Drying device and drying system

Abstract

The utility model relates to the technical field of coating ovens, in particular to a drying device and a drying system. The drying device provided by the utility model comprises a drying oven, an air duct, an air nozzle, an air supplementing structure and a heating assembly, the air duct is provided with an air supply loop and an air return loop, the air supply loop communicates with the tuyere and is used for supplying air to the tuyere, and the tuyere is provided with an air blowing opening for blowing air to the pole piece; the air supplementing structure is used for blowing air into the drying oven to reduce the concentration of NMP in the drying oven, the blowing direction of the air supplementing structure is different from that of the blowing opening, and the heating assembly is used for heating gas in the drying oven. The air supplement structure blows air into the oven, so that the concentration of NMP in the oven can be reduced without increasing the air speed of the tuyere, the heating assembly is not limited to be additionally arranged on the rear sections of the oven, the drying efficiency is further improved, the energy efficiency of the oven in unit length is improved, the coating speed is increased, and the overall length of the oven is shortened.

Description

Technical Field

[0001] The utility model relates to the technical field of coating ovens, in particular to a drying device and a drying system. Background Art

[0002] During the manufacturing process of lithium batteries, the pole pieces need to be dried in an oven after coating. In the prior art, the heating source is outside the oven body, and there is no direct heating source inside. The highest temperature in the box is the temperature of the hot air blown out by the nozzle. Generally, the hot air (air) is within 150°C, which is far below the ignition point of NMP gas. Since the air used is directly heated and blown into the box body for drying, combustion aids are inevitable. The concentration of NMP gas in the box body is controlled by controlling the air volume in and out of the box body; the air inlet in the box body generally enters through the drying nozzle, and the air outlet is discharged through the return air port, and the box body basically maintains a slight negative pressure; the concentration of NMP dried with hot air is controlled at 0.25LEL0.25LEL (explosion lower limit).

[0003] At present, in order to improve the energy efficiency of the oven per unit length, increase the coating speed and shorten the overall length of the oven, a heating module is often installed inside the oven. There is no explosion-proof requirement after the heating module is installed in the negative electrode oven. After the heating module is installed in the positive electrode oven, due to the high temperature of the heating module, explosion-proof issues need to be considered. Generally, the air volume is increased by increasing the nozzle wind speed to control the NMP concentration at 0.1LEL to avoid explosion.

[0004] However, increasing the wind speed through the air nozzle will cause damage to the coating. Therefore, the heating module can only be installed in the last few sections of the oven where the NMP content of the corresponding electrode is relatively low and the coating is basically dry, in order to reduce damage to the coating. Even if the heating module is installed in the last few sections of the oven, it will still have an impact on the coating, and limit the use of the heating module in the entire section of the positive electrode oven, and thus cannot further improve the drying efficiency, improve the energy efficiency of the oven per unit length, increase the coating speed and shorten the overall length of the oven. Utility Model Content

[0005] The purpose of the utility model is to provide a drying device and a drying system to solve the technical problem in the prior art that even if the heating module is added to the latter sections of the oven, it will still have an impact on the coating, and limit the use of the heating module in the entire section of the positive electrode oven, thereby failing to further improve the drying efficiency, improve the energy efficiency of the oven per unit length, increase the coating speed, and shorten the overall length of the oven.

[0006] The utility model provides a drying device, comprising: a drying oven, an air duct, an air nozzle, an air supply structure and a heating component;

[0007] A pole piece inlet is provided at one end of the oven, and a pole piece outlet is provided at the other end of the oven, and the pole piece inlet and the pole piece outlet are used for the pole piece to enter and exit the oven;

[0008] The air duct, the air nozzle and the heating component are all arranged on the oven, the air nozzle and the heating component are all located in the oven, and a plurality of the air nozzles and the heating component are arranged along the direction from the pole piece inlet to the pole piece outlet;

[0009] The air duct has an air supply circuit and an air return circuit, the air supply circuit is connected to the air nozzle and is used to supply air to the air nozzle, the air nozzle has an air blowing port for blowing air to the pole piece, and the air return circuit is connected to the inside of the oven and is used to return air to the inside of the oven;

[0010] The air supply structure is used to blow air into the oven to reduce the concentration of NMP in the oven, and the blowing direction of the air supply structure is different from the blowing direction of the blowing port. The heating component is used to heat the gas in the oven.

