spirit and scope of the appended claims.

Claims

1. A laser drying oven, characterized in that, Comprising: A box body (100), an upper laser drying assembly (110) and a lower laser drying assembly (120); The upper laser drying assembly (110) and the lower laser drying assembly (120) are installed in the box body (100), and a pole piece drying channel (130) is arranged between the upper laser drying assembly (110) and the lower laser drying assembly (120) to laser-dry both sides of the pole piece flowing into the box body (100).

2. The laser drying oven according to claim 1, wherein Optical elements (140) are arranged between the upper laser drying assembly (110) and the pole piece drying channel (130), and between the lower laser drying assembly (120) and the pole piece drying channel (130) to separate the pole piece drying channel (130).

3. The laser drying oven according to claim 1, characterized in that, Both the upper laser drying assembly (110) and the lower laser drying assembly (120) include a plurality of laser emitters (220), and the laser emitters (220) in the upper laser drying assembly (110) and the laser emitters (220) in the lower laser drying assembly (120) are arranged staggeredly.

4. The laser drying oven according to claim 3, characterized in that, It further includes a cooling assembly (210), and the cooling assembly (210) contacts and cools the laser emitter (220) through a pipeline.

5. The laser drying oven according to any one of claims 1 to 3, characterized in that, The box body (100) is connected with an air inlet assembly that generates a transverse laminar flow in the pole piece drying channel (130) through ventilation.

6. The laser drying oven according to claim 5, wherein The box body (100) is connected with a return air assembly that recovers the hot air in the pole piece drying channel (130) to the air inlet assembly.

7. The laser drying oven according to any one of claims 1 to 3, characterized in that, Over rollers (151) for conveying the pole piece are respectively arranged on the inlet side and the outlet side of the box body (100).

8. The laser drying oven according to any one of claims 1 to 3, characterized in that, A sensor (160) for monitoring the temperature of the pole piece surface is arranged in the box body (100).

9. The laser drying oven according to any one of claims 1 to 3, characterized in that An observation window (170) for observing the inside of the box body (100) is embedded on the box body (100).

10. A coater, characterized in that, Including the laser drying oven (10) according to any one of claims 1 to 9.

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