Coating oven device and battery production system

Abstract

The utility model provides a coating oven device and a battery production system.The coating oven device comprises an oven body and a first fan, and a small part of the first fan is arranged in the oven body; wherein the first fan is a first fan without fan blades; the first fan comprises a motor, a magnetic wheel, an air blowing assembly and a bladeless fan; the magnetic wheel is connected with the motor; the air blowing assembly is connected with the motor through the magnetic wheel; the bladeless fan is communicated with the air blowing assembly; the air blowing assembly is used for blowing air to the bladeless fan. In this way, the magnetic wheel can achieve non-contact transmission through the arrangement of the magnetic wheel, and compared with the related technology of transmission through a coupler, the risk of explosion caused by sparks possibly generated by friction can be reduced.

Description

Technical Field

[0001] The present application relates to the field of batteries, and in particular to a coating oven device and a battery production system. Background Art

[0002] Drying of lithium-ion battery pole pieces is a key step in the battery manufacturing process. Its purpose is to remove the solvent in the pole piece and form an electrode structure with good electrochemical performance. The pole piece drying process is generally completed in an oven. However, due to the presence of many fans inside the oven, the internal flow field is uneven, especially in the positive electrode oven where there are flammable and explosive evaporating solvents. Therefore, it is necessary to control the uniform distribution of the wind field in the oven to reduce the situation where the local evaporation of solvents exceeds the standard. Utility Model Content

[0003] The main technical problem solved by the present application is to provide a coating oven device and a battery production system for reducing the excessive amount of solvent gas evaporated locally.

[0004] In order to solve the above technical problems, in the first aspect, a technical solution adopted by the present application is to provide a coating oven device, comprising:

[0005] Box;

[0006] A first fan is at least partially disposed in the housing;

[0007] Wherein, the first fan is a bladeless first fan; the first fan comprises:

[0008] Motor;

[0009] A magnetic wheel connected to the motor;

[0010] A blower assembly connected to the motor via the magnetic wheel;

[0011] a bladeless fan, connected to the air blowing assembly;

[0012] Wherein, the air blowing assembly is used to blow air to the bladeless fan.

[0013] In the above technical solution, by applying the first fan without blades to the coating oven device, the risk of sparks generated by the fan blades colliding with the outer shell is reduced, and the risk of gas in the box being detonated is also reduced. In addition, compared with conventional fans, the first fan without blades provides a larger air volume and can save more energy; and the arrangement of the first fan without blades in the box also breaks the high-horizontal wind speed area formed by the large air volume above the lampshade, promotes the mixing of gas and solvent, and brings the mixed gas to the upper part of the box and discharges it, which more efficiently reduces the solvent concentration on the surface of the pole piece; in addition, since the oven may contain a large amount of flammable and explosive solvent gas, the magnetic wheel can achieve contactless transmission through the setting of the magnetic wheel. Compared with the related technology using coupling transmission, this embodiment can reduce the risk of sparks generated by friction and thus causing explosions.

[0014] In some embodiments, the air blowing assembly includes:

[0015] A rotating shaft, one end of which is connected to the magnetic wheel;

[0016] An impeller, mounted on the rotating shaft;

[0017] An impeller protection cover is sleeved on the outer side of the impeller and spaced apart from the impeller;

[0018] Wherein, the impeller guard is communicated with the bladeless fan.

[0019] In the above technical solution, by providing an impeller guard cover and sleeved the impeller guard cover on the outside of the impeller and spaced apart from the impeller, the risk of direct external contact with the high-speed rotating impeller can be reduced and a vacuum chamber can be provided.

[0020] In some of the embodiments, the annular side wall of the impeller guard has a plurality of ventilation holes.

[0021] In the above technical solution, the wind force can be increased by arranging a plurality of air vents on the annular side wall of the impeller protective cover.

[0022] In some embodiments, the distance between the impeller guard and the impeller is 2.5 mm-4 mm.

[0023] In the above technical solution, by setting the distance between the impeller guard and the impeller to 2.5 mm-4 mm, within this range, the probability of sparks caused by the collision between the impeller guard and the impeller can be reduced, thereby reducing the risk of gas in the box being detonated and improving the reliability of the coating oven device.

[0024] In some of these embodiments, the air blowing assembly further includes a shaft protection cover;

[0025] Along the axial direction of the rotating shaft, the impeller guard has a first port and a second port relative to each other, the other end of the rotating shaft extends from the first port into the impeller guard, and the impeller is installed at the other end of the rotating shaft; the second port is connected to the bladeless fan; the rotating shaft guard is sleeved on the outer side of a portion of the rotating shaft and is connected to the first port.

[0026] In the above technical solution, since the blower assembly includes a shaft guard cover, the shaft guard cover is mounted on the outside of part of the shaft and is connected to the first port of the impeller guard cover, it can protect the shaft, reduce the entry of dust, debris, etc. into the connection part between the shaft and the impeller, and also reduce the risk of gas leakage.

[0027] In some embodiments, the shaft protection cover and the impeller protection cover are both cylindrical; the shaft protection cover is arranged on the outside of the magnetic wheel at one end close to the motor.

[0028] In the above technical solution, by arranging the shaft protection cover close to one end of the motor outside the magnetic wheel, the risk of foreign matter contacting the high-speed rotating magnetic wheel and shaft can be reduced, the impact of the external environment on the magnetic wheel and shaft can be reduced, and the reliability of the blower assembly can be improved.

[0029] In some embodiments, along the axial direction of the rotating shaft, the distance between the rotating shaft protection cover and the magnetic wheel is 2.5 mm-4 mm.

[0030] In the above technical solution, the distance between the impeller guard and the impeller along the axial direction of the rotating shaft is 2.5 mm-4 mm. Within this range, the probability of sparks caused by collision can be reduced, thereby improving the reliability of the coating oven device.

[0031] In some embodiments, the motor is arranged outside the box; the magnetic wheel is arranged inside the box; the side wall of the box has an avoidance hole, the drive shaft of the motor passes through the avoidance hole and is connected to the magnetic wheel, and a seal is provided between the drive shaft of the motor and the hole wall of the avoidance hole.

[0032] In the above technical solution, by providing a seal between the driving shaft of the motor and the hole wall of the avoidance hole, the risk of solvent gas leakage caused by the flow of gas during the operation of the first blower can be reduced.

[0033] In some embodiments, the box body has a relative pole piece inlet and pole piece outlet along a first direction; a plurality of the first fans are arranged at intervals along the first direction; an air flow channel is formed between the plurality of the first fans and the top wall of the box body, the air flow channel has an air inlet at one end close to the pole piece outlet, and an air outlet at one end close to the pole piece inlet; a plurality of the first fans have a belt conveyor on the side away from the air flow channel; the first fan is used to blow the gas in the air flow channel toward the belt conveyor.

[0034] In the above technical solution, the first fan is used to blow the gas in the air flow channel toward the tape channel. On the one hand, the first fan can disperse the gas with higher solvent content in the tape channel and mix it with the gas with higher solvent content, which is beneficial to the drying of the electrode; on the other hand, the first fan can press the electrode and reduce the shaking of the electrode.

[0035] In some embodiments, the coating oven device further comprises:

[0036] A plurality of support rollers are arranged in the belt walking channel at intervals along the first direction;

[0037] A plurality of infrared components are arranged in the tape path at intervals along the first direction;

[0038] Among them, along the second direction, multiple infrared components are arranged between multiple supporting rollers and multiple first fans; the second direction intersects with the first direction; along the second direction, the airflow channel and the belt walking channel are located on opposite sides of the multiple first fans.

[0039] In the above technical solution, on the one hand, the infrared component can heat and dry the electrode piece, which is beneficial to the drying of the electrode piece. On the other hand, the wind blown out by the first fan can mix the gas with low solvent content in the air flow channel with the gas with high solvent content in the belt walking channel, further improving the drying efficiency, and can press the electrode piece on the support roller to reduce the shaking of the electrode piece.

[0040] In some embodiments, the bladeless fan includes an annular shell, the annular side wall of the annular shell is a hollow structure, and the annular side wall has a gap at one end close to the tape walkway; along the second direction, the first fan and the infrared component are staggered, and a gap of the annular shell is exposed to the tape walkway through the gap between two adjacent infrared components.

[0041] In the above technical solution, since the first fan and the infrared component are staggered along the second direction, and the gap of an annular shell is exposed to the tape walkway through the gap between two adjacent infrared components, each first fan can correspond to two infrared components, and the first fan can blow air downward through the gap of the annular shell, which is beneficial to the mixing of the gas with high solvent concentration on the surface of the electrode and the gas with low solvent concentration in the airflow channel, and can also reduce the up and down fluctuation of the electrode in the bottom tape walkway.

[0042] In some embodiments, the annular sidewall includes two short sidewalls extending along the first direction and two long sidewalls extending along a third direction; wherein both the first direction and the second direction intersect with the third direction;

[0043] The long side wall includes an inner side wall and an outer side wall that are spaced apart from each other, wherein one end of the inner side wall close to the tape walkway is bent toward the outer side wall to form a first arc-shaped portion, and one end of the outer side wall close to the tape walkway is bent toward the inner side wall to form a second arc-shaped portion; the gap is formed between the first arc-shaped portion and the second arc-shaped portion, and the air outlet direction of the gap is inclined toward the outside of the annular shell.

[0044] In the above technical solution, the gas flowing in the annular side wall is blown out through the gap. Compared with the vertical air outlet design, the inclined air outlet can make the air outlet more easily reach the bottom of the infrared component, disrupt the flow field of the belt conveyor, and carry the gas with a higher concentration of solvent (for example, NMP) on the surface of the electrode into the air flow channel of the box, thereby reducing the solvent concentration of the gas in the belt conveyor and improving the stability of the coating oven device.

[0045] In some embodiments, the first fan includes two motors, two magnetic wheels and two blowing assemblies; along the third direction, one motor, one magnetic wheel and one blowing assembly are respectively arranged at both ends of the annular shell; along the third direction, the width of the air outlet of the gap first gradually increases and then gradually decreases.

[0046] In the above technical solution, since the first fan includes two motors, two magnetic wheels and two air blowing assemblies, along the third direction, a motor, a magnetic wheel and an air blowing assembly are respectively arranged at both ends of the annular shell, and along the third direction, the width of the air outlet of the gap gradually increases and then gradually decreases. In this way, the uniformity of the air outlet can be increased.

[0047] In order to solve the above technical problems, in the second aspect, another technical solution adopted by the present application is to provide a battery production system, comprising:

[0048] A pole piece coating device, used for coating the slurry on the current collector to form a pole piece;

[0049] The coating oven device provided according to any one of the above embodiments is used to dry the electrode piece.

[0050] In the above technical solution, by applying the first fan without blades to the coating oven device, the risk of sparks generated by the fan blades colliding with the outer shell is reduced, and the risk of gas in the box being detonated is also reduced. In addition, compared with conventional fans, the first fan without blades provides a larger air volume and can save more energy; and the arrangement of the first fan without blades in the box also breaks the high-horizontal wind speed area formed by the large air volume above the lampshade, promotes the mixing of gas and solvent, and brings the mixed gas to the upper part of the box and discharges it, which more efficiently reduces the solvent concentration on the surface of the pole piece; in addition, since the oven may contain a large amount of flammable and explosive solvent gas, the magnetic wheel can achieve contactless transmission through the setting of the magnetic wheel. Compared with the related technology using coupling transmission, this embodiment can reduce the risk of sparks generated by friction and thus causing explosions. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0052] Figure 1 A schematic diagram of the structure of a coating oven device provided in some embodiments of the present application;

[0053] Figure 2 for Figure 1 A schematic diagram of the structure of a part of the box of the coating oven device;

[0054] Figure 3 A schematic diagram of the structure of a first fan and an infrared lamp cover provided in some embodiments of the present application;

[0055] Figure 4 A schematic diagram of a casing flow passage of a first fan provided in some embodiments of the present application;

[0056] Figure 5 A schematic diagram of a three-dimensional structure of a first fan provided in some other embodiments of the present application;

[0057] Figure 6 A schematic diagram of the structure of the first fan and the box body provided in some embodiments;

[0058] Figure 7 A schematic diagram of the structure of a coating oven device provided in some other embodiments of the present application;

[0059] Figure 8 A partial structural schematic diagram of a coating oven device provided in some other embodiments of the present application;

[0060] Fig. 9 A partial structural schematic diagram of a coating oven device provided in some further embodiments of the present application;

[0061] Fig.10 A schematic diagram of the three-dimensional structure of a first fan provided in some further embodiments of the present application;

[0062] Fig.11 for Fig.10 Exploded schematic diagram of the first fan;

[0063] Fig.12 for Fig.10 A top view of the first fan;

[0064] Fig.13 A schematic diagram of the structure of the first fan and the box assembly provided by other embodiments of the present application;

[0065] Fig.14 for Fig.10 A partial structural schematic diagram of a first fan provided and applied to a coating oven device;

[0066] Fig.15 for Fig.14 A partial structural schematic diagram of the first fan;

[0067] Fig.16 A module diagram of a battery production system provided for some embodiments of the present application.

[0068] Description of Figure Numbers:

[0069] 1-coating oven device, 10-box, 11-air flow channel, 110-air inlet, 111-air outlet, 112-first arc channel, 1120-inner air outlet channel, 1121-outer air outlet channel, 113-second arc channel, 1130-inner air inlet channel, 1131-outer air inlet channel, 114-first guide plate, 115-second guide plate, 116-first NMP concentration detection element, 117-second NMP concentration detection element, 118-first vertical channel, 12-belt walking channel, 120-pole piece inlet, 121-pole piece outlet, 123 -negative pressure chamber, 13-avoidance hole, 20-first fan, 21-housing, 210-flow channel, 211-air inlet, 212-air outlet, 213-first arc surface, 214-second arc surface, 215-adjusting member, 22-impeller, 220-impeller segment, 23-motor, 230-drive shaft, 24-magnetic wheel, 240-active magnetic wheel, 241-driven magnetic wheel, 25-rotating shaft, 250-rotating shaft protective cover, 26-sealing member, 261-first sealing ring, 262-second sealing ring, 27-bladeless fan, 28-impeller protective cover, 281-ventilation hole, 29-annular shell, 291-gap, 292-long side wall, 2920-inner wall, 2921-outer wall, 293-short side wall, 2923-first arc portion, 2924-second arc portion, 30-support roller, 40-infrared component, 41-infrared lampshade, 411-guiding channel, 50-cooling component, 51-inlet pipe, 52-outlet pipe, 520-first outlet branch, 521-second outlet branch, 53-spare pipe, 54-valve, 55-second fan, 60-condensation recovery component, 61-first end, 62-second end, 63-third end, 64-purification wheel, 70-first heat exchanger, 71-second heat exchanger, 72-filter, 73-auxiliary heater, 200-pole, 80-bracket, 81-base, 810-second hollow part, 82-lamp cover seat, 820-first hollow part, 83-adjusting bolt, 84-second temperature measuring element, 85-infrared detection bracket, 86-support rod, 91-lifting screw, 92-lifting nut, 1000-battery production system, 2-pole coating device, 2000-blowing assembly, X-first direction, Y-third direction, Z-second direction. DETAILED DESCRIPTION

[0070] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0071] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally also includes steps or units that are not listed, or optionally also includes other steps or units inherent to these processes, methods, products or devices.