[0011] As a further technical solution, the air supply structure includes a first air supply port arranged on the air nozzle.

[0012] As a further technical solution, the air supply structure includes a second air supply port arranged on the air duct, and the second air supply port is connected to the air supply circuit.

[0013] As a further technical solution, the heating component includes a cavity and an infrared lamp tube, and the infrared lamp tube is arranged in the cavity.

[0014] As a further technical solution, the cavity includes a shell and a glass slide, one end of the shell is connected to the air duct and communicated with the air supply circuit, the other end of the shell is open, the glass slide is arranged at the opening, the infrared lamp tube is arranged in the shell, and the shell is positively pressurized;

[0015] The air supply structure includes a third air supply port arranged on the shell.

[0016] As a further technical solution, it also includes a pressure detection member and a first temperature detection member;

[0017] The pressure detecting member is used to detect the pressure in the shell, and the first temperature detecting member is used to detect the temperature of the shell.

[0018] As a further technical solution, it also includes a second temperature detection member, a third temperature detection member and an NMP concentration detection member;

[0019] The second temperature detection element is used to detect the temperature of the gas in the oven, the third temperature detection element is used to detect the temperature of the surface of the electrode, and the NMP concentration detection element is used to detect the concentration of NPM in the oven.

[0020] As a further technical solution, the air nozzles and the heating components are alternately arranged along the direction from the pole piece inlet to the pole piece outlet.

[0021] As a further technical solution, the air nozzle and the heating assembly are provided on both the upper and lower sides of the oven;

[0022] Along the direction from the pole piece inlet to the pole piece outlet, the air nozzles located on the upper and lower sides of the oven are staggered, and the heating components located on the upper and lower sides of the oven are staggered.

[0023] The utility model provides a drying system, comprising the drying device.

[0024] Compared with the prior art, the drying device and drying system provided by the utility model have the following technical advantages:

[0025] The drying device provided by the utility model comprises: an oven, an air duct, an air nozzle, an air supply structure and a heating component; a pole piece inlet is arranged at one end of the oven, a pole piece outlet is arranged at the other end of the oven, and the pole piece inlet and the pole piece outlet are used for the pole piece to enter and exit the oven; the air duct, the air nozzle and the heating component are all arranged on the oven, the air nozzle and the heating component are all located in the oven, and a plurality of air nozzles and heating components are arranged along the direction from the pole piece inlet to the pole piece outlet; the air duct has an air supply circuit and a return air circuit, the air supply circuit is connected to the air nozzle and is used for supplying air to the air nozzle, the air nozzle has a blowing port for blowing air to the pole piece, and the return air circuit is connected to the inside of the oven and is used for returning air to the inside of the oven; the air supply structure is used for blowing air into the oven to reduce the concentration of NMP in the oven, and the blowing direction of the air supply structure is different from the blowing direction of the blowing port, and the heating component is used for heating the gas in the oven.

[0026] By blowing air into the oven through the air supply structure, the concentration of NMP in the oven can be reduced without increasing the wind speed through the air nozzle, thereby completely avoiding the influence of the air blown by the air nozzle on the coating on the electrode, and the heating component is not limited to being installed in the last few sections of the oven, but can be installed in the entire section of the oven from the electrode inlet to the electrode outlet, thereby further improving the drying efficiency, improving the energy efficiency of the oven per unit length, increasing the coating speed and shortening the overall length of the oven. At the same time, the blowing direction of the air supply structure is different from that of the air outlet, which can avoid the air blown by the air supply structure from acting on the coating of the electrode, or avoid the air blown by the air supply structure and the air blown by the air nozzle from acting on the same place of the coating on the electrode, thereby effectively avoiding damage to the coating.

[0027] The drying system provided by the utility model includes the above-mentioned drying device, and thus the technical advantages and effects achieved by the utility model include the technical advantages and effects achieved by the above-mentioned drying device, which will not be elaborated in detail here.

