Coating oven device and battery production system

Abstract

The present application provides a coating oven device and a battery production system, wherein the coating oven device includes: a housing; a plurality of first fans arranged at intervals along a first direction; each of the first fans is at least partially located in the housing; an air flow channel is formed between the plurality of first fans and the top wall of the housing; the air flow channel has an air inlet and an air outlet; a plurality of first fans have a belt conveyor on the 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. In this way, the large air volume provided by the first fans can have more space to be discharged to the air outlet in the upper part of the oven; the first fans can disperse the gas with a high solvent content in the belt conveyor, mix it with the gas with a low solvent content, and flow it into the air flow channel, further reducing the solvent content on the surface of the electrode; the air outlet of the first fans can suppress the electrode and reduce the vibration of the electrode.

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 lithium-ion battery pole pieces is a critical step in the battery manufacturing process. Its purpose is to remove the solvent from the pole pieces and form an electrode structure with good electrochemical performance. The pole piece drying process is generally completed in an oven. However, the presence of many fans inside the oven can lead to uneven internal flow fields. In particular, the positive electrode oven contains flammable and explosive evaporating solvent gases. Therefore, the uniform distribution of the air field in the oven needs to be controlled to reduce the occurrence of localized evaporation of solvent gases exceeding the standard. Summary of the Invention

[0003] The main technical problem solved by the present application is to provide a coating oven device and a battery production system that can reduce the amount of solvent gas exceeding the standard that can be evaporated locally.

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

[0005] Box;

[0006] Multiple first fans are arranged at intervals along a first direction; each first fan is at least partially located in the box; an air flow channel is formed between the multiple first fans and the top wall of the box; the air flow channel has an air inlet and an air outlet; the multiple first fans have a belt conveyor on the 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.

[0007] In the above technical solution, multiple first fans are set up, and the multiple first fans are spaced apart along the first direction; each first fan is at least partially located in the box; wherein, multiple air flow channels are formed between the multiple first fans and the cavity wall of the box, and the first fans are used to blow the gas in the air flow channel to the belt conveyor; the multiple first fans have a belt conveyor on the side away from the air flow channel, so that the large air volume provided by the first fan has more space to be discharged to the air outlet on the upper part of the oven; the first fan can disperse the gas with a higher solvent content in the belt conveyor, mix it with the gas with a lower solvent content, and flow it into the air flow channel, further reducing the solvent content on the surface of the electrode; the air outlet of the first fan can play a role in suppressing the electrode and reducing the shaking of the electrode.

[0008] In some embodiments, the first fan comprises:

[0009] A shell is disposed in the box; the shell has a flow channel inside;

[0010] an impeller disposed in the flow channel;

[0011] The circle where the arc-shaped surface of the inner surface of the flow channel is located is eccentrically arranged relative to the circle where the impeller is located.

[0012] In the above technical solution, since the circle where the curved surface of the inner surface of the flow channel is located is eccentrically arranged relative to the circle where the impeller is located, the vortex formed in the flow channel cooperates with the eccentrically arranged outer 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 direction of the flow channel, which promotes the mixing of gas and solvent, and brings the mixed gas to the air flow channel and discharges it, thereby reducing the solvent concentration on the surface of the electrode.

[0013] In some embodiments, the flow channel has an air inlet and an air outlet, and an adjusting member is provided on the side wall of the air outlet; the adjusting member can move relative to the side wall of the air outlet to adjust the opening of the air outlet.

[0014] In the above technical solution, since the slurries, solvents and drying conditions of the electrodes of different batteries are different, the outlet air volume can be adjusted as needed by adjusting the opening of the air outlet to meet the drying requirements of different electrodes.

[0015] In some embodiments, the arcuate surface of the inner surface of the flow channel includes a first arcuate surface and a second arcuate surface relative to each other, and the circle where the first arcuate surface is located and the circle where the second arcuate surface is located are both eccentrically arranged relative to the circle where the impeller is located; along the direction from the air inlet to the air outlet, the eccentric direction of the circle where the first arcuate surface is located relative to the circle where the impeller is located is opposite to the eccentric direction of the circle where the second arcuate surface is located relative to the circle where the impeller is located.

[0016] In the above technical solution, since the eccentric direction of the circle where the first curved surface is located relative to the circle where the impeller is located is opposite to the eccentric direction of the circle where the second curved surface is located relative to the circle where the impeller is located along the direction from the air inlet to the air outlet, the flow path of the airflow is further optimized, making the airflow more evenly distributed in the flow channel.

[0017] In some embodiments, the housing and the impeller are both made of aluminum alloy, and the inner surface of the housing and the outer surface of the impeller are both provided with a flexible covering layer.