[0072] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0073] In the description of the embodiments of the present application, the technical terms "first", "second", "third", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two (including two), such as two, three, etc., unless otherwise clearly and specifically defined. Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0074] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0075] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or position relationship between the components in a certain specific posture (as shown in the drawings) based on the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0076] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like 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 an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0077] Pole sheet drying is a key step in the manufacturing process of lithium-ion batteries. Its purpose is to remove the solvent in the pole sheet and form an electrode structure with good electrochemical properties. The pole sheet drying process is generally completed in an oven. However, due to the presence of many fans inside the oven, the internal flow field will be uneven. Especially during the drying process of the positive pole sheet, there are flammable and explosive evaporated solvent gases inside the oven. For example, N-methylpyrrolidone (NMP) is miscible with water and is also easily soluble in most organic solvents such as ether and acetone. It will explode when the lower limit of the explosive concentration is 1.3%vol. It is toxic and can enter the human body through inhalation, ingestion, percutaneous absorption, etc., causing poisoning. Therefore, it is necessary to control the uniform distribution of the wind field in the oven to reduce the situation where the local evaporated solvent gas exceeds the standard.

[0078] After research, it was found that the coating oven device in the relevant technology has the following problems: the air inlet of the coating oven device is located in the middle of the box, which may produce a certain impact force on the electrode, causing the electrode to shake up and down during the transfer process, and the introduced air flows to both sides, causing the local airflow to be too strong or too weak, thereby affecting the consistency of the drying effect.

[0079] In order to solve the above problems, the present application provides a coating oven device including a box body and multiple first fans; at least some of the first fans are arranged in the box body; wherein the first fan is a bladeless first fan; the first fan includes a motor, a magnetic wheel and a blowing assembly; wherein the magnetic wheel is connected to the motor; the blowing assembly is connected to the motor through the magnetic wheel; a bladeless fan is connected to the blowing assembly; wherein the blowing assembly is used to blow air to the bladeless fan.

[0080] In the present embodiment, by applying the first bladeless fan to the coating oven device, compared with the conventional fan, the air volume it provides is larger and more energy-saving; and the first bladeless fan is arranged in the box body, which also breaks the high horizontal wind speed area formed by the large air volume above the lampshade, promotes the mixing of gas and solvent, and brings the mixed gas to the upper part of the box body and discharges it, thereby more efficiently reducing the solvent concentration on the surface of the pole piece; in addition, since the inside of the oven may contain a large amount of flammable and explosive solvent gas, the magnetic wheel can achieve contactless transmission through the setting of the magnetic wheel. Compared with the related technology using coupling transmission, this embodiment can reduce the risk of sparks caused by friction and causing explosion.

[0081] The present application is described in detail below with reference to the accompanying drawings and embodiments.

[0082] See also Figure 1 and Figure 2 , Figure 1 A schematic diagram of the structure of a coating oven device 1 provided in some embodiments of the present application; Figure 2 for Figure 1 Schematic diagram of the structure of a partial box body 10 of the coating oven device 1.

[0083] The coating oven device 1 in some embodiments of the present application includes a housing 10 and a plurality of infrared components 40, wherein the interior of the housing 10 has an air flow channel 11 and a tape channel 12 that are interconnected, and the plurality of infrared components 40 are arranged in the tape channel 12 at intervals along a first direction; wherein the air flow channel 11 is located above the tape channel 12; the tape channel 12 has a relative electrode inlet 120 and a electrode outlet 121 along the first direction; the air flow channel 11 has an air inlet 110 at one end close to the electrode outlet 121, and has an air outlet 111 at one end close to the electrode inlet 120.

[0084] The box 10 is used to accommodate the electrode and provide a controllable temperature, humidity and vacuum environment for drying the electrode. The box 10 is made of high temperature resistant and corrosion resistant materials, such as carbon steel or stainless steel.

[0085] The belt conveyor 12 refers to a channel for accommodating and transporting electrodes. The belt conveyor 12 has an electrode inlet 120 and an electrode outlet 121 relative to each other along the first direction; wherein the electrode inlet 120 refers to the position where the electrode to be dried enters the belt conveyor 12, and the electrode outlet 121 refers to the position where the electrode after drying leaves the belt conveyor 12, that is, the electrode is loaded from the electrode inlet 120, and unloaded through the electrode outlet 121 after drying in the box 10. The first direction is the horizontal direction of the coating oven device 1 during normal installation operation, that is, Figure 1 and Figure 2 In the X direction, the electrode pieces flow in the belt channel 12 along the X direction. The wound long electrode pieces can continuously pass through the belt channel 12; multiple short electrode pieces can enter the belt channel 12 in sequence through the conveyor belt at a certain time interval to achieve drying of different electrode pieces.

[0086] The airflow channel 11 provides a channel for the flow of wind and heat, and is located above the belt conveyor channel 12, that is, when the coating oven device 1 is normally installed and operated, the airflow channel 11 is located above the belt conveyor channel 12. Furthermore, in some embodiments, the airflow channel 11 is located at the top of the interior of the box 10, that is, the airflow channel 11 is located near the top wall inside the box 10. The airflow channel 11 has an air inlet 110 at one end close to the pole piece outlet 121, and an air outlet 111 at one end close to the pole piece inlet 120; wherein, the air inlet 110 is the position where the outside air enters the box 10; the air outlet 111 is the position where the air mixed with the solvent evaporated from the pole piece is discharged from the box 10; the airflow in the airflow channel 11 flows in the opposite direction of X, that is, the airflow direction is opposite to the pole piece transmission direction, which can improve the mixing efficiency of the airflow channel 11 with the solvent gas released on the pole piece surface, improve the drying effect of the pole piece, and reduce the solvent residue. It can be understood that the solvent content in the air near the air inlet 110 is less, and the electrode is about to be discharged from the electrode outlet 121 after drying. The air inlet 110 and the electrode outlet 121 are located on the same side, so that there is less solvent after the electrode outlet 121 is discharged, thereby improving the electrode yield. In some embodiments of the present application, the air flow channel 11 can span multiple sections of the box 10, for example, 6 sections, and 12 infrared components 40 and 6 first fans 20 can be set in each section of the box 10.

[0087] The infrared component 40 may include one or more infrared lamps. The infrared component 40 emits infrared light to irradiate the coating electrode, and uses the thermal effect of the infrared light to quickly heat the electrode, thereby promoting the evaporation of the solvent, thereby achieving a drying effect. Multiple infrared components 40 are arranged in the belt path 12 at intervals along the X direction. In the embodiment of the present application, the second direction is the vertical direction of the coating oven device 1 during normal installation operation, that is, Figure 1 and Figure 2The temperature of the infrared component 40 will increase during operation, and the first fan 20 can also cool down the infrared component 40. Along the second direction, the airflow channel 11 and the belt conveyor channel 12 are located on opposite sides of the plurality of first fans 20, which is conducive to the mixing of the fresh air (gas with a low solvent content) on the airflow channel 11 and the gas with a high solvent content on the belt conveyor channel 12.

[0088] In this embodiment, since the airflow channel 11 is located above the tape transport channel 12, the electrode jitter can be reduced; and, the airflow channel 11 is only provided above the box body 10, which can simplify the pipeline layout at the bottom of the box body 10 and facilitate the later maintenance of the pipeline; and since the tape transport channel 12 has a relative electrode inlet 120 and a electrode outlet 121 along the first direction; the airflow channel 11 has an air inlet 110 at one end close to the electrode outlet 121, and an air outlet 111 at one end close to the electrode inlet 120, that is, the airflow direction is opposite to the electrode transmission direction, which can improve the drying effect of the electrode and reduce solvent residue; the infrared component 40 emits infrared light to irradiate the coated electrode, and uses the thermal effect of the infrared light to quickly heat the electrode, thereby promoting the evaporation of the solvent, thereby achieving a drying effect.

[0089] Please continue to see Figure 1 and Figure 2 In some embodiments, the air inlet 110 and the air outlet 111 are bent away from the tape path 12 and form an arc-shaped channel at the corner.

[0090] Since the air flow channel 11 is located above the tape path 12, the air inlet 110 is bent toward the side away from the tape path 12, that is, the air inlet 110 is bent upward. The arc channel includes a first arc channel 112 and a second arc channel 113, wherein the air inlet 110 is bent toward the side away from the tape path 12 to form the first arc channel 112, which allows the gas to flow into the box body 10 in a more moderate and dispersed manner, which can reduce the gas directly rushing into the box body 10 and improve the smoothness of the air flow.

[0091] Since the air flow channel 11 is located above the tape path 12, the air outlet 111 is bent toward the side away from the tape path 12, that is, the air outlet 111 is bent upward. The air outlet 111 is bent toward the side away from the tape path 12 to form a second arc channel 113, which helps to smoothly discharge the waste gas in the box 10 that has participated in the drying process, has a large solvent content and has a lower temperature, reduces turbulence caused by the too hard corner of the channel when the waste gas is discharged, and can also reduce the residual solvent (such as NMP) gas at the corner.

[0092] Therefore, in this embodiment, since the air inlet 110 and the air outlet 111 are bent away from the tape path 12 and form an arc-shaped channel at the corner, this can reduce the direct impact of gas on the box body 10, improve the smoothness of the air flow, and reduce the residual solvent (such as NMP) gas at the corner.

[0093] In some embodiments, a first guide plate 114 is disposed in the first arc-shaped channel 112 of the air outlet 111 , and the first guide plate 114 divides the first arc-shaped channel 112 of the air outlet 111 into an inner air outlet channel 1120 and an outer air outlet channel 1121 .

[0094] The guide plate (including the first guide plate 114 and the second guide plate 115 described below) refers to a structure for changing the direction of airflow that is processed into a desired shape according to the air duct design and airflow requirements of the box body 10. In this embodiment, since the first guide plate 114 is arranged in the first arc-shaped channel 112 of the air outlet 111, the first arc-shaped channel 112 of the air outlet 111 is divided into an inner air outlet channel 1120 and an outer air outlet channel 1121, the probability of generating vortices can be reduced, thereby reducing the residual solvent (such as NMP) gas at the corners, so that the solvent gas is mixed more evenly.

[0095] Optionally, in some embodiments, the first guide plate 114 is arc-shaped, and the position of the first guide plate 114 is adjustable, so that the width ratio of the inner air outlet channel 1120 and the outer air outlet channel 1121 of the air outlet 111 is adjustable.

[0096] Specifically, the first guide plate 114 is a curved plate with a certain curvature, and the curvature of the first guide plate 114 can be adapted to the curvature of the air outlet 111 that is bent away from the tape path 12 and forms the first curved channel 112 at the corner. The position of the first guide plate 114 is adjustable, which means that the first guide plate 114 can be moved along the width direction of the first curved channel 112 of the air outlet 111, so that the width ratio of the inner air outlet channel 1120 and the outer air outlet channel 1121 of the air outlet 111 can be adjusted. In this way, the width ratio of the inner air outlet channel 1120 and the outer air outlet channel 1121 can correspond to the width ratio of the inner air inlet channel 1130 and the outer air inlet channel 1131, which is conducive to the overall air flow stability.

[0097] Optionally, in some embodiments, a second guide plate 115 is also provided in the second curved channel 113 of the air inlet 110, and the second guide plate 115 divides the second curved channel 113 of the air inlet 110 into an inner air inlet channel 1130 and an outer air inlet channel 1131; the position of the second guide plate 115 is adjustable, so that the width ratio of the inner air inlet channel 1130 and the outer air inlet channel 1131 of the air inlet 110 is adjustable.

[0098] The second guide plate 115 is similar to the first guide plate 114. The second guide plate 115 is positionally adjustable, which means that the second guide plate 115 can move along the width direction of the second arc-shaped channel 113 of the air inlet 110, so that the width ratio of the inner air inlet channel 1130 and the outer air inlet channel 1131 of the air inlet 110 can be adjusted. In this way, the airflow velocity in the inner air inlet channel 1130 and the outer air inlet channel 1131 can be adjusted, thereby adjusting the thickness ratio and velocity of the upper and lower airflows in the airflow channel 11.

[0099] Further, in some embodiments, please continue to refer to Figure 2 A first NMP concentration detection element 116 is provided in the tape path 12; see Figure 1 A second NMP concentration detection element 117 is disposed in the gas outlet 111 .

[0100] The NMP concentration detection element is used to detect the concentration of NMP, and may be an electrochemical detection element, an infrared absorption detection element or a photoionization detection element.

[0101] Among them, the concentration of NMP in the tape channel is relatively high, and the first NMP concentration detection element 116 is used to monitor the concentration of NMP in the tape channel 12 in real time to reduce the risk of explosion caused by excessive concentration of NMP in the box 10; the second NMP concentration detection element 117 is used to monitor the concentration of NMP in the exhaust gas after drying the electrode in real time. In this way, the concentration of NMP can be monitored in real time and early warning can be given in time. When the concentration of NMP in the coating oven device 1 is too high, the air volume can be increased to control the concentration of NMP.

[0102] Optionally, in some embodiments, the air outlet 111 is bent toward a side away from the tape path 12 to form a first vertical channel 118, the second NMP concentration detection element 117 is disposed in the first vertical channel 118, and the vertical distance h between the second NMP concentration detection element 117 and the central axis of the air flow channel 11 is 2.5 meters to 4 meters.

[0103] The direction of the first vertical channel 118 is along the second direction, and the second direction is the vertical direction of the coating oven device 1 during normal installation and operation, that is, Figure 1 and Figure 2 In the Z direction, the second NMP concentration detection element 117 can be inserted in the first vertical channel 118, and the vertical distance h between the second NMP concentration detection element 117 and the central axis of the air flow channel 11 is 2.5 meters to 4 meters, for example, 2.5 meters, 3 meters, 3.5 meters or 4 meters. At this position, the NMP is mixed relatively evenly, and the detection result is more accurate.

[0104] Furthermore, in some embodiments, the coating oven device 1 also includes a plurality of first fans 20, and the plurality of first fans 20 are arranged at intervals along the first direction; each first fan 20 is at least partially located in the box body 10; wherein, a plurality of air flow channels 11 are formed between the plurality of first fans 20 and the top wall of the box body 10, and the first fans 20 are used to blow the gas in the air flow channel 11 toward the belt conveyor 12; and a belt conveyor 12 is provided on the side of the plurality of first fans 20 away from the air flow channel 11.