[0028] Other features and advantages of the present invention will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 A schematic diagram of the structure of a drying device provided in an embodiment of the utility model;

[0031] Figure 2 A schematic diagram of the wind direction of the air outlet of the air nozzle provided in the embodiment of the utility model;

[0032] Figure 3 A schematic diagram of the wind direction of the air outlet and the first air supply outlet of the air nozzle provided in an embodiment of the utility model;

[0033] Figure 4 A schematic diagram of the wind direction of the air outlet and the second air supply outlet of the air nozzle provided in an embodiment of the utility model;

[0034] Figure 5 A schematic diagram of the wind direction of the air outlet and the third air supply outlet of the air nozzle provided in an embodiment of the utility model;

[0035] Figure 6 A schematic diagram of the heating assembly structure provided in an embodiment of the utility model.

[0036] Icons: 1- oven; 2- air duct; 3- air nozzle; 4- heating component; 5- electrode; 6- electrode inlet; 7- electrode outlet; 8- infrared lamp tube; 9- shell; 10- glass slide; 11- second temperature detection element; 12- third temperature detection element. DETAILED DESCRIPTION

[0037] The technical solution of the utility model will be described clearly and completely in conjunction with the embodiments below. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0038] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention 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 cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0039] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0041] The present invention will be further described in detail below through specific implementation examples in conjunction with the accompanying drawings.

[0042] Specific structure such as Figures 1 to 6 shown.

[0043] The present embodiment provides a drying device, comprising: an oven 1, an air duct 2, an air nozzle 3, an air supply structure and a heating component 4; a pole piece inlet 6 is provided at one end of the oven 1, a pole piece outlet 7 is provided at the other end of the oven 1, and the pole piece inlet 6 and the pole piece outlet 7 are used for the pole piece 5 to enter and exit the oven 1; the air duct 2, the air nozzle 3 and the heating component 4 are all provided on the oven 1, the air nozzle 3 and the heating component 4 are all located in the oven 1, and a plurality of the air nozzles 3 and the heating component 4 are provided along the direction from the pole piece inlet 6 to the pole piece outlet 7; the air duct 2 has an air supply circuit and a return air circuit, the air supply circuit is connected to the air nozzle 3 and is used to supply air to the air nozzle 3, the air nozzle 3 has an air outlet for blowing air to the pole piece 5, and the return air circuit is connected to the inside of the oven 1 and is used to return air to the inside of the oven 1; the air supply structure is used to blow air into the oven 1 to reduce the concentration of NMP in the oven 1, and the blowing direction of the air supply structure is different from the blowing direction of the air outlet, and the heating component 4 is used to heat the gas in the oven 1.

[0044] In this embodiment, the air supply structure is used to blow air into the oven 1 so that the air nozzle 3 can reduce the concentration of NMP in the oven 1 without increasing the wind speed, thereby completely avoiding the influence of the air blown by the air nozzle 3 on the coating on the electrode 5, and the heating component 4 is not limited to being installed in the latter sections of the oven 1, but can be installed in the entire section of the oven 1 along the direction from the electrode inlet 6 to the electrode outlet 7, thereby further improving the drying efficiency, improving the energy efficiency of the oven per unit length, increasing the coating speed and shortening the overall length of the oven 1. At the same time, the blowing direction of the air supply structure is different from the blowing direction of the air outlet, which can avoid the air blown by the air supply structure from acting on the coating of the electrode 5, or avoid the air blown by the air supply structure and the air blown by the air nozzle 3 from acting on the same place of the coating on the electrode 5 at the same time, thereby effectively avoiding damage to the coating.

[0045] In this embodiment, the air supply structure can be a separately arranged fan, which is connected to the inside of the oven 1 through an air duct. After the fan is working, it blows air into the oven 1 through the air duct.

[0046] In the optional technical solution of this embodiment, the air supply structure in this embodiment can adopt the first implementation mode, that is, the air supply structure includes a first air supply port arranged on the air nozzle 3. The first air supply port is arranged on the air nozzle 3, and the air nozzle 3 can blow air through the blowing port and the first air supply port at the same time, so that the air blown by the first air supply port is provided through the air supply circuit, the structure is simple, and the first air supply port blows hot air, which ensures the temperature in the oven 1. Preferably, one end of the air nozzle 3 is connected to the air supply circuit, and the blowing port is arranged at the other end. The first air supply port is arranged on the side wall of the air nozzle 3, so that the first air supply port can blow air horizontally to avoid blowing on the coating of the pole piece 5, thereby avoiding damage to the coating.