[0018] In the above technical solution, by adopting a casing and an impeller of an aluminum alloy structure, and the inner surface of the casing and the outer surface of the impeller both having a flexible covering layer, the occurrence of fire can be reduced.

[0019] In some embodiments, the first fan further comprises:

[0020] Motor;

[0021] a magnetic wheel connected to the motor;

[0022] a rotating shaft, one end of which is connected to the magnetic wheel and the other end of which is disposed in the flow channel;

[0023] Wherein, the impeller is installed on the rotating shaft.

[0024] In the above technical solution, since the first fan includes a motor, a magnetic wheel and a rotating shaft, wherein the magnetic wheel can achieve non-contact transmission, when there is a large amount of flammable and explosive solvent gas in the oven, the magnetic wheel can reduce the risk of impeller jitter caused by coaxiality error and sparks generated by friction of the coupling when using traditional coupling transmission, thereby causing explosion.

[0025] In some embodiments, the motor is arranged outside the box body, and the magnetic wheel is arranged inside the box body; the side wall of the box body 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.

[0026] In the above technical solution, by setting a seal between the drive shaft of the motor and the wall of the avoidance hole, the risk of solvent gas leaking from the gap between the drive shaft of the motor and the wall of the avoidance hole due to the flow of gas during the operation of the impeller can be reduced.

[0027] In some embodiments, a shaft protection tube is provided on the outer cover of the shaft section between the magnetic wheel and the housing; and an end of the shaft protection tube close to the motor is covered on the outside of the magnetic wheel.

[0028] In the above technical solution, a shaft protective cover is provided on the outside of the shaft section between the magnetic wheel and the shell; the shaft protective cover is provided on the outside of the magnetic wheel at one end close to the motor, thereby protecting the shaft section between the magnetic wheel and the shell and the magnetic wheel, and also reducing the risk of gas leakage.

[0029] In some embodiments, the first fan further comprises:

[0030] Motor;

[0031] a rotating shaft, one end of which is connected to the motor and the other end of which is disposed in the flow channel;

[0032] Wherein, the impeller includes a plurality of impeller segments; the plurality of impeller segments are installed on the rotating shaft along the axis of the rotating shaft.

[0033] In the above technical solution, by configuring the impeller to include multiple impeller segments, and the multiple impeller segments are installed on the rotating shaft along the axis of the rotating shaft, the difficulty of the preparation process caused by the impeller being too long can be reduced.

[0034] In some embodiments, the distance between the inner surface of the flow channel and the impeller is 2.5-4 mm.

[0035] In the above technical solution, since the distance between the inner surface of the flow channel and the impeller is 2.5 mm to 4 mm, the probability of sparks caused by collision can be reduced.

[0036] In some embodiments, the box body has relative pole piece inlets and pole piece outlets along the first direction; multiple first fans are arranged at intervals along the first direction; the air flow channel is formed between the multiple first fans and the top wall of the box body, and 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.

[0037] In the above technical solution, the first fan can blow air from top to bottom, which can suppress the electrode and reduce the shaking of the electrode; it is beneficial for the fresh air to disrupt the flow field of the belt channel, and can 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.

[0038] In some embodiments, the coating oven device further comprises:

[0039] A plurality of support rollers are arranged in the belt path at intervals along the first direction;

[0040] A plurality of infrared components are arranged in the tape path at intervals along the first direction;

[0041] Among them, along the second direction, multiple infrared components are arranged between multiple support 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 multiple first fans.

[0042] In the above technical solution, on the one hand, the infrared component can heat and dry the electrode, which is beneficial to the drying of the electrode. 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 channel, further improving the drying efficiency, and can press the electrode on the support roller to reduce the shaking of the electrode.

[0043] To solve the above technical problems, in a second aspect, another technical solution adopted by this application is to provide a battery production system, comprising:

[0044] A pole piece coating device, used to coat the slurry on the current collector to form a pole piece;

[0045] The coating oven device provided according to any one of the above embodiments is used to dry the electrode piece.

[0046] In the above technical solution, multiple first fans are set up, and the multiple first fans are spaced apart along the first direction; each first fan is at least partially located in the box; wherein, multiple air flow channels are formed between the multiple first fans and the cavity wall of the box, and the first fans are used to blow the gas in the air flow channel to the belt channel; the multiple first fans have a belt channel on the side away from the air flow channel, so that the large air volume provided by the first fan has more space to be discharged to the air outlet on the upper part of the oven; the first fan can disperse the gas with a higher solvent content in the belt channel, flow to the gas with a higher solvent content for mixing, and flow into the air flow channel, further reducing the solvent content on the surface of the electrode; the air outlet of the first fan can play a role in suppressing the electrode and reducing the shaking of the electrode. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. 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 creative work.