[0105] Among them, the first fan 20 is used to provide air circulation. In some embodiments, the working principle of the first fan 20 is to drive the impeller to rotate through a power device such as an electric motor. The impeller exerts a force on the gas during the rotation process, so that the gas obtains energy, thereby generating a pressure difference, pushing the gas to enter from the air inlet 211, and after being accelerated and pressurized by the impeller, it is discharged from the air outlet to achieve gas transportation and pressure increase. The first fan 20 can be a centrifugal fan, an axial flow fan, or a mixed flow fan. The first fan 20 in the embodiment of the present application can be a cross-flow fan (also known as a cross-flow fan).

[0106] A plurality of first fans 20 are arranged at intervals along the first direction, that is, a plurality of first fans 20 are arranged at intervals along the X direction. In some embodiments, the housing 10 includes a plurality of housings 10, and six first fans 20 may be arranged in each housing 10, and the six first fans 20 are arranged at intervals along the X direction. Each first fan 20 is at least partially located in the housing 10, that is, the main body of the first fan 20 is located in the housing 10, so as to improve the fluidity of the gas in the housing 10. There is a gap between the multiple first fans 20 and the top wall of the box 10, so as to form an airflow channel 11. The first fans 20 are used to blow the gas in the airflow channel 11 to the tape channel 12, so that the airflow with a higher NMP concentration in the tape channel 12 can be mixed with the airflow with a lower NMP concentration in the airflow channel 11. The adjacent first fans 20 are arranged at intervals and space is left, so that the fresh air (gas with a low solvent content) introduced to the surface of the pole piece by the first fans 20 can carry the gas with a higher concentration of solvent (NMP) into the airflow channel 11 above the box 10 with a high flow rate, so as to be directly discharged from the box 10. The side of the multiple first fans 20 away from the airflow channel 11 has the tape channel 12, that is, the multiple first fans 20 separate the airflow channel 11 from the tape channel 12, and the airflow channel 11 and the tape channel 12 are connected through the gaps between the adjacent first fans 20; and the first fans 20 are located above the pole piece.

[0107] Since the air inlet 110 is located above the box 10, the fresh air is in the top space of the box 10, and the NMP gas after the electrode is dried is accumulated on the surface of the electrode, so that the NMP concentration near the surface of the electrode is higher; and the first fan 20 blows air from top to bottom, so that the fresh air disturbs the flow field in the belt conveyor channel 12, and can carry the air with a high NMP concentration in the belt conveyor channel 12 into the air flow channel 11 above the box 10. In addition, during the operation of the electrode, due to the internal flow field problem, the electrode will shake upward and fall off the roller, and the first fan 20 blows air downward, increasing the air volume to press the electrode, thereby improving the shaking problem of the electrode.

[0108] In the present embodiment, a plurality of first fans 20 are arranged, and the plurality of first fans 20 are arranged at intervals along the first direction; each first fan 20 is at least partially located in the box body 10; wherein a plurality of air flow channels 11 are formed between the plurality of first fans 20 and the top wall of the box body 10, and the first fans 20 are used to blow the gas in the air flow channel 11 to the belt conveyor 12; a plurality of first fans 20 have a belt conveyor 12 on the side away from the air flow channel 11, so that the large air volume provided by the first fans 20 can have more space to be discharged to the air outlet 111 at the upper part of the oven; the first fans 20 can disperse the gas with a higher solvent content in the belt conveyor 12, mix it with the gas with a lower solvent content, and flow it into the air flow channel 11, thereby further reducing the solvent content on the surface of the electrode; the air outlet of the first fans 20 can suppress the electrode and reduce the shaking of the electrode.

[0109] Further, in some embodiments, please continue to refer to Figure 1 and Figure 2 The coating oven device 1 also includes a plurality of support rollers 30, which are arranged in the belt conveying channel 12 at intervals along the first direction; wherein, along the second direction, a plurality of infrared components 40 are arranged between the plurality of support rollers 30 and the plurality of first fans 20; and the second direction intersects with the first direction.

[0110] The support roller 30 is used to support and guide the pole piece, maintain the flatness of the pole piece during the drying process, and reduce shaking and deformation. In some embodiments, the support roller 30 can be cylindrical or double-tapered, which can alleviate the rolling bearing capacity of the roller edge and extend the service life of the support roller 30. It can be made of metal materials, such as carbon steel, alloy steel, etc., to provide suitable strength and hardness to withstand pressure and friction.

[0111] In the embodiment of the present application, along the second direction, the plurality of infrared components 40 are disposed between the plurality of support rollers 30 and the plurality of first fans 20 , that is, the heights of the plurality of support rollers 30 , the plurality of infrared components 40 and the plurality of first fans 20 are increased gradually.

[0112] In this embodiment, multiple support rollers 30 and multiple infrared components 40 are arranged, and the multiple support rollers 30 are arranged in the tape walkway 12 at intervals along the first direction; the multiple infrared components 40 are arranged in the tape walkway 12 at intervals along the first direction; along the second direction, the multiple infrared components 40 are arranged between the multiple support rollers 30 and the multiple first fans 20; the second direction intersects with the first direction, wherein the wind blown out by the first fan 20 can pass through at least part of the infrared components 40, mix the gas with low solvent content in the airflow channel 11 with the gas with high solvent content in the tape walkway 12, and flow into the airflow channel 11, further reducing the solvent content on the surface of the pole piece 200, and can press the pole piece 200 on the support rollers to reduce the shaking of the pole piece 200.

[0113] Optionally, in some embodiments, multiple first fans 20 correspond one-to-one to multiple support rollers 30 and are aligned in the second direction; two infrared components 40 are correspondingly arranged for each first fan 20, and the two infrared components 40 are spaced apart on opposite sides of the first fan 20 along the first direction.

[0114] Multiple first fans 20 correspond one-to-one to multiple support rollers 30 and are aligned in the second direction, that is, along the second direction, the projection of each first fan 20 and the corresponding support roller 30 at least partially overlaps, so that the downward air blowing of the first fan 20 can directly reach the corresponding support roller 30.

[0115] The first blower 20 is located above the gap between the two infrared components 40 and arranged at intervals, which can alleviate the problems of low air flow rate and high content of solvent gas (for example, NMP gas) between the two infrared components 40.

[0116] In this embodiment, by arranging a plurality of first fans 20 to correspond to a plurality of support rollers 30 one by one and aligning them in the second direction, the support rollers 30 can support the pole piece at the blowing position of the corresponding first fans 20, thereby reducing the tension caused by the deformation of the pole piece; that is, the blowing of the first fans 20 presses the pole piece onto the support rollers 30. By arranging two infrared components 40 corresponding to each first fan 20, and the two infrared components 40 are arranged at intervals on opposite sides of the first fan 20 along the first direction (X direction), the first fan 20 can blow the first gas with a lower NMP concentration in the airflow channel 11 along the gap between the first fan 20 and the two adjacent infrared components 40 to the belt conveyor 12, thereby driving the second gas with a higher solvent (such as NMP) concentration in the belt conveyor 12 to flow, and then mix with the first gas, thereby improving the ventilation and drying effect; and the phenomenon of the pole piece fluctuating up and down in the airflow channel 11 below the box 10 can also be reduced.

[0117] Please also see Figure 3 , Figure 3This is a schematic structural diagram of the first fan 20 and the infrared lamp cover 41 provided in some embodiments of the present application.

[0118] In some embodiments, the infrared component 40 includes an infrared lamp cover 41; along the first direction, the infrared lamp cover 41 has a guide channel 411 on the side wall close to the first fan 20, and the port at the top of the guide channel 411 is used to introduce part of the airflow blown out by the first fan 20, and the port at the bottom of the guide channel 411 is used to make part of the airflow blown out by the first fan 20 blow to the bottom of the infrared component 40.

[0119] The infrared lamp cover 41 is used to protect the infrared lamp tube ( Figure 3 The infrared lampshade 41 can be made of a quartz glass lampshade, a ceramic lampshade, a metal reflective lampshade, etc.

[0120] Further, along the first direction, the guide channel 411 is only provided on one side of the infrared lamp cover 41 close to the first fan 20, and the port at the top of the guide channel 411 is used to introduce part of the airflow blown out by the first fan 20, and the port at the bottom of the guide channel 411 is used to make part of the airflow blown out by the first fan 20 blow toward the bottom of the infrared component 40. For example, the guide channel 411 is formed by setting the side wall of the infrared lamp cover 41 into a double-layer structure. The port at the bottom of the guide channel 411 can be inclined toward the bottom of the infrared component 40. Optionally, the guide channel 411 can be gradually contracted from the top to the bottom to enhance the wind force or wind speed of the wind outflow to the bottom of the infrared component 40, so as to better disperse the solvent (such as NMP) gas at the bottom of the infrared component 40.

[0121] Specifically, when the air inlet 110 blows air, the first fan 20 will send the air in the upper airflow channel 11 into the lower belt channel 12, reducing the concentration of the solvent (such as NMP) on the surface of the pole piece 200; and a guide channel 411 is set on the side wall of the infrared lamp cover 41 close to the first fan 20, so that the air can flow along the side wall of the infrared lamp cover 41, reducing resistance and increasing fluidity. The solvent (such as NMP) gas in the lower belt channel 12 can enter the upper airflow channel 11 through the space between the first fans 20, and then be discharged through the air outlet 111. In addition, when the overall concentration of the solvent (such as NMP) gas in the box 10 increases, the air intake can also be increased by adjusting the air valve of the air inlet 110, thereby reducing the concentration of the solvent (such as NMP).

[0122] In this embodiment, since the bottom of the infrared component 40 is more likely to accumulate solvent gas (such as NMP gas), resulting in a higher concentration of the solvent there, the infrared lamp cover 41 and the guide channel 411 are arranged so that the port at the top of the guide channel 411 can introduce part of the airflow blown out by the first fan 20, and the port at the bottom of the guide channel 411 can blow part of the airflow blown out by the first fan 20 to the bottom of the infrared component 40, thereby reducing the solvent concentration below the infrared component 40 and reducing the temperature at the bottom of the infrared component 40.

[0123] In some embodiments, the interior of the box 10 only has an air flow channel 11 disposed above the tape walking channel 12 .

[0124] The inside of the box 10 only has an airflow channel 11 arranged above the tape channel 12, that is, the airflow channel 11 is only arranged above the box 10. This can reduce the phenomenon of the pole piece 200 in the airflow channel 11 fluctuating up and down. It can be understood that if the airflow channel 11 is also arranged below the box 10, that is, there is also an airflow channel 11 below the tape channel 12, the airflow in the airflow channel 11 below the tape channel 12 blows upward, which will cause the pole piece to separate from the support roller 30 and cause up and down fluctuations. It can be understood that the bottom of the box 10, that is, the space inside the box 10 close to the bottom wall of the box 10 when the coating oven device 1 is in use.

[0125] Optionally, see Figure 4 , Figure 4 A schematic diagram of the flow channel of the housing 21 of the first fan 20 provided in some embodiments of the present application. In some embodiments, the first fan 20 includes a housing 21 and an impeller 22, the housing 21 is disposed in the housing 10; the housing 21 has a flow channel 210 inside; the impeller 22 is disposed in the flow channel 210; wherein the circle where the arc surface of the inner surface of the flow channel 210 is located is eccentrically arranged relative to the circle where the impeller 22 is located.

[0126] Specifically, the housing 21 is used to form an airflow through the flow channel 210, and the airflow through the flow channel 210 is used to accommodate the impeller 22 and guide the airflow through the flow channel 210. The impeller 22 is used to drive the air, and cooperates with the housing 21 so that the still air can be transmitted along the flow channel 210, and the air enters from one side and exits from the other side. In some embodiments, the impeller 22 includes blades, and the blades are curved and used to do work on the air, wherein the number, shape and angle of the blades can be designed according to different application requirements. Further, in some embodiments, the installation angle and diameter of the blades form a negative angle of attack, and when the blades rotate, air can be blown inwardly, that is, the air is squeezed downward, so that the air flows along the surface of the blades. When the air leaves the blades, the thrust is lost, the tangential velocity decays, and it moves toward the center along an arc, thereby forming a vortex.

[0127] The circle where the arc-shaped surface of the inner surface of the flow channel 210 is located is eccentrically set relative to the circle where the impeller 22 is located. In this way, the vortex formed in the flow channel 210 cooperates with the eccentrically set shell, and the vortex will deviate from the center toward the air outlet. At this time, the vortex drives the surrounding air to form a through flow, so that the air is blown out from the lower outlet along the flow channel 210 in a directional manner, which promotes the mixing of gas and solvent, and brings the mixed gas to the airflow channel 11 and discharges it, thereby reducing the solvent concentration on the surface of the pole piece 200.

[0128] In some embodiments, the flow channel 210 has an air inlet 211 and an air outlet 212 , and an adjusting member 215 is disposed on the side wall of the air outlet 212 ; the adjusting member 215 can move relative to the side wall of the air outlet 212 to adjust the opening of the air outlet 212 .

[0129] The adjusting member 215 may be a plate-like structure inserted from the side wall of the air outlet 212, and can move relative to the side wall of the air outlet 212, so as to adjust the opening of the air outlet 212. Furthermore, in some embodiments, the adjusting member 215 extends from the outside of the air outlet 212 through the side wall of the air outlet 212 to the inside of the air outlet 212. The opening of the air outlet 212 refers to the size of the opening of the air outlet 212 when the air outlet 212 is in the open state, which affects the air volume and air flow direction of the outlet. In the embodiment of the present application, the opening of the air outlet 212 can be freely adjusted to 30-60 degrees.

[0130] Since the slurries, solvents and drying conditions of the pole pieces 200 of different batteries are different, the outlet air volume can be adjusted as needed by adjusting the opening of the air outlet 212 to meet the drying requirements of different pole pieces 200.

[0131] Since the flow channel 210 has an air inlet 211 and an air outlet 212, the arc surface of the inner surface of the flow channel 210 can be divided into at least two arc surfaces. Optionally, in some embodiments, the arc surface of the inner surface of the flow channel 210 includes a first arc surface 213 and a second arc surface 214 opposite to each other, and the circle where the first arc surface 213 and the circle where the second arc surface 214 are located are both eccentrically arranged relative to the circle where the impeller 22 is located; along the direction from the air inlet 211 to the air outlet 212, the eccentric direction of the circle where the first arc surface 213 is located relative to the circle where the impeller 22 is located is opposite to the eccentric direction of the circle where the second arc surface 214 is located relative to the circle where the impeller 22 is located.

[0132] The first curved surface 213 and the second curved surface 214 arranged opposite to each other form the flow channel 210. In some embodiments, the first curved surface 213 and the second curved surface 214 at the air inlet 211 can be flush along the first direction, and the first curved surface 213 and the second curved surface 214 at the air outlet 212 can also be flush along the first direction. The circle where the first curved surface 213 is located is different from the circle where the second curved surface 214 is located, and is eccentrically arranged relative to the circle where the impeller 22 is located. Along the direction from the air inlet 211 to the air outlet 212, the eccentric direction of the circle where the first curved surface 213 is located relative to the circle where the impeller 22 is located is opposite to the eccentric direction of the circle where the second curved surface 214 is located relative to the circle where the impeller 22 is located, which further optimizes the flow path of the airflow and makes the airflow more evenly distributed in the flow channel 210.