[0047] In the optional technical solution of this embodiment, the air supply structure in this embodiment can adopt the second implementation mode, that is, the air supply structure includes a second air supply port arranged on the air duct 2, and the second air supply port is connected to the air supply circuit. The second air supply port connected to the air supply circuit is arranged on the air duct 2, so that the wind blown by the second air supply port is provided by the air supply circuit, the structure is simple, and the second air supply port blows hot air, which ensures the temperature in the oven 1. It should be noted that, although the direction of the wind blown by the second air supply port is toward the coating of the electrode 5, the wind speed is small and will not affect the coating of the electrode 5. At the same time, since the blowing direction of the second air supply port is different from the blowing direction of the blowing port, and the second air supply port and the air nozzle 3 are not in the same position along the direction from the electrode inlet 6 to the electrode outlet 7, it can avoid that the wind blown by the second air supply port and the wind blown by the air nozzle 3 act on the same place of the coating on the electrode 5 at the same time, thereby effectively avoiding the wind blown by the second air supply port from damaging the coating.

[0048] It should be noted that two blowing ports are provided at one end of the air nozzle 3, and the direction of the wind blown out of the blowing ports is not only toward the coating of the pole piece 5, but also the direction of the wind blown out of the two blowing ports is relatively inclined inward to form a circulating wind, thereby improving the drying effect of the coating on the pole piece 5 and avoiding damage to the coating.

[0049] In the optional technical solution of this embodiment, the heating component 4 can be a laser heating module or a heating component 4 in other forms, as long as the requirements are met.

[0050] In this embodiment, the heating assembly 4 includes a cavity and an infrared lamp 8, and the infrared lamp 8 is arranged in the cavity. When the infrared lamp 8 is working normally, the temperature is generally around 600-1000°C, and the heating effect is good. At the same time, in order to prevent the gas in the oven 1 from entering the cavity, the cavity can be sealed to effectively avoid explosion.

[0051] Furthermore, the cavity includes a shell 9 and a glass slide 10. One end of the shell 9 is connected to the air duct 2 and is connected to the air supply circuit. The other end of the shell 9 is open. The glass slide 10 is arranged at the opening. The infrared lamp tube 8 is arranged in the shell 9, and the shell 9 is under positive pressure. The air supply structure includes a third air supply port arranged on the shell 9.

[0052] Specifically, the upper end of the shell 9 is connected to the air duct 2 and is connected to the air supply circuit of the air duct 2. The lower end of the shell 9 has an opening, and a glass slide 10 is arranged at the opening. The infrared lamp tube 8 located in the shell 9 is heated and transfers heat to the oven 1 through the broken pieces with high efficiency, but it is not limited to this. Other sealing sheets can also be arranged to package the shell 9.

[0053] In this embodiment, the air supply structure can adopt the third implementation mode, that is, a third air supply port is provided on the side wall of the shell 9, so that the wind blown by the third air supply port is provided through the air supply circuit, the structure is simple, and the third air supply port blows hot air, which can not only ensure the temperature in the oven 1, but also take away the heat generated by the infrared lamp 8 when flowing through the shell 9, thereby improving the efficiency of the infrared lamp 8 in heating the oven 1. In addition, since the third air supply port is provided on the side wall of the shell 9, the third air supply port can blow air horizontally to avoid blowing on the coating of the pole piece 5, thereby avoiding damage to the coating.

[0054] In this embodiment, since the third air supply port is provided on the shell 9, in order to prevent the gas in the oven 1 from entering the shell 9, it is necessary to ensure that the shell 9 is always in a positive pressure state to improve the explosion-proof effect.

[0055] It should be noted that the air supply structure in this embodiment can adopt any one of the three implementations mentioned above, and can also adopt any one of the arrangements and combinations of the three implementations mentioned above.

[0056] The optional technical solution of this embodiment further includes a pressure detection member and a first temperature detection member; the pressure detection member is used to detect the pressure in the shell 9, and the first temperature detection member is used to detect the temperature of the shell 9. By real-time monitoring of the pressure in the shell 9 and the temperature of the shell 9, the explosion-proof effect is further improved.

[0057] Specifically, the first temperature detection component is a K-type temperature patch sensor, and the K-type temperature patch sensor is attached to the shell 9 to monitor the temperature of the shell 9 accurately, but it is not limited to this, and it can also be other temperature sensors as long as the requirements are met.