[0048] Figure 1 A schematic structural diagram of a coating oven device provided in some embodiments of the present application;

[0049] Figure 2 for Figure 1 A schematic structural diagram of a portion of a coating oven device;

[0050] Figure 3 A schematic structural diagram of a first fan and an infrared lamp cover provided in some embodiments of the present application;

[0051] Figure 4 A schematic diagram of a casing flow passage of a first fan provided in some embodiments of the present application;

[0052] Figure 5 A schematic diagram of the three-dimensional structure of a first fan provided in some other embodiments of the present application;

[0053] Figure 6 A schematic structural diagram of the assembly of a first fan and a box provided in some embodiments;

[0054] Figure 7 A schematic structural diagram of a coating oven device provided in some other embodiments of the present application;

[0055] Figure 8 A partial structural schematic diagram of a coating oven device provided in some embodiments of the present application;

[0056] Figure 9 A partial structural schematic diagram of a coating oven device provided in some further embodiments of the present application;

[0057] Figure 10 A schematic diagram of the three-dimensional structure of a first fan provided in some further embodiments of the present application;

[0058] Figure 11 for Figure 10 Exploded diagram of the first fan;

[0059] Figure 12 for Figure 10 A top view of the first fan;

[0060] Figure 13 A schematic structural diagram of the assembly of a first fan and a box provided by other embodiments of the present application;

[0061] Figure 14 for Figure 10 A schematic diagram of a portion of the structure of a coating oven device in which a first blower is applied is provided;

[0062] Figure 15 for Figure 14 Partial structural diagram of the first fan;

[0063] Figure 16 A module diagram of a battery production system provided for some embodiments of the present application.

[0064] Description of Figure Numbers:

[0065] 1-coating oven device, 10-box, 11-air flow channel, 110-air inlet, 111-air outlet, 112-first curved channel, 1120-inner air outlet channel, 1121-outer air outlet channel, 113-second curved 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-tape transport channel, 120-electrode inlet, 121-electrode outlet, 123 -Negative pressure chamber, 13-avoidance hole, 20-first fan, 21-housing, 210-flow channel, 211-air inlet, 212-air outlet, 213-first curved surface, 214-second curved 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-seal, 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 side wall, 2921-outer side wall, 293-short side wall, 2923-first arc portion, 2924-second arc portion, 30-support roller, 40-infrared component, 41-infrared lampshade, 411-flow guide 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-lampshade 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

[0066] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0067] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are for the purpose of describing specific embodiments only 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 apparatus comprising a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units that are not listed, or may optionally include other steps or units that are inherent to these processes, methods, products or apparatuses.

[0068] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0069] In the description of the embodiments of this application, the technical terms "first," "second," "third," etc., are used solely to distinguish different objects and are not to be understood as indicating or implying relative importance, or implicitly indicating the quantity, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "plurality" means two or more (including two), such as two, three, etc., unless otherwise specifically defined. Similarly, "multiple groups" means two or more (including two), and "multiple sheets" means two or more (including two).

[0070] In the description of the embodiments of this application, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent the following three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0071] 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", etc. indicate the orientation or position relationship based on the relative orientation or position relationship between the components in a certain specific posture (as shown in the drawings) shown in the drawings. They 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 device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limiting the embodiments of the present application.

[0072] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components or interactions between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present application based on specific circumstances.

[0073] Pole drying is a key step in the manufacturing process of lithium-ion batteries. Its purpose is to remove the solvent in the pole piece and form an electrode structure with good electrochemical properties. The pole piece drying process is generally completed in an oven. However, the presence of many fans inside the oven will cause uneven internal flow fields. Especially during the drying process of the positive pole piece, 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. When the lower explosive concentration of 1.3% vol is reached, it will explode. It is toxic and can enter the human body through inhalation, swallowing, 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.

[0074] After research, it was found that the coating oven device in the relevant technology has the following problems: the fan is generally set outside the box, and can only realize the air flow inside the box and the air circulation outside the box. It is difficult to form air circulation inside the box, and the drying efficiency is limited.

[0075] In order to solve the above problems, the present application provides a coating oven device including a box body and multiple first fans; the multiple first fans are arranged at intervals along a first direction; each first fan is at least partially located in the box body; an air flow channel is formed between the multiple first fans and the top wall of the box body; the air flow channel has an air inlet and an air outlet; the multiple 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.

[0076] In this embodiment, multiple first fans are set up, and the multiple first fans are spaced apart along the first direction; each first fan is at least partially located in the box; wherein, multiple air flow channels are formed between the multiple first fans and the cavity wall of the box, and the first fans are used to blow the gas in the air flow channel to the belt conveyor; the multiple first fans have a belt conveyor on the side away from the air flow channel, so that the large air volume provided by the first fan has more space to be discharged to the air outlet on the upper part of the oven; the first fan can disperse the gas with a higher solvent content in the belt conveyor, mix