[0133] In some embodiments, the housing 21 and the impeller 22 are both made of aluminum alloy, and the inner surface of the housing 21 and the outer surface of the impeller 22 both have a flexible covering layer.

[0134] Since there may be a large amount of flammable and explosive solvent gas in the box 10, for example, when the positive electrode plate 200 is dried, there is a large amount of NMP gas in the box 10. When the component materials of the first fan 20 have the possibility of friction and fire during relative movement, it may induce an explosion and cause danger. Therefore, the housing 21 and the impeller 22 of the first fan 20 are made of aluminum alloy. The aluminum alloy has a low friction coefficient and can reduce the sparks caused by friction. At the same time, it has good electrical conductivity and thermal conductivity, and can quickly dissipate the heat generated by friction, reducing the risk of fire. The flexible covering layer can be a rubber sleeve. The rubber sleeve is made of a material with high temperature resistance and chemical stability such as fluororubber, which can also reduce the risk of fire caused by friction or chemical reactions.

[0135] In this embodiment, the casing 21 and the impeller 22 are made of aluminum alloy, and the inner surface of the casing 21 and the outer surface of the impeller 22 are both provided with a flexible covering layer, so that the occurrence of fire can be reduced.

[0136] Further, in some embodiments, see Figure 5 and Figure 6 ,in, Figure 5 A schematic diagram of the three-dimensional structure of the first fan 20 provided in some other embodiments of the present application; Figure 6 A schematic structural diagram of the assembly of the first fan 20 and the housing 10 provided in some embodiments.

[0137] In some embodiments, the first fan 20 also includes a motor 23, a magnetic wheel 24 and a rotating shaft 25; the magnetic wheel 24 is connected to the motor 23, one end of the rotating shaft 25 is connected to the magnetic wheel 24, and the other end is arranged in the flow channel 210, and the impeller 22 is installed on the rotating shaft 25.

[0138] The motor 23 is used to provide torque to convert electrical energy into mechanical energy. In some embodiments of the present application, the motor 23 can be an explosion-proof motor 23 with a special sealing and insulation design to improve the stability of the entire drying process.

[0139] The magnetic wheel 24 connects the motor 23 and the rotating shaft 25 for transmission. The magnetic wheel 24 utilizes the repulsion of like poles and the attraction of opposite poles to convert the repulsion into a driving force. Specifically, the magnetic wheel 24 includes an active magnetic wheel 240 and a driven magnetic wheel 241. The active magnetic wheel 240 is connected to the motor 23, and the driven magnetic wheel 241 is connected to the rotating shaft 25. Permanent magnets or electromagnets are installed on both the active magnetic wheel 240 and the driven magnetic wheel 241. In a stationary state, the S and N poles of the active magnetic wheel 240 and the driven magnetic wheel 241 correspond to each other. When the active magnetic wheel 240 rotates under the drive of the motor 23, the rotating magnetic field generated by it will interact with the magnetic field of the driven magnetic wheel 241, and the like magnetic poles repel each other and the opposite magnetic poles attract each other, thereby driving the driven magnetic wheel 241 to rotate synchronously, realizing contactless transmission of power, and reducing the risk of friction and slipping during use.

[0140] In this embodiment, since the first fan 20 includes a motor 23, a magnetic wheel 24 and a rotating shaft 25, wherein the magnetic wheel 24 can achieve non-contact transmission, when there is a large amount of flammable and explosive solvent gas in the oven, the magnetic wheel 24 can reduce the risk of explosion caused by the vibration of the impeller 22 caused by the coaxiality error and the friction of the coupling causing sparks when the coupling is used in the traditional transmission.

[0141] Optionally, in some embodiments, please continue to refer to Figure 6 The motor 23 is arranged outside the box body 10, and the magnetic wheel 24 is arranged inside the box body 10; the side wall of the box body 10 has an avoidance hole 13, the driving shaft 230 of the motor 23 passes through the avoidance hole 13 and is connected to the magnetic wheel 24, and a sealing member 26 is provided between the driving shaft 230 of the motor 23 and the hole wall of the avoidance hole 13.

[0142] Since the motor 23 is arranged outside the box body 10 and the magnetic wheel 24 is arranged inside the box body 10, the side wall of the box body 10 needs to have an avoidance hole 13 so that the driving shaft 230 of the motor 23 can pass through the avoidance hole 13 and connect with the magnetic wheel 24. In this case, there is a gap between the driving shaft 230 of the motor 23 and the hole wall of the avoidance hole 13, so there is a risk of gas leakage in the box body 10.

[0143] The seal 26 is a component made of a material with elasticity and sealing performance, such as a rubber seal, a polytetrafluoroethylene seal or a silicone seal, etc., which is used to fill the gap between the drive shaft 230 and the avoidance hole 13 to form a sealing structure. Furthermore, the seal 26 can also reduce the risk of explosion caused by sparks generated between the drive shaft 230 of the motor 23 and the avoidance hole 13.

[0144] Optionally, in some embodiments, the seal 26 further extends to the inner surface of the side wall of the box body 10. Specifically, the seal 26 includes a first seal ring 261 and a second seal ring 262, wherein the inner diameter of the first seal ring 261 is smaller than the inner diameter of the second seal ring 262, the first seal ring 261 fills the gap between the drive shaft 230 and the avoidance hole 13, and the second seal ring 262 fits the inner surface of the side wall of the box body 10, thereby further improving the sealing performance.

[0145] In this embodiment, a seal 26 is provided between the drive shaft 230 of the motor 23 and the hole wall of the avoidance hole 13, so as to reduce the risk of solvent gas leakage from the gap between the drive shaft 230 of the motor 23 and the hole wall of the avoidance hole 13 caused by the flow of gas during the operation of the impeller 22.

[0146] Optionally, in some embodiments, a shaft protection cover 250 is provided on the outer cover of the shaft section of the shaft 25 located between the magnetic wheel 24 and the housing 21 ; and one end of the shaft protection cover 250 close to the motor 23 is provided on the outside of the magnetic wheel 24 .

[0147] The shaft protection cover 250 is used to protect the shaft section and the magnetic wheel 24 between the magnetic wheel 24 and the housing 21, and can also reduce the risk of gas leakage. The shaft protection cover 250 can be a hollow cylindrical structure, and the shaft section between the magnetic wheel 24 and the housing 21 is arranged in the hollow area of ​​the shaft protection cover 250.

[0148] In this embodiment, a shaft protection cover 250 is provided on the outside of the shaft section of the shaft 25 between the magnetic wheel 24 and the shell 21; the shaft protection cover 250 is provided on the outside of the magnetic wheel 24 at one end close to the motor 23, so as to protect the shaft section between the magnetic wheel 24 and the shell 21 and the magnetic wheel 24, and at the same time, the risk of gas leakage can be reduced.

[0149] Optionally, see Figure 6 In some embodiments, the first fan 20 includes not only a housing 21 and an impeller 22, but also a motor 23 and a rotating shaft 25; one end of the rotating shaft 25 is connected to the motor 23, and the other end is arranged in the flow channel 210, and the impeller 22 includes a plurality of impeller segments 220; the plurality of impeller segments 220 are installed on the rotating shaft 25 along the axis of the rotating shaft 25.

[0150] The impeller 22 may be a detachable structure, and the lengths of the multiple impeller segments 220 may be set as required without affecting the overall rigidity of the impeller 22. The multiple impeller segments 220 are assembled and mounted on the rotating shaft 25, which can reduce the difficulty of the manufacturing process caused by the impeller 22 being too long. In some embodiments, the width of the housing 10 is relatively long, and the span of the first fan 20 is also correspondingly relatively long. The segmented impeller 22 can better resist various external forces during transportation and installation, reduce the possibility of deformation, and improve the stability and reliability of the impeller 22 in the case of a long span.

[0151] In this embodiment, by configuring the impeller 22 to include a plurality of impeller segments 220 , and the plurality of impeller segments 220 are installed on the rotating shaft 25 along the axis of the rotating shaft 25 , the difficulty of the manufacturing process caused by the impeller 22 being too long can be reduced.

[0152] Further, in some embodiments, please continue to refer to Figure 4 , the distance between the inner surface of the flow channel 210 and the impeller 22 is 2.5 mm to 4 mm. In this way, the probability of sparks caused by collision can be reduced, and the first fan 20 can have a certain air output strength. If the distance between the inner surface of the flow channel 210 and the impeller 22 is too small (for example, less than 2.5 mm), the risk of sparks caused by collision will increase, and if the distance between the inner surface of the flow channel 210 and the impeller 22 is too large (for example, greater than 4 mm), the air output strength of the first fan 20 will be too small.

[0153] In some embodiments, see Figure 1 and Figure 2 The box body 10 has a relative pole piece inlet 120 and a pole piece outlet 121 along the first direction; a plurality of first fans 20 are arranged at intervals along the first direction; an air flow channel 11 is formed between the plurality of first fans 20 and the top wall of the box body 10, and the air flow channel 11 has an air inlet 110 at one end close to the pole piece outlet 121, and an air outlet 111 at one end close to the pole piece inlet 120.

[0154] Among them, an airflow channel 11 is formed between the first fan 20 and the top wall of the box body 10. Therefore, the first fan 20 is arranged above the tape walkway 12. The first fan 20 can blow air from the upper airflow channel 11 to the lower tape walkway 12, driving the airflow channel 11 and the gas to mix with the gas flow of the tape walkway 12. In some embodiments, the moving speed of the pole piece 200 on the tape walkway 12 is greater than 100 meters per minute, and the pole piece 200 is prone to ups and downs. The upper airflow channel 11 of the first fan 20 blows air to the lower tape walkway 12, which can press the pole piece 200 on the support roller 30, reduce the shaking of the pole piece 200, and improve the quality of the pole piece 200.

[0155] In this embodiment, the first fan 20 can blow air from top to bottom, which can suppress the pole piece 200 and reduce the shaking of the pole piece 200; it is beneficial for the fresh air to disrupt the flow field of the belt conveyor channel 12, and can carry the gas with a higher concentration of solvent (for example, NMP) on the surface of the pole piece 200 into the air flow channel 11 of the box 10.

[0156] Further, in some embodiments, the coating oven device 1 also includes a plurality of support rollers 30 and a plurality of infrared components 40; the plurality of support rollers 30 are arranged in the tape walkway 12 at intervals along the first direction; the plurality of infrared components 40 are arranged in the tape walkway 12 at intervals along the first direction; wherein, along the second direction, the plurality of infrared components 40 are arranged between the plurality of support rollers 30 and the plurality of first fans 20; the second direction intersects with the first direction; along the second direction, the airflow channel 11 and the tape walkway 12 are located on opposite sides of the plurality of first fans 20.

[0157] In this way, on the one hand, the infrared component 40 can heat and dry the electrode piece 200, which is beneficial to the drying of the electrode piece 200. On the other hand, the wind blown out by the first fan 20 can mix the gas with low solvent content in the air flow channel 11 with the gas with high solvent content in the belt conveyor channel 12, thereby further improving the drying efficiency. The electrode piece 200 can also be pressed on the supporting roller 30 to reduce the shaking of the electrode piece 200.

[0158] Optionally, please also see Figure 7 , Figure 7 The schematic diagram of the structure of the coating oven device 1 provided in some other embodiments of the present application. The coating oven device 1 comprises a housing 10, an infrared component 40 and a cooling component 50, wherein at least part of the infrared component 40 is disposed in the housing 10; the cooling component 50 comprises an air inlet duct 51 and an air outlet duct 52; both the air inlet duct 51 and the air outlet duct 52 are connected to the inside of the infrared component 40.

[0159] The structures of the housing 10 and the infrared component 40 are similar to those of the above-mentioned embodiments and will not be described in detail here. The cooling component 50 is used to adjust the temperature of the infrared component 40 to reduce the risk of explosion of the internal solvent (such as NMP) gas due to overheating of the infrared component 40. In some embodiments, the cooling component 50 is arranged at the bottom or below of the housing 10, and there is no air flow channel 11 at the bottom or below of the housing 10. The bottom of the housing 10 is the side of the housing 10 close to the bottom surface when the coating oven device 1 is in use.

[0160] The cooling assembly 50 can be implemented by a liquid cooling system or an air cooling system. In the liquid cooling system, a liquid (usually water or coolant) is circulated in a cooling plate or pipe to absorb heat and transfer it to an external cooling device. The liquid cooling system is suitable for occasions where high heat is generated and precise temperature control is required. The air cooling system uses a fan or blower to blow air over the heat source to remove the heat. The air cooling system is simple and low cost.

[0161] In some embodiments of the present application, the cooling component 50 is an air cooling system. Specifically, the cooling component 50 can deliver cold air (such as air, etc.) to the inside of the infrared component 40 through the air inlet duct 51. After the cold air enters the infrared component 40, it can take away the excess heat generated by the infrared component 40 when it is working, and then pass through the air outlet duct 52 to maintain the thermal balance and air circulation inside the box 10. Therefore, the air inlet duct 51 delivers cold air, and the gas in the air outlet duct 52 has a higher temperature because it absorbs the heat of the infrared component 40.

[0162] In this embodiment, the coating oven device 1 includes a housing 10, an infrared component 40 and a cooling component 50, at least part of the infrared component 40 is arranged in the housing 10, and the cooling component 50 includes an air inlet duct 51 and an air outlet duct 52; the air inlet duct 51 and the air outlet duct 52 are both connected to the inside of the infrared component 40, so that the housing 10 can accommodate and protect the various components inside, and at the same time provide a relatively closed environment to improve the stability of the drying process; the infrared component 40 can heat and dry the electrode 200, and can also adjust the temperature in the housing 10 as needed to accelerate the drying process; the cooling component 50 can adjust the temperature of the infrared component 40 to reduce the risk of damage to the infrared component 40 due to overheating; it can also reduce the problem of gas in the housing 10 and improve the stability of the coating oven device 1.

[0163] In some embodiments, the housing 10 has a relative pole piece inlet 120 and a pole piece outlet 121 , at least one of the pole piece inlet 120 and the pole piece outlet 121 is provided with a negative pressure chamber 123 , and the first outlet branch 520 of the outlet pipe 52 is connected to the negative pressure chamber 123 .

[0164] The negative pressure chamber 123 is a chamber whose internal pressure is lower than the external atmospheric pressure, and the internal pressure is reduced to prevent a large amount of external cold air from entering the space inside the box 10 through the pole piece inlet 120 and the pole piece outlet 121. The negative pressure chamber 123 can be realized by extracting the gas in the chamber through an exhaust device (such as a vacuum pump), so that the pressure in the chamber is lower than the external atmospheric pressure.

[0165] Optionally, in some embodiments, a negative pressure chamber 123 may be provided at each of the pole piece inlet 120 and the pole piece outlet 121. Taking the setting of the negative pressure chamber 123 at the pole piece inlet 120 as an example, one end of the negative pressure chamber 123 is connected to the side wall of the pole piece inlet 120 and communicates with the pole piece inlet 120, the other end of the negative pressure chamber may be connected to the first air outlet branch 520, and the third end of the negative pressure chamber 123 may be connected to another pipeline, which is used to transport the gas in the first air outlet branch 520 and the gas in the environment mixed in the negative pressure chamber 123 to the cooling component 50.