[0058] The pressure detection component can be a high temperature resistant pressure gauge, and the high temperature resistant pressure gauge is arranged on the housing 9, or the pressure detection component can be a normal temperature pressure gauge, and the normal temperature pressure gauge is arranged outside the oven 1 and connected to the housing 9 through an air pipe. However, the pressure detection component is not limited to this, and can also be other pressure detection sensors as long as the requirements are met.

[0059] The optional technical solution of this embodiment also includes a second temperature detection member 11, a third temperature detection member 12 and an NMP concentration detection member; the second temperature detection member 11 is used to detect the temperature of the gas in the oven 1, the third temperature detection member 12 is used to detect the temperature of the surface of the pole piece 5, and the NMP concentration detection member is used to detect the concentration of NPM in the oven 1. By real-time monitoring of the temperature of the gas in the oven 1, the temperature of the surface of the pole piece 5 and the concentration of NPM in the oven 1, the drying effect of the oven 1 is guaranteed and the explosion-proof effect is further improved.

[0060] Specifically, the second temperature detection member 11 is a PT100 temperature sensor, and the PT100 temperature sensor is arranged in the oven 1 to monitor the temperature of the gas in the oven 1 accurately, and the third temperature detection member 12 is an infrared temperature sensor, and the infrared temperature sensor is arranged in the oven 1 to monitor the temperature of the surface of the electrode 5 accurately. However, it is not limited to this, and the second temperature detection member 11 and the third temperature detection member 12 can also be other temperature sensors as long as they meet the requirements.

[0061] The NMP concentration detection element is an NMP concentration sensor, and the NMP concentration sensor is arranged at the pole piece outlet 7 of the oven 1 .

[0062] In the optional technical solution of this embodiment, the air nozzles 3 and the heating components 4 are alternately arranged along the direction from the pole piece inlet 6 to the pole piece outlet 7. Multiple air nozzles 3 and heating components 4 are provided, and they are arranged alternately, that is, the heating components 4 are not only arranged in the last few sections of the oven 1, but are arranged in the entire section of the oven 1, so as to improve the drying efficiency.

[0063] In the optional technical solution of this embodiment, air nozzles 3 and heating components 4 are provided on the upper and lower sides of the oven 1; along the direction from the pole piece inlet 6 to the pole piece outlet 7, the air nozzles 3 located on the upper and lower sides of the oven 1 are staggered, and the heating components 4 located on the upper and lower sides of the oven 1 are staggered.

[0064] Specifically, the oven 1 includes an upper box and a lower box, and the upper box and the lower box are both provided with air nozzles 3 and heating components 4, and the pole piece 5 passes between the upper box and the lower box, and the air nozzles 3 and heating components 4 located in the upper box and the air nozzles 3 and heating components 4 located in the lower box simultaneously dry both sides of the pole piece 5, thereby achieving simultaneous drying of the pole piece 5. At the same time, the air nozzles 3 located on the upper and lower sides of the oven 1 are staggered, and the staggered arrangement of the heating components 4 located on the upper and lower sides of the oven 1 enables the pole piece 5 to be uniformly dried along the direction from the pole piece inlet 6 to the pole piece outlet 7, thereby improving the drying efficiency and effect of the pole piece 5.

[0065] Furthermore, along the direction from the pole piece inlet 6 to the pole piece outlet 7, the air nozzles 3 and the heating components 4 of the upper box body can be arranged alternately, or the air nozzles 3 and the heating components 4 of the lower box body can be arranged alternately. Preferably, the air nozzles 3 and the heating components 4 of both the upper box body and the lower box body are arranged alternately.

[0066] The present embodiment provides a drying system, including the above-mentioned drying device. Therefore, the technical advantages and effects achieved by the drying system include the technical advantages and effects achieved by the above-mentioned drying device, which will not be repeated here.

[0067] In this embodiment, the drying system further includes a control module, and the pressure detection element, the first temperature detection element, the second temperature detection element 11, the third temperature detection element 12 and the NMP concentration detection element are all electrically connected to the control module. By monitoring the pressure in the shell 9 of the oven 1, the temperature of the shell 9, the temperature of the gas in the oven 1, the temperature of the surface of the pole piece 5 and the concentration of NPM in the oven 1, the explosion-proof boundary condition of the oven 1 is monitored in real time in a closed loop.