[0166] The first outlet branch 520 of the outlet pipe 52 is used to transport part of the high-temperature gas in the outlet pipe 52. The outlet port of the first outlet branch 520 of the outlet pipe 52 can be connected to the negative pressure chamber 123 through the pole piece inlet 120. The high-temperature gas entering the negative pressure chamber 123 from the first outlet branch 520 is mixed with the cold air entering the negative pressure chamber 123 from the environment, so that the negative pressure chamber 123 maintains a certain temperature.

[0167] In the present embodiment, a negative pressure chamber 123 is provided at least one of the pole piece inlet 120 and the pole piece outlet 121, and the first outlet branch 520 of the outlet pipe 52 is connected to the negative pressure chamber 123. Part of the high-temperature gas coming out of the cooling infrared component 40 enters the negative pressure chamber 123 through the first outlet branch 520 and mixes with the cold air entering the negative pressure chamber 123 from the pole piece inlet 120 or the pole piece outlet 121. This can increase the temperature of the negative pressure chamber 123, reduce the risk of the cold air sucked into the negative pressure chamber 123 mixing with the high-temperature solvent (such as NMP) gas entering the negative pressure chamber 123 from the pole piece inlet 120 or the pole piece outlet 121 to form condensate, and thereby reduce the condensate (such as NMP) at the pole piece inlet 120 or the pole piece outlet 121.

[0168] Optionally, in some embodiments, the coating oven device 1 also includes a first temperature measuring element (not shown) and a control circuit (not shown); the first temperature measuring element is arranged in the negative pressure chamber 123, and is used to detect the temperature in the negative pressure chamber 123; an air regulating valve (not shown) is arranged on the first air outlet branch 520; the air regulating valve and the first temperature measuring element are both electrically connected to the control circuit; the control circuit is used to control the air regulating valve according to the temperature measurement result of the first temperature measuring element, so as to adjust the air flow on the first air outlet branch 520.

[0169] The first temperature measuring element is a sensor for detecting the temperature in the negative pressure chamber 123, which can convert temperature changes into electrical signals to provide temperature data for subsequent circuit control. The first temperature measuring element can be a thermocouple, a thermistor, a resistance temperature detector (RTD) or an integrated temperature sensor (IC), etc.

[0170] The control circuit is a circuit used to control the working state and operation mode of relevant components in the coating oven device 1. The control circuit can send a control signal to regulate the operation of the relevant components according to the received electrical signal.

[0171] The gas regulating valve is a valve used to adjust the gas flow rate, and the gas flow rate can be controlled by changing the opening of the valve. The gas regulating valve is arranged on the first gas outlet branch 520, and adjusts the gas flow size according to the instruction of the control circuit to maintain the temperature and pressure in the negative pressure chamber 123 stable. It can be understood that if the temperature in the negative pressure chamber 123 is too high, the gas entering the negative pressure chamber 123 through the first gas outlet branch 520 can be reduced; if the temperature in the negative pressure chamber 123 is too low, the gas entering the negative pressure chamber 123 through the first gas outlet branch 520 can be increased.

[0172] In the present embodiment, since the coating oven device 1 further includes a first temperature measuring element and a control circuit, an air regulating valve is provided on the first air outlet branch 520, and the control circuit is used to control the air regulating valve according to the temperature measurement result of the first temperature measuring element to adjust the airflow on the first air outlet branch 520. In this way, the airflow on the first air outlet branch 520 can be dynamically and intelligently adjusted according to the temperature in the negative pressure chamber 123, so that the temperature in the negative pressure chamber 123 is maintained within a suitable and stable range. In this way, the risk of condensation due to excessively low temperature in the negative pressure chamber 123 and the energy required for subsequent condensation recovery due to excessively high temperature in the negative pressure chamber 123 can be reduced while reducing the formation of solvent (such as NMP) condensate at the electrode inlet 120 or the electrode 200.

[0173] In some embodiments, the interior of the housing 10 has an air flow channel 11, and the air flow channel 11 has an air inlet 110 and an air outlet 111; the coating oven device 1 also includes a condensation recovery component 60 and a first heat exchanger 70 arranged outside the housing 10; the first end 61 of the condensation recovery component 60 is connected to the air outlet 111, and the second end 62 is connected to the first heat exchange channel of the first heat exchanger 70 and the air inlet 110 in sequence; the second air outlet branch 521 of the air outlet pipe 52 is connected to the second heat exchange channel of the first heat exchanger 70; wherein, a portion of the gas after passing through the condensation recovery component 60 passes through the first heat exchange channel of the first heat exchanger 70 and exchanges heat with the gas passing through the second heat exchange channel of the first heat exchanger 70, and then enters the air flow channel 11 from the air inlet 110.

[0174] When drying the positive electrode plate 200, in some application scenarios, the positive electrode plate 200 will release flammable and explosive gas solvents, such as NMP gas. If the NMP gas cannot be discharged in time, there will be a risk of explosion. In addition, the NMP gas is also toxic and threatens human health. Therefore, the NMP gas needs to be recovered. The condensation recovery component 60 is used to cool the NMP-rich gas so that the NMP gas condenses and precipitates. The temperature of the gas after passing through the condensation recovery component 60 is reduced.

[0175] The second outlet branch 521 of the outlet pipe 52 is used to transport the remaining high-temperature gas after cooling the infrared component 40. The second outlet branch 521 of the outlet pipe 52 is connected to the second heat exchange channel of the first heat exchanger 70, so that the heat of this part of the high-temperature gas can be recycled and utilized to improve energy utilization.

[0176] The first heat exchanger 70 is a device for transferring heat between fluids (such as gases) at different temperatures. Its working principle is based on heat conduction and convection heat transfer, and heat is transferred from a high-temperature fluid to a low-temperature fluid through a solid wall or medium. In this embodiment, at least part of the low-temperature gas after passing through the condensation recovery component 60 reaches the first heat exchanger 70, and after heat exchange with the high-temperature gas in the second outlet branch 521 from the outlet pipe 52 through the first heat exchanger 70, the temperature rises, and then enters the air flow channel 11 from the air inlet 110 for recycling.

[0177] Furthermore, among the gases in the first gas outlet branch 520, at least part of the low-temperature gas after passing through the condensation recovery component 60 reaches the first heat exchanger 70. After heat exchange with the high-temperature gas in the second gas outlet branch 521 from the gas outlet pipe 52 through the first heat exchanger 70, the temperature is increased, but there may still be a situation where the temperature does not reach the preset temperature. Therefore, in some embodiments, the coating oven device 1 also includes an auxiliary heater 73, which is arranged between the first heat exchanger 70 and the air inlet 110. The auxiliary heater 73 is used to reheat the recovered gas to a preset temperature, and then enter the air flow channel 11 from the air inlet 110 for recycling. Optionally, the gas that enters the air flow channel 11 from the air inlet 110 for recycling may still contain residual solvent. Therefore, in order to further improve reliability, in some embodiments, the coating oven device 1 also includes a filter 72, and the filter 72 is arranged between the first heat exchanger 70 and the auxiliary heater 73 to filter the gas recovered by the condensation recovery component 60 and passed through the first heat exchange channel of the first heat exchanger 70 to remove the solvent for recycling.

[0178] In this embodiment, the gas discharged through the air outlet 111 of the air flow channel 11 contains a relatively high concentration of solvent (such as NMP) and has a relatively high temperature. After passing through the condensation recovery component 60, the solvent is condensed into a liquid and discharged, and the remaining part of the gas is recovered; and the gas in the air outlet pipe 52 that is heated due to the cooling infrared component 40 exchanges heat with the aforementioned condensed and recovered gas through the first heat exchanger 70, so this part of the heat is utilized, and the exchanged gas enters the box body 10 through the air inlet 110. Therefore, this solution can reduce power consumption and improve energy utilization.

[0179] Furthermore, in some embodiments, the third end 63 of the condensate recovery component 60 is connected to the purification wheel 64; wherein another portion of the gas after passing through the condensate recovery component 60 is discharged into the external atmosphere after passing through the purification wheel 64.

[0180] The purification wheel 64 removes the solvent (such as NMP) in the exhaust gas by adsorption. The purification wheel 64 can be a zeolite wheel. In some embodiments, the working process of the purification wheel 64 involves an adsorption stage, a desorption stage and a regeneration stage. Among them, in the adsorption stage, when the exhaust gas passes through the zeolite wheel, the solvent (such as NMP) is adsorbed by the zeolite adsorbent, and the purified air is discharged. In the desorption stage, the zeolite wheel is heated by hot air in the regeneration zone to desorb the adsorbed solvent (such as NMP) to form a high-concentration exhaust gas. In the regeneration stage, the zeolite wheel after desorption is cooled in the cooling zone to restore the adsorption performance and prepare for the next round of adsorption.

[0181] In this embodiment, the gas after condensation may still contain a small amount of uncondensed solvent (such as NMP). By connecting the third end 63 of the condensation recovery component 60 with the purification wheel 64, the purification wheel 64 processes the above-mentioned gas and discharges the remaining solvent (such as NMP), thereby further reducing the content of the solvent (such as NMP) in the discharged gas and reducing the risk of environmental pollution.

[0182] Optionally, in some embodiments, the gas of the second gas outlet branch 521 passes through the second heat exchange channel of the first heat exchanger 70 and exchanges heat with the gas passing through the first heat exchange channel of the first heat exchanger 70 before being discharged into the external atmosphere.

[0183] In this way, the heat of the gas in the second gas outlet branch 521 is utilized and then discharged, which not only improves the energy utilization rate but also maintains the temperature of the gas entering the box body 10.

[0184] Further, in some embodiments, please continue to refer to Figure 7The coating oven device 1 also includes a second heat exchanger 71 arranged outside the box body 10; the air outlet 111 is connected to the first heat exchange channel of the second heat exchanger 71, the first end 61 of the condensation recovery component 60, the second heat exchange channel of the second heat exchanger 71, the first heat exchange channel of the first heat exchanger 70 and the air inlet 110 in sequence; wherein, the gas passing through the first heat exchange channel of the second heat exchanger 71 enters the condensation recovery component 60 after heat exchange with the gas passing through the second heat exchange channel of the second heat exchanger 71; a part of the gas after passing through the condensation recovery component 60 passes through the second heat exchange channel of the second heat exchanger 71 and exchanges heat with the gas passing through the first heat exchange channel of the second heat exchanger 71, and then enters the first heat exchange channel of the first heat exchanger 70.

[0185] The structure and working principle of the second heat exchanger 71 are similar to those of the first heat exchanger 70 . The second heat exchanger 71 is used to exchange heat between the gas in the first gas outlet branch 520 and the gas passing through the condensation recovery component 60 .

[0186] In this embodiment, by allowing the gas passing through the first heat exchange channel of the second heat exchanger 71 to exchange heat with the gas passing through the second heat exchange channel of the second heat exchanger 71 and then entering the condensation recovery component 60, the heat of the gas with a higher temperature in the first heat exchange channel of the second heat exchanger 71 can be reused, thereby further improving the energy utilization rate; by allowing a portion of the gas after passing through the condensation recovery component 60 to pass through the second heat exchange channel of the second heat exchanger 71 and exchange heat with the gas passing through the first heat exchange channel of the second heat exchanger 71 and then enter the first heat exchange channel of the first heat exchanger 70, in this way, a portion of the gas after passing through the condensation recovery component 60 is heat exchanged by both the first heat exchanger 70 and the second heat exchanger 71, and at the same time, the heat obtained when cooling the infrared component 40 is utilized, and the heat of the gas discharged from the airflow channel 11 is also utilized, and this portion of the gas does not need to obtain too much additional energy when entering the box body 10 again.

[0187] Furthermore, in some embodiments, the housing 10 has a relative pole piece inlet 120 and a pole piece outlet 121, and both the pole piece inlet 120 and the pole piece outlet 121 are provided with a negative pressure cavity 123, and the negative pressure cavity 123 is connected to the first heat exchange channel of the second heat exchanger 71. In this way, the gas discharged from the negative pressure cavity 123 can be condensed and recycled to improve energy utilization.

[0188] Further, in some embodiments, please continue to refer to Figure 7 The cooling component 50 also includes a plurality of second fans 55 disposed outside the housing 10; each second fan 55 is connected to the interior of at least two infrared components 40 through an air intake duct 51; two adjacent air intake ducts 51 are connected through a spare duct 53, and a valve 54 is provided on the spare duct 53.

[0189] The second fan 55 is a component for realizing air circulation and heat transfer, and realizes the purpose of cooling the infrared component 40 by delivering cold air to the infrared component 40. In some embodiments, the second fan 55 can be a high-pressure fan. A high-pressure fan, also known as a high-pressure blower, is a device that uses a second motor as a power source to generate a high-speed airflow by rotating a second impeller, and its working principle is based on the energy conversion of centrifugal force and airflow. When the second motor drives the second impeller to rotate at a high speed, the gas between the second blades is subjected to the centrifugal force and is thrown to the edge of the second impeller to form a high-speed airflow. A low-pressure area is formed in the center of the second impeller, and the external gas is continuously sucked in from the second air inlet under the action of atmospheric pressure. The gas thrown to the edge of the second impeller is discharged from the second air outlet under the guidance of the casing, and a higher pressure and speed are obtained at the same time. In this way, the high-pressure fan converts the mechanical energy of the second motor into the pressure energy and kinetic energy of the gas, thereby realizing the transportation and pressurization of the gas.

[0190] Each second fan 55 can cool down at least two infrared components 40 at the same time. In some embodiments of the present application, each second fan 55 cools down three infrared components 40. The air intake duct 51 is used to deliver the cold air flow provided by the second fan 55 to the infrared component 40. The air intake duct 51 delivers cold air to the infrared component 40 through multiple branches (three branches in this embodiment).

[0191] In order to reduce the risk of sudden failure of the second fan 55 during operation, insufficient cooling of the corresponding infrared component 40, resulting in the infrared component 40 overheating and bursting or igniting the solvent (such as NMP) and causing an explosion, the present embodiment provides a spare pipe 53 between two adjacent air intake pipes 51, and the spare pipe 53 can be used to replenish fresh air when a single second fan 55 fails. A valve 54 is provided on the spare pipe 53, which is closed when the second fan 55 is working normally, and opened when the second fan 55 fails, so as to automatically replenish air.

[0192] In addition, some embodiments are further provided with two thermocouples to monitor the temperature of the infrared lamp tube and the temperature of the outer surface of the infrared lamp cover 41. When the temperature exceeds the threshold, the system is directly shut down (i.e., the pole piece tape feeding and infrared heating are stopped), and the cooling system continues to work.

[0193] In the present embodiment, the cooling component 50 also includes a plurality of second fans 55 arranged outside the box body 10; each second fan 55 is connected to the interior of at least two infrared components 40 through an air intake duct 51, so that at least two infrared components 40 can be cooled by one second fan 55, thereby reducing the usage of the second fan 55; two adjacent air intake ducts 51 are connected through a spare duct 53, and a valve 54 is provided on the spare duct 53, so that when one of the air intake ducts 51 and / or the second fan 55 is abnormal, the valve 54 is opened to allow the adjacent air intake duct 51 to cool the infrared component 40 corresponding to the abnormal air intake duct 51, thereby reducing the risk of fire caused by untimely cooling of the infrared component 40.

[0194] Furthermore, in some embodiments, the coating oven device 1 further includes a control circuit (not shown); the second fan 55 and the valve 54 are both electrically connected to the control circuit; the control circuit is used to control the valve 54 on the standby pipeline 53 adjacent to and connected to the abnormal second fan 55 to open in response to an abnormal operation of the second fan 55. In this way, the valve 54 of the standby pipeline 53 can be dynamically and intelligently adjusted according to the actual working state of the second fan 55.

[0195] Optionally, in some embodiments, the control circuit is used to control the valves 54 on all the spare pipes 53 to open in response to a second fan 55 operating abnormally. In this way, adjacent air intake pipes 51 can share airflow in pairs, thereby reducing the temperature of the infrared component 40.

[0196] In some embodiments, please see Figure 8 The infrared component 40 includes an infrared lamp cover 41 ; both ends of the infrared lamp cover 41 are provided with an air inlet and an air outlet, the air inlet is connected to the air inlet pipe 51 , and the air outlet is connected to the air outlet pipe 52 .

[0197] The infrared lampshade 41 is used to reflect infrared rays, protect the infrared lamp tube and adjust the radiation range. In some embodiments, the infrared lampshade 41 is semi-cylindrical, parabolic, U-shaped or hollow cuboid. Among them, the semi-cylindrical lampshade can provide a more uniform wrapping for the infrared lamp tube, allowing the infrared rays to radiate more dispersedly in a specific direction; the parabolic lampshade can better focus the infrared rays on a specific area, thereby improving energy utilization. The material of the infrared lampshade 41 can be metal or ceramic. Since the infrared rays irradiate the infrared lampshade 41, the temperature of the infrared lampshade 41 is also very high in addition to the infrared lamp tube, so both need to be cooled at the same time.

[0198] Both ends of the infrared lamp cover 41 are provided with air inlet and air outlet, that is, both ends of the infrared lamp cover 41 can be used for air inlet and air outlet, so as to improve the heat dissipation efficiency. The air inlet is connected with the air inlet duct 51, and the air outlet is connected with the air outlet duct 52, so that the cold air in the air inlet duct 51 can be transported to the infrared lamp cover 41 through the air inlet. Since the infrared lamp cover 41 wraps the infrared lamp tube, the cold air transported to the infrared lamp cover 41 can cool down the entire infrared component 40, and the hot air after cooling down the infrared component 40 is transported to the air outlet duct 52 through the air outlet.

[0199] In this embodiment, through the setting of the infrared lamp cover 41, the infrared lamp cover 41 plays the role of reflecting infrared rays, protecting the infrared lamp tube and adjusting the radiation range. By setting air inlet holes and air outlet holes at both ends of the infrared lamp cover 41, the air inlet holes are connected to the air inlet pipe 51, and the air outlet holes are connected to the air outlet pipe 52. In this way, both ends of the infrared lamp cover 41 can take in and out air, thereby improving the heat dissipation efficiency of the infrared component 40.

[0200] Please continue to see Figure 1 and Figure 8 The coating oven device 1 includes a box body 10, a bracket 80, a plurality of infrared components 40 and a driving component (not shown); the bracket 80 is arranged in the box body 10; the plurality of infrared components 40 are installed on the bracket 80; the driving component is arranged outside the box body 10 and connected to the bracket 80; wherein the driving component is used to drive the bracket 80 to move, thereby driving the plurality of infrared components 40 to move together.

[0201] The structures and functions of the housing 10 and the infrared component 40 are similar to those of the aforementioned embodiment and will not be described in detail here.

[0202] The bracket 80 is a support structure installed in the box 10, and is used to support the infrared component 40. The material of the bracket 80 can be a material with high strength such as metal. In the embodiment of the present application, the bracket 80 can simultaneously install multiple infrared components 40, so as to realize simultaneous movement of multiple infrared components 40, improve the parallelism of multiple infrared components 40, and improve the consistency of the distance between the infrared component 40 and the corresponding pole piece 200.

[0203] The driving assembly includes a power source and a transmission mechanism, wherein the power source provides driving force, and the transmission mechanism transmits the power to the bracket 80 to achieve the movement of the bracket 80. In some embodiments, the power source can be a motor or a cylinder; the transmission mechanism can be a belt transmission mechanism, a chain transmission mechanism, a screw transmission mechanism, etc.

[0204] In this embodiment, by driving the bracket 80 to move, multiple infrared components 40 can be driven to move simultaneously, and the distance between the infrared component 40 and the pole piece 200 can be quickly adjusted to improve the adjustment efficiency; multiple infrared components 40 are installed on the same bracket 80, and the overall movement can improve the parallelism between the multiple infrared components 40, thereby improving the consistency of the distance between the pole piece 200 and the infrared component 40, thereby improving the consistency of the drying rate of each pole piece 200.

[0205] Further, in some embodiments, the bracket 80 includes a base 81 and multiple pairs of lamp shade seats 82; the multiple pairs of lamp shade seats 82 are spaced apart on the base 81; the two lamp shade seats 82 of each pair of lamp shade seats 82 are spaced apart at opposite ends of the base 81; wherein an infrared component 40 is installed on each pair of lamp shade seats 82.

[0206] The base 81 is a flat plate structure or a frame structure, which has certain strength and stability and can bear the weight of the infrared component 40. In the embodiment of the present application, the bracket 80 is an integrated structure, which has better rigidity and is not easy to deform. It can improve the parallelism between the infrared components 40, improve the consistency of the distance between the infrared components 40 and the pole pieces 200, and thus improve the consistency of the heating speed of each pole piece 200. Further, in some embodiments, the base 81 is a square tube frame weldment, which is a structural member formed by connecting square tubes through a welding process, and its material can be a metal material such as stainless steel, carbon steel or aluminum alloy. The base 81 can be connected to other components inside the box 10 by bolts, welding, etc. When the bracket 80 moves, the infrared component 40 can move with the bracket 80, thereby reducing the relative movement between the infrared components 40.

[0207] The lampshade holder 82 is used to support and position the infrared components 40, so that the multiple infrared components 40 are arranged in an orderly manner on the bracket 80. The two lampshade holders 82 of each pair of lampshade holders 82 can be spaced apart at opposite ends of the base 81 along the third direction. Figure 8 The Y direction in the infrared component 40 is perpendicular to both the first direction and the second direction. The design of the lampshade holder 82 needs to take into account the size and installation requirements of the infrared component 40. The material of the lampshade holder 82 can be a metal material such as aluminum alloy or stainless steel, among which the aluminum alloy material is light in weight, easy to process and install, and has good thermal conductivity, and can dissipate part of the heat generated by the infrared component 40; the stainless steel material has high corrosion resistance. The shape of the lampshade holder 82 is designed according to the structure and installation requirements of the infrared component 40. The lampshade holder 82 has an installation groove or fixing hole that matches the infrared component 40, and can fix the infrared component 40 on it. The overall shape of the lampshade holder 82 can be block-shaped, plate-shaped or columnar, and the part connected to the base 81 may be reinforced to improve the stability of the connection.

[0208] A plurality of pairs of lampshade seats 82 are arranged at intervals on the base 81, and the two lampshade seats 82 of each pair of lampshade seats 82 are arranged at intervals at opposite ends of the base 81. This spacing arrangement can reasonably distribute the positions of the infrared components 40, so that the infrared rays can be evenly irradiated onto the pole piece 200, thereby improving the uniformity of the drying effect. At the same time, the appropriate spacing also facilitates the installation, maintenance and replacement of the infrared components 40, provides a special installation position for the infrared components 40, and securely fixes the infrared components 40 to the lampshade seats 82 through a specific connection method (such as bolt connection, snap connection, etc.), thereby reducing the probability of displacement or shaking of the infrared components 40 during operation, thereby improving the stability and accuracy of infrared radiation.

[0209] In this embodiment, since the bracket 80 includes a base 81 and multiple pairs of lamp shade seats 82; the multiple pairs of lamp shade seats 82 are arranged on the base 81 at intervals; the two lamp shade seats 82 of each pair of lamp shade seats 82 are arranged at opposite ends of the base 81 at intervals; wherein, an infrared component 40 is installed on each pair of lamp shade seats 82, in this way, the stability of the corresponding infrared component 40 can be improved through each pair of lamp shade seats 82, and multiple infrared components 40 can also be installed on the same base 81 through the lamp shade seats 82, which is conducive to the simultaneous movement and adjustment of multiple infrared components 40.

[0210] In some embodiments, a plurality of pairs of lampshade holders 82 are spaced apart along a first direction; the driving assembly is used to drive the bracket 80 to perform lifting motion along a second direction; and the second direction intersects with the first direction.

[0211] The plurality of pairs of lampshade holders 82 are spaced apart along the first direction, and accordingly, the plurality of infrared components 40 are spaced apart along the first direction. The driving component drives the bracket 80 to perform lifting motion along the second direction, that is, the driving component drives the bracket 80 to perform lifting motion along the vertical direction, thereby adjusting the distance between the plurality of infrared components 40 and the plurality of pole pieces 200.

[0212] In this embodiment, by arranging multiple pairs of lampshade holders 82 along the first direction, the spacing arrangement can reasonably distribute the positions of the infrared components 40, and the lampshade holders 82 are conducive to locating the positions of the infrared components 40, so that multiple infrared components 40 are arranged in an orderly manner on the bracket 80, which helps to optimize the radiation range and intensity distribution of infrared rays, so that the pole piece 200 can be dried under uniform infrared irradiation, and the drying quality and efficiency are improved. At the same time, the appropriate spacing also facilitates the installation, maintenance and replacement of the infrared components 40.

[0213] Optionally, in some embodiments, along the second direction, the driving assembly is disposed above the box body 10 , and the driving assembly is connected to the base 81 via a plurality of lifting screws 91 .

[0214] The driving assembly is arranged above the box body 10, that is, above the outside of the box body 10, and the driving assembly can drive the bracket 80 to move as a whole in the vertical direction by lifting. Among them, the lifting screw 91 is a fastener used for lifting and hoisting operations. In this embodiment, the lifting screw 91 is used to connect the hook and the base 81 to improve the stability during the lifting process. In some embodiments, the four corners of the bracket 80 can be hoisted with the lifting screw 91 respectively. In some embodiments, the lifting screw 91 can be used in conjunction with the lifting nut 92.

[0215] In this embodiment, the driving assembly is arranged above the box body 10, and the driving assembly is connected to the base 81 through a plurality of lifting screws 91. In this way, space can be reserved for the lower part of the infrared assembly 40 to facilitate the passage of the threading trolley, and the lifting of the bracket 80 does not hinder the installation and maintenance of the infrared assembly 40.

[0216] Optionally, in some embodiments, the lampshade holder 82 has a first hollow portion 820 .

[0217] The first hollow portion 820 refers to a hole, gap or transparent area opened on the lampshade holder 82. The lampshade holder 82 can be vertically mounted on the base 81, and the first hollow portion 820 can be formed along the third direction, that is, the opening direction of the first hollow portion 820 is the third direction.

[0218] In this embodiment, by providing the first hollow portion 820 on the lampshade seat 82 , heat conduction between the infrared component 40 and the base 81 can be reduced.

[0219] Furthermore, in some embodiments, an adjusting bolt 83 is provided on the lampshade holder 82 , and the adjusting bolt 83 is used to adjust the height of the lampshade holder 82 .

[0220] The adjusting bolt 83 is an adjusting structure that passes through a screw hole preset on the lampshade holder 82 or is connected to the lampshade holder 82. One end of the adjusting bolt 83 can be in contact with or connected to the lampshade holder 82, and the other end is exposed outside the lampshade holder 82 for easy operation. In some embodiments, the adjusting bolt 83 can be matched with a nut, a gasket, etc. to enhance the stability of the connection and improve the accuracy of the adjustment.

[0221] In this embodiment, by setting an adjustment bolt 83 on the lampshade holder 82, the usage requirements of different usage scenarios can be met. By adjusting the height of the lampshade holder 82, the relative position between the infrared component 40 and the pole piece 200 can be changed, thereby adjusting the projection angle and range of the light so that the light can irradiate the required area; when the infrared component 40 or the lampshade holder 82 needs to be maintained or replaced, appropriately adjusting the height of the lampshade holder 82 can make the operation more convenient, reduce the difficulty of maintenance, and improve maintenance efficiency.

[0222] In some embodiments, please see Fig. 9 The bracket 80 also includes a second temperature measuring element 84 for detecting the temperature of the infrared component 40 .

[0223] The second temperature measuring element 84 may be an infrared temperature sensor, which is a non-contact measurement and can measure the temperature without interfering with the normal operation of the infrared component 40. The second temperature measuring element 84 can monitor the temperature of the infrared component 40 in real time, and convert the temperature signal into an electrical signal and transmit it to the control system, so that the system can adjust the working state of the infrared component 40 according to the difference between the actual temperature and the preset temperature; if the temperature is too high, the control system can reduce the power of the infrared component 40, and directly shut down when the threshold is exceeded, thereby improving the reliability of the coating oven device 1; if the temperature is too low, the power is appropriately increased to maintain the drying efficiency.

[0224] In this embodiment, since the bracket 80 also includes a second temperature measuring element 84, the second temperature measuring element 84 can monitor the temperature of the infrared component 40, and can take into account the reliability and drying efficiency of the coating oven device 1; and the infrared temperature measuring bracket 80 component installed on the bracket 80 can move with the up and down movement of the infrared component 40, reducing the need for close-range temperature measurement of the infrared component 40 and interfering with the adjustment of the infrared component 40.

[0225] Further, in some embodiments, please continue to refer to Figure 1 The coating oven device 1 also includes a plurality of first fans 20; the box body 10 has a relative electrode inlet 120 and a electrode outlet 121 along the first direction; the plurality of first fans 20 are arranged at intervals along the first direction; each first fan 20 is at least partially located in the box body 10; an airflow channel 11 is formed between the plurality of first fans 20 and the top wall of the box body 10, and a tape walkway 12 is provided on the side of the plurality of first fans 20 away from the airflow channel 11; the first fans 20 are used to blow the gas in the airflow channel 11 toward the tape walkway 12; a plurality of infrared components 40 are arranged at intervals in the tape walkway 12 along the first direction; and a second temperature measuring element 84 is arranged on the side of the infrared component 40 away from the airflow channel 11.