[0068] Specific explosion-proof necessary conditions: the concentration of NPM in the oven 1 is below 0.1LEL, the temperature of the shell 9 is below 320°C, the pressure in the shell 9 is greater than 50Pa, and the temperature of the surface of the pole piece 5 is less than 150°C.

[0069] If one of the above conditions is not met, the following operations need to be performed: the control module controls to stop coating, heating of the infrared lamp tube 8, stopping heating of the hot air in the air duct 2, increasing the ventilation volume of the air supply circuit of the air duct 2 to the oven 1 and increasing the ventilation volume of the air supply circuit of the air duct 2 to the shell 9, so as to realize closed-loop real-time monitoring of the explosion-proof boundary conditions of the oven 1.

[0070] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A drying device, characterized in that: include: A drying oven (1), an air duct (2), an air nozzle (3), an air supply structure and a heating component (4); A pole piece inlet (6) is provided at one end of the oven (1), and a pole piece outlet (7) is provided at the other end of the oven (1), and the pole piece inlet (6) and the pole piece outlet (7) are used for the pole piece (5) to enter and exit the oven (1); The air duct (2), the air nozzle (3) and the heating assembly (4) are all arranged on the oven (1); the air nozzle (3) and the heating assembly (4) are both located inside the oven (1), and a plurality of the air nozzles (3) and the heating assembly (4) are arranged along the direction from the pole piece inlet (6) to the pole piece outlet (7); The air duct (2) has an air supply circuit and an air return circuit, the air supply circuit is connected to the air nozzle (3) and is used to supply air to the air nozzle (3), the air nozzle (3) has an air blowing port for blowing air to the pole piece (5), and the air return circuit is connected to the interior of the oven (1) and is used to return air to the interior of the oven (1); The air supply structure is used to blow air into the oven (1) to reduce the concentration of NMP in the oven (1), and the blowing direction of the air supply structure is different from the blowing direction of the blowing port. The heating component (4) is used to heat the gas in the oven (1).

2. The drying device according to claim 1, characterized in that: The air supply structure comprises a first air supply port arranged on the air nozzle (3).

3. The drying device according to claim 1, characterized in that: The air supply structure comprises a second air supply port arranged on the air duct (2), and the second air supply port is connected to the air supply circuit.

4. The drying device according to claim 1, characterized in that: The heating component (4) comprises a cavity and an infrared lamp tube (8), and the infrared lamp tube (8) is arranged in the cavity.

5. The drying device according to claim 4, characterized in that: The cavity comprises a shell (9) and a glass sheet (10); one end of the shell (9) is connected to the air duct (2) and communicates with the air supply circuit; the other end of the shell (9) is open; the glass sheet (10) is arranged at the opening; the infrared lamp tube (8) is arranged in the shell (9); and the shell (9) is under positive pressure; The air supply structure comprises a third air supply port arranged on the shell (9).

6. The drying device according to claim 5, characterized in that: Also includes a pressure detection member and a first temperature detection member; The pressure detection component is used to detect the pressure inside the shell (9), and the first temperature detection component is used to detect the temperature of the shell (9).

7. The drying device according to claim 1, characterized in that: It also includes a second temperature detection element (11), a third temperature detection element (12) and an NMP concentration detection element; The second temperature detection element (11) is used to detect the temperature of the gas in the oven (1), the third temperature detection element (12) is used to detect the temperature of the surface of the electrode (5), and the NMP concentration detection element is used to detect the concentration of NPM in the oven (1).

8. The drying device according to any one of claims 1 to 7, characterized in that: Along the direction from the pole piece inlet (6) to the pole piece outlet (7), the air nozzles (3) and the heating components (4) are arranged alternately.

9. The drying device according to any one of claims 1 to 7, characterized in that: The air nozzle (3) and the heating assembly (4) are arranged on both the upper and lower sides of the oven (1); Along the direction from the pole piece inlet (6) to the pole piece outlet (7), the air nozzles (3) located on the upper and lower sides of the oven (1) are staggered, and the heating components (4) located on the upper and lower sides of the oven (1) are staggered.

10. A drying system, characterized in that: The invention comprises the drying device according to any one of claims 1 to 9.

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