[0226] The structures and positions of the first fan 20, the pole piece inlet 120, the pole piece outlet 121, the air flow channel 11 and the tape walkway 12 are similar to those of the aforementioned embodiment and will not be described in detail here.

[0227] The side of the infrared component 40 away from the air flow channel 11 is an area with a higher content of solvent gas (for example, NMP gas). Therefore, the second infrared component 40 detects the area with a higher content of solvent gas. In this way, the phenomenon of explosion or combustion of solvent gas in this area due to excessively high temperature of the infrared component 40 is reduced, thereby improving the stability of the coating oven device 1.

[0228] In this embodiment, since an airflow channel 11 is formed between the plurality of first fans 20 and the top wall of the box body 10, a belt conveyor 12 is provided on the side of the plurality of first fans 20 away from the airflow channel 11; the first fans 20 are used to blow the gas in the airflow channel 11 toward the belt conveyor 12, so that the first fans 20 can blow air from the top to the bottom, which can suppress the electrode 200 and reduce the shaking of the electrode 200; it is beneficial for the new air to disrupt the flow field of the belt conveyor 12, and can carry the gas of the solvent with a higher concentration (for example, NMP) on the surface of the electrode 200 into the airflow channel 11 of the box body 10; by arranging the plurality of infrared components 40 in the belt conveyor 12 at intervals along the first direction, the drying efficiency and the energy utilization rate can be taken into account; by arranging the second temperature measuring element 84 on the side of the infrared component 40 away from the airflow channel 11, the phenomenon of explosion or combustion of the solvent gas in the area with a higher solvent gas content due to the excessively high temperature of the infrared component 40 can be reduced, thereby improving the stability of the coating oven device 1.

[0229] Optionally, in some embodiments, please continue to refer to Fig. 9 The bracket 80 includes a base 81, multiple pairs of infrared detection brackets 85 and multiple support rods 86; the multiple pairs of infrared detection brackets 85 are arranged on the base 81 at intervals; the two lampshade seats 82 of each pair of lampshade seats 82 are arranged at opposite ends of the base 81 at intervals; multiple support rods 86 are arranged on the base 81 at intervals; at least one support rod 86 is installed on each pair of infrared detection brackets 85; wherein one end of the second temperature measuring element 84 is connected to the support rod 86, and the temperature sensing end is suspended and extends to a side of the infrared component 40 away from the airflow channel 11.

[0230] The infrared detection bracket 85 is used to support the second temperature measuring element 84, and the support rod 86 is used to install the second temperature measuring element 84. Specifically, in one embodiment, two support rods 86 can be installed on each pair of infrared detection brackets 85, and the second temperature measuring element 84 is respectively sleeved on the two support rods 86, so that the second temperature measuring element 84 is not easy to rotate; optionally, in another embodiment, the support rod 86 is a prism, and the second temperature measuring element 84 is sleeved on the prism, which is not easy to rotate, thereby improving the stability and accuracy of the measurement.

[0231] The temperature sensing end of the second temperature measuring element 84 extends to the side of the infrared component 40 away from the airflow channel 11, that is, the temperature sensing end of the second temperature measuring element 84 extends to the bottom of the infrared component 40. In one embodiment, the temperature sensing end of the second temperature measuring element 84 is arranged in contact with the bottom surface of the infrared component 40. Due to the obstruction of the infrared component 40, the solvent gas content in the area below the infrared component 40 is high, and if the temperature is too high, it is easy to cause an explosion. Therefore, it is particularly important to monitor the temperature of the area below the infrared component 40.

[0232] In this embodiment, by installing at least one support rod 86 on each pair of infrared detection brackets 85, the stability and accuracy of the measurement can be improved; by connecting one end of the second temperature measuring element 84 to the support rod 86, the temperature sensing end is suspended and extended to the side of the infrared component 40 away from the air flow channel 11, the area with high solvent gas content is monitored, thereby improving the reliability of the coating oven device 1.

[0233] Optionally, in some embodiments, the base 81 has a second hollow portion 810 .

[0234] The opening direction of the second hollow portion 810 may be along the second direction (Z direction, vertical direction), so that the pole piece 200 may be exposed under the infrared component 40 through the second hollow portion 810 .

[0235] In this embodiment, by providing the second hollow portion 810 on the base 81 , the infrared component 40 can radiate to the pole piece 200 through the second hollow portion, thereby reducing the absorption of the temperature of the infrared component 40 by the base 81 .

[0236] In some embodiments, the bottom of the base 81 has a flexible pad (not shown).

[0237] The flexible pad can absorb vibration and impact, and protect the base 81 and the components mounted on the base 81. The flexible pad can provide a buffer when the base 81 descends, reducing the risk that the bracket 80 directly contacts the ground, deforms under force, and causes the bracket 80 to have poor accuracy. The material can be rubber, silicone, or plastic. In some embodiments, the flexible pad is a Teflon pad, which has the advantages of high temperature resistance, not easy to age, and not easy to deform.

[0238] In this embodiment, a flexible pad is provided at the bottom of the base 81, so that a buffer can be provided when the bracket 80 descends, thereby reducing the risk of the bracket 80 directly contacting the ground, deforming due to force, and causing the accuracy of the bracket 80 to deteriorate.

[0239] Furthermore, in some embodiments, the coating oven device 1 further includes a safety cylinder (not shown), which is connected to the bracket 80 .

[0240] The safety cylinder is a device based on the pneumatic drive principle. Through the movement of the piston in the cylinder, the pressure energy of compressed air is converted into mechanical energy to achieve emergency braking. In some embodiments, the safety cylinder may include a cylinder, a piston, a piston rod, an end cover and a sealing structure. Among them, the cylinder is the main part of the safety cylinder; the piston is located inside the cylinder, and is tightly fitted with the inner wall of the cylinder through the piston sealing structure, dividing the cylinder into two chambers; one end of the piston rod is connected to the piston, and the other end extends out of the cylinder for connection with the bracket 80 or other external components; the end cover is installed at both ends of the cylinder to close the cylinder and fix the guide sleeve and sealing structure of the piston rod. Inlet and outlet ports may also be provided on the end cover to control the inlet and outlet of gas; the sealing structure is used to reduce gas leakage and improve the working efficiency and stability of the cylinder.

[0241] In this embodiment, since the coating oven device 1 further includes a safety cylinder connected to the bracket 80 , the safety cylinder can protect the components in the box body 10 when the bracket 80 falls accidentally, thereby improving the reliability of the coating oven device 1 .

[0242] Optionally, see Figure 1-Figure 2 and Figure 10-12 , Fig.10 A schematic diagram of the three-dimensional structure of the first fan 20 provided in some further embodiments of the present application; Fig.11 for Fig.10 An exploded schematic diagram of the first fan 20; Fig.12 for Fig.10 A top view of the first fan 20. Specifically, the coating oven device 1 in this embodiment includes a box body 10 and a first fan 20; at least part of the first fan 20 is arranged in the box body 10; wherein the first fan 20 is a bladeless first fan.

[0243] Among them, the first bladeless fan is a fan that does not rely on traditional blades to generate airflow, but realizes the flow of air through aerodynamic principles and the design of airflow channels 11. It can reduce mechanical friction and noise, while improving the uniformity and efficiency of airflow.

[0244] In this embodiment, by applying the bladeless first fan 20 to the coating oven device 1, the risk of sparks generated by the fan blades colliding with the housing is reduced, and the risk of gas in the box 10 being detonated is also reduced. In addition, compared with conventional fans, the first fan 20 without fans provides a larger air volume and can save more energy; and the first fan 20 without fans is arranged in the box 10, which also breaks the high horizontal wind speed area formed by the large air volume above the lampshade, promotes the mixing of gas and solvent, and brings the mixed gas to the upper part of the box 10 and discharges it, which more efficiently reduces the solvent concentration on the surface of the pole piece 200.

[0245] Further, in some embodiments, the first fan 20 includes a motor 23, a magnetic wheel 24, a blowing assembly 2000 and a bladeless fan 27; the magnetic wheel 24 is connected to the motor 23; the blowing assembly 2000 is connected to the motor 23 through the magnetic wheel 24; the bladeless fan 27 is connected to the blowing assembly 2000; wherein, the blowing assembly 2000 is used to blow air to the bladeless fan 27.

[0246] Among them, the motor 23 is a power source, driving the magnetic wheel 24 to rotate, thereby driving the blower assembly 2000 to work. In some embodiments, the motor 23 includes a stator, a rotor, an end cover and a bearing. The stator is the stationary part of the motor 23, which is composed of an iron core and a winding. The winding will pass current to generate a magnetic field; the rotor is the rotating part of the motor 23, including an iron core and a winding, and generates a rotational torque under the action of the stator magnetic field; the end cover is used to support the bearing and protect the internal structure of the motor 23, and the bearing improves the flexible rotation of the rotor. The motor 23 can be a DC motor or an AC motor.

[0247] The magnetic wheel 24 is directly connected to the motor 23 and is made of high-strength magnetic material, and is used to transmit the rotational power of the motor 23 to the blower assembly 2000. The magnetic wheel 24 can use the attraction and repulsion of the magnet to achieve contactless transmission. Fig.10 , the magnetic wheel 24 includes an active magnetic wheel 240 and a driven magnetic wheel 241. The active magnetic wheel 240 is connected to the motor 23, and the driven magnetic wheel 241 is connected to the blower assembly 2000. Permanent magnets or electromagnets are installed on the active magnetic wheel 240 and the driven magnetic wheel 241. In a stationary state, the S and N poles of the active magnetic wheel 240 and the driven magnetic wheel 241 correspond to each other. When the active magnetic wheel 240 rotates under the drive of the motor 23, the rotating magnetic field generated by it will interact with the magnetic field of the driven magnetic wheel 241, and the like magnetic poles repel each other and the opposite magnetic poles attract each other, thereby driving the driven magnetic wheel 241 to rotate synchronously, thereby realizing contactless transmission of power. In this process, there is no direct mechanical connection between the active magnetic wheel 240 and the driven magnetic wheel 241, but the power is transmitted through the magnetic field as a medium.

[0248] The air blowing assembly 2000 is used to form an air flow under the power drive provided by the motor 23 through the magnetic wheel 24. The air blowing assembly 2000 is like an air compressor, which compresses the air and delivers it to the bladeless fan 27.

[0249] The bladeless fan 27 utilizes the air multiplication principle to amplify a small amount of air into a large amount of airflow. The bladeless fan 27 has an annular or arc-shaped gap, from which air is blown out at high speed. Due to the Coanda effect, the airflow will flow closely to the surface of the annular air outlet 212.

[0250] In this embodiment, since the oven may contain a large amount of flammable and explosive solvent gas, the magnetic wheel 24 can achieve contactless transmission through the setting of the magnetic wheel 24. Compared with the related technology using coupling transmission, this embodiment can reduce the risk of sparks caused by friction and thus causing explosion.

[0251] Further, in some embodiments, see further Fig.11 The blower assembly 2000 includes a rotating shaft 25, an impeller 22 and an impeller guard 28; one end of the rotating shaft 25 is connected to the magnetic wheel 24; the impeller 22 is installed on the rotating shaft 25; the impeller guard 28 is sleeved on the outer side of the impeller 22 and is spaced apart from the impeller 22; wherein the impeller guard 28 is connected to the bladeless fan 27.

[0252] The rotating shaft 25 is used to transmit the rotational power generated by the motor 23 to the impeller 22, so that the impeller 22 can rotate at a high speed. The rotation of the impeller 22 generates centrifugal force, sucks in air and accelerates the discharge, and provides sufficient air volume and pressure for the bladeless fan 27. In some embodiments, the rotating shaft 25 can be a metal rod with certain strength and toughness, one end of which is provided with a connection structure adapted to the magnetic wheel 24, such as a keyway, a spline or other connection interface, which is used to connect with the magnetic wheel 24 to transmit torque; the other end is used to install the impeller 22, and a thread or a slot or other structure is provided on it to fix the impeller 22.

[0253] The impeller 22 includes a plurality of blades and a hub body, wherein the plurality of blades are arranged around the hub body, and the blades rotate at high speed to generate airflow. The material of the impeller 22 can be metal, plastic or composite material.

[0254] The impeller guard 28 is sleeved on the outside of the impeller 22, and its shape is adapted to the impeller 22, and it can be a hollow structure, and is spaced apart from the impeller 22. The impeller guard 28 is used to protect the impeller 22, and can also provide an annular channel for the airflow to smoothly enter the bladeless fan 27.

[0255] In this embodiment, by providing the impeller guard 28 and sleeved on the outside of the impeller 22 and spaced apart from the impeller 22, the risk of direct external contact with the high-speed rotating impeller 22 can be reduced and a vacuum chamber can be provided.

[0256] Further, in some embodiments, please continue to refer to Fig.12 The annular side wall of the impeller guard 28 is provided with a plurality of ventilation holes 281 .

[0257] The impeller guard 28 has an annular side wall with a plurality of vents 281 on the side wall for air intake. The shape and size of the vents 281 are not limited and can be designed as needed. In some embodiments, the plurality of vents 281 are evenly distributed on the annular side wall of the impeller guard 28 along the circumferential direction.

[0258] In this embodiment, the wind force can be increased by providing a plurality of vent holes 281 on the annular side wall of the impeller guard 28.

[0259] Optionally, in some embodiments, the distance between the impeller guard 28 and the impeller 22 is 2.5 mm to 4 mm.

[0260] The spacing between the impeller guard 28 and the impeller 22 refers to the minimum distance between the inner wall of the impeller guard 28 and the outer edge of the impeller 22, and the range is 2.5 mm-4 mm, for example, 2.5 mm, 3 mm, 3.5 mm, 3.5 mm or 4 mm, etc. Within this range, the probability of sparks caused by the collision between the impeller guard 28 and the impeller 22 can be reduced, which also reduces the risk of gas in the box 10 being detonated, and improves the reliability of the coating oven device 1.

[0261] In some embodiments, the blower assembly 2000 also includes a shaft guard cover 250; along the axial direction of the shaft 25, the impeller guard cover 28 has a relative first port and a second port, the other end of the shaft 25 extends from the first port to the impeller guard cover 28, and the impeller 22 is installed at the other end of the shaft 25; the second port is connected to the bladeless fan 27; the shaft guard cover 250 is sleeved on the outside of a portion of the shaft 25 and is connected to the first port.

[0262] The shaft protection cover 250 is a protective structure sleeved on the outside of the shaft 25, and can be a hollow structure, for protecting the shaft 25. Along the axial direction of the shaft 25, the shaft protection cover 250 has a first port and a second port relative to each other, so that along the axial direction of the shaft 25, the shaft 25 passes through the shaft protection cover 250. The shaft protection cover 250 can cooperate with the impeller protection cover 28 to play a certain sealing role on the airflow, reduce the leakage of the airflow from the first port of the impeller protection cover 28, and allow more airflow to flow from the second port to the bladeless fan 27.

[0263] In this embodiment, since the blower assembly 2000 includes a shaft guard cover 250, the shaft guard cover 250 is sleeved on the outside of a portion of the shaft 25 and is connected to the first port of the impeller guard cover 28. It can protect the shaft 25, reduce the entry of dust, debris, etc. into the connection portion between the shaft 25 and the impeller 22, and also reduce the risk of gas leakage.

[0264] In some embodiments, the shaft protection cover 250 and the impeller protection cover 28 are both cylindrical; one end of the shaft protection cover 250 close to the motor 23 is disposed outside the magnetic wheel 24 .

[0265] The shaft protection cover 250 is cylindrical, and the inner diameter of the shaft protection cover 250 is large enough to be sleeved on the outside of the shaft 25, and there is an appropriate gap between the shaft protection cover 25 and the shaft 25 to ensure the normal rotation of the shaft 25. The impeller protection cover 28 is cylindrical, and its inner diameter is adapted to the outer diameter of the impeller 22. It is able to be sleeved on the outside of the impeller 22, and the impeller 22 blades can rotate freely therein, while maintaining a certain distance from the impeller 22.

[0266] In the embodiment of the present application, by arranging the end cover of the shaft protection cover 250 close to the motor 23 on the outside of the magnetic wheel 24, the risk of foreign matter coming into contact with the high-speed rotating magnetic wheel 24 and the shaft 25 can be reduced, the impact of the external environment on the magnetic wheel 24 and the shaft 25 can be reduced, and the reliability of the blower assembly 2000 can be improved.

[0267] In some embodiments, along the axial direction of the rotating shaft 25 , the distance between the rotating shaft protection cover 250 and the magnetic wheel 24 is 2.5 mm-4 mm.

[0268] Along the axis direction of the rotating shaft 25, the spacing between the rotating shaft shield 250 and the magnetic wheel 24 refers to the distance between the port of the rotating shaft shield 250 close to the magnetic wheel 24 and the end face of the magnetic wheel 24 close to the rotating shaft shield 250 in the direction parallel to the center line of the rotating shaft 25. The range is 2.5 mm-4 mm, for example, 2.5 mm, 3 mm, 3.5 mm, 3.5 mm or 4 mm. Within this range, the probability of sparks caused by collision can be reduced, and the reliability of the coating oven device 1 is improved.

[0269] In some embodiments, see Fig.13 The motor 23 is arranged outside the box body 10; the magnetic wheel 24 is arranged inside the box body 10; the side wall of the box body 10 has an avoidance hole 13, the driving shaft 230 of the motor 23 passes through the avoidance hole 13 and is connected to the magnetic wheel 24, and a sealing member 26 is provided between the driving shaft 230 of the motor 23 and the hole wall of the avoidance hole 13.

[0270] The motor 23 is arranged outside the box body 10, and the magnetic wheel 24 is arranged inside the box body 10. The driving shaft 230 of the motor 23 is connected to the magnetic wheel 24 through the avoidance hole 13 on the side wall of the box body 10. Therefore, there may be a gap between the rotating shaft 25 and the box body 10. During the operation of the impeller 22, the flow of gas may cause the solvent gas (such as NMP gas) to leak through the pores.

[0271] In this embodiment, by providing a seal 26 between the drive shaft 230 of the motor 23 and the hole wall of the avoidance hole 13, the risk of solvent gas leakage caused by the flow of gas during the operation of the first blower 20 can be reduced.

[0272] In some embodiments, the box body 10 has a relative pole piece inlet 120 and a pole piece outlet 121 along a first direction; a plurality of first fans 20 are arranged at intervals along the first direction; an airflow channel 11 is formed between the plurality of first fans 20 and the top wall of the box body 10, and the airflow channel 11 has an air inlet 110 at one end close to the pole piece outlet 121, and an air outlet 111 at one end close to the pole piece inlet 120; a plurality of first fans 20 have a belt conveyor 12 on the side away from the airflow channel 11; the first fans 20 are used to blow the gas in the airflow channel 11 toward the belt conveyor 12.

[0273] Among them, the first fan 20 is used to blow the gas in the airflow channel 11 to the belt conveyor channel 12. On the one hand, the first fan 20 can disperse the gas with higher solvent content in the belt conveyor channel 12 and mix it with the gas with higher solvent content, which is beneficial to the drying of the electrode 200; on the other hand, the first fan 20 can suppress the electrode 200 and reduce the shaking of the electrode 200.

[0274] In some embodiments, please see Figure 1 and Figure 2 The coating oven device 1 also includes a plurality of support rollers 30 and a plurality of infrared components 40; the plurality of support rollers 30 are arranged in the belt conveyor channel 12 at intervals along the first direction; the plurality of infrared components 40 are arranged in the belt conveyor channel 12 at intervals along the first direction; wherein, along the second direction, the plurality of infrared components 40 are arranged between the plurality of support rollers 30 and the plurality of first fans 20; the second direction intersects with the first direction; along the second direction, the airflow channel 11 and the belt conveyor channel 12 are located on opposite sides of the plurality of first fans 20.

[0275] In this way, on the one hand, the infrared component 40 can heat and dry the electrode piece 200, which is beneficial to the drying of the electrode piece 200. On the other hand, the wind blown out by the first fan 20 can mix the gas with low solvent content in the air flow channel 11 with the gas with high solvent content in the belt conveyor channel 12, thereby further improving the drying efficiency. The electrode piece 200 can also be pressed on the supporting roller 30 to reduce the shaking of the electrode piece 200.

[0276] In some embodiments, please see Figure 14-15 The bladeless fan 27 includes an annular shell 29, the annular side wall of the annular shell 29 is a hollow structure, and the annular side wall has a gap 291 at one end close to the tape walkway 12; along the second direction, the first fan 20 and the infrared component 40 are staggered, and the gap 291 of one annular shell 29 is exposed to the tape walkway 12 through the gap between two adjacent infrared components 40.

[0277] The annular side wall of the annular housing 29 is a hollow structure, and an air passage is formed in the hollow structure. When the air blowing assembly 2000 sends air into the annular housing 29, the air will flow and gather in the hollow annular side wall. The design of the hollow structure helps to buffer and regulate the air, so that the air can flow out in a more stable state.

[0278] One end of the annular side wall close to the belt walking channel 12 has a gap 291. The annular shell 29 can make the delivered air blow out along the gap 291. It can also use the pressure difference caused by the difference in flow velocity inside and outside the ring to drive the air behind the ring to blow forward. At the same time, by using the viscosity of the air when flowing at high speed, part of the air can be dragged forward and blown out. Therefore, compared with the traditional blower fan, its air volume is not only the original air volume provided by the fan blades. Therefore, the air volume brought by this design is greater than the air volume provided by the impeller 22, and it can save more energy.

[0279] Along the vertical direction, the first fan 20 and the infrared component 40 are staggered, and at the same time, a gap 291 of an annular shell 29 is exposed to the tape walkway 12 through the gap between two adjacent infrared components 40. In this way, each first fan 20 can correspond to two infrared components 40. The first fan 20 can blow air downward through the gap 291 of the annular shell 29, which is conducive to the mixing of the gas with high solvent concentration on the surface of the pole piece 200 and the gas with low solvent concentration in the airflow channel 11, and can also reduce the up and down fluctuation of the pole piece 200 in the bottom tape walkway 12.

[0280] In some embodiments, the annular side wall includes two short side walls 293 extending along a first direction and two long side walls 292 extending along a third direction; wherein both the first direction and the second direction intersect with the third direction; the long side wall 292 includes an inner side wall 2920 and an outer side wall 2921 arranged at intervals, and the end of the inner side wall 2920 close to the tape walkway 12 is bent toward the side of the outer side wall 2921 to form a first arc portion 2923, and the end of the outer side wall 2921 close to the tape walkway 12 is bent toward the side of the inner side wall 2920 to form a second arc portion 2924; a gap 291 is formed between the first arc portion 2923 and the second arc portion 2924, and the air outlet direction of the gap 291 is inclined toward the outside of the annular shell 29.

[0281] Two short side walls 293 extending in a first direction (horizontal direction, X direction) and two long side walls 292 extending in a third direction (Z direction) are connected end to end to form a hollow annular side wall structure. The double-wall structure provides a channel for air to flow in the annular housing 29.

[0282] This embodiment can achieve that the gas flowing in the annular side wall is blown out through the gap 291. Compared with the vertical air outlet design, the inclined air outlet can make the air outlet more easily reach the bottom of the infrared component 40, disrupt the flow field of the belt conveyor channel 12, and can carry the gas with a higher concentration of solvent (for example, NMP) on the surface of the electrode 200 into the air flow channel 11 of the box body 10, thereby reducing the concentration of the solvent in the gas in the belt conveyor channel 12 and improving the stability of the coating oven device 1.

[0283] In some embodiments, the first fan 20 includes two motors 23, two magnetic wheels 24 and two air blowing assemblies 2000; along the third direction, a motor 23, a magnetic wheel 24 and an air blowing assembly 2000 are respectively arranged at both ends of the annular housing 29; along the third direction, the width of the air outlet 212 of the gap first gradually increases and then gradually decreases. In this way, the uniformity of the air outlet can be increased.

[0284] The electrode drying device described in the embodiment of this application is suitable for battery production system. Fig.16 , Fig.16 A module diagram of a battery production system 1000 provided for some embodiments of the present application.

[0285] The battery production system 1000 in the embodiment of the present application includes a pole piece coating device 2 and a coating oven device 1, wherein the pole piece coating device 2 is used to coat the slurry on the collector to form a pole piece; the coating oven device 1 is a coating oven device 1 provided in any one of the above embodiments, and is used to dry the pole piece.

[0286] In some embodiments, the electrode coating device 2 can coat the electrode active material (such as LiCoO 2 、LiFePO 4 , graphite or silicon-based materials for the negative electrode) mixed with a conductive agent and a binder is evenly coated on the metal foil current collector (aluminum foil / copper foil). Further, in some embodiments, the electrode coating device may include a feeding mechanism and a coating head. Among them, the feeding mechanism is used to store and transport the battery slurry, and the slurry can be stably supplied during the coating process by controlling the supply amount of the slurry. The coating head is used to evenly apply the coating to the mother roll. Common types of coating heads include scraper coating heads, slit coating heads, comma scraper coating heads, etc.

[0287] The coating oven device 1 can dry the coated electrode sheet, remove the solvent in the electrode sheet, solidify the active material, binder and other components in the slurry and adhere to the current collector, thereby improving the performance and stability of the electrode sheet.

[0288] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, devices or units, which can be electrical, mechanical or other forms.

[0289] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0290] The above description is only an implementation method of the present application, and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A coating oven device, characterized in that: include: Box; A first fan is at least partially disposed in the housing; Wherein, the first fan is a bladeless first fan; the first fan comprises: Motor; A magnetic wheel connected to the motor; A blower assembly connected to the motor via the magnetic wheel; a bladeless fan, connected to the air blowing assembly; Wherein, the air blowing assembly is used to blow air to the bladeless fan.

2. The coating oven device according to claim 1, characterized in that: The air blast assembly comprises: A rotating shaft, one end of which is connected to the magnetic wheel; An impeller, mounted on the rotating shaft; An impeller protection cover is sleeved on the outer side of the impeller and spaced apart from the impeller; Wherein, the impeller guard is communicated with the bladeless fan.

3. The coating oven device according to claim 2, characterized in that: The annular side wall of the impeller guard is provided with a plurality of vent holes.

4. The coating oven device according to claim 2, characterized in that: The distance between the impeller guard and the impeller is 2.5 mm to 4 mm.

5. The coating oven device according to claim 2, characterized in that: The air blast assembly also includes a rotating shaft protective cover; Along the axial direction of the rotating shaft, the impeller guard has a first port and a second port relative to each other, the other end of the rotating shaft extends from the first port into the impeller guard, and the impeller is installed at the other end of the rotating shaft; the second port is connected to the bladeless fan; the rotating shaft guard is sleeved on the outer side of a portion of the rotating shaft and is connected to the first port.

6. The coating oven device according to claim 5, characterized in that: The shaft protection cover and the impeller protection cover are both cylindrical; the shaft protection cover is arranged on the outside of the magnetic wheel at one end close to the motor.

7. The coating oven device according to claim 6, characterized in that: Along the axial direction of the rotating shaft, the distance between the rotating shaft protection cover and the magnetic wheel is 2.5 mm-4 mm.

8. The coating oven device according to claim 1, characterized in that: The motor is arranged outside the box body; the magnetic wheel is arranged inside the box body; the side wall of the box body has an avoidance hole, the driving shaft of the motor passes through the avoidance hole and is connected to the magnetic wheel, and a seal is provided between the driving shaft of the motor and the hole wall of the avoidance hole.

9. The coating oven device according to any one of claims 1 to 8, characterized in that: The box body has a relative pole piece inlet and pole piece outlet along a first direction; a plurality of the first fans are arranged at intervals along the first direction; an air flow channel is formed between the plurality of the first fans and the top wall of the box body, the air flow channel has an air inlet at one end close to the pole piece outlet, and an air outlet at one end close to the pole piece inlet; a plurality of the first fans have a belt conveyor on one side away from the air flow channel; the first fans are used to blow the gas in the air flow channel toward the belt conveyor.

10. The coating oven device according to claim 9, characterized in that: The coating oven device also includes: A plurality of support rollers are arranged in the belt walking channel at intervals along the first direction; A plurality of infrared components are arranged in the tape path at intervals along the first direction; Among them, along the second direction, multiple infrared components are arranged between multiple supporting rollers and multiple first fans; the second direction intersects with the first direction; along the second direction, the airflow channel and the belt walking channel are located on opposite sides of the multiple first fans.

11. The coating oven device according to claim 10, characterized in that: The bladeless fan includes an annular shell, the annular side wall of the annular shell is a hollow structure, and the annular side wall has a gap at one end close to the tape walkway; along the second direction, the first fan and the infrared component are staggered, and a gap in the annular shell is exposed to the tape walkway through the gap between two adjacent infrared components.

12. The coating oven device according to claim 11, characterized in that: The annular side wall comprises two short side walls extending along the first direction and two long side walls extending along the third direction; wherein both the first direction and the second direction intersect with the third direction; The long side wall includes an inner side wall and an outer side wall that are spaced apart from each other, wherein one end of the inner side wall close to the tape walkway is bent toward the outer side wall to form a first arc-shaped portion, and one end of the outer side wall close to the tape walkway is bent toward the inner side wall to form a second arc-shaped portion; the gap is formed between the first arc-shaped portion and the second arc-shaped portion, and the air outlet direction of the gap is inclined toward the outside of the annular shell.

13. The coating oven device according to claim 12, characterized in that: The first fan includes two motors, two magnetic wheels and two blowing assemblies; along the third direction, one motor, one magnetic wheel and one blowing assembly are respectively arranged at both ends of the annular shell; along the third direction, the width of the air outlet of the gap first gradually increases and then gradually decreases.

14. A battery production system, characterized in that: include: A pole piece coating device, used for coating the slurry on the current collector to form a pole piece; The coating oven device according to any one of claims 1 to 13 is used to dry the electrode piece.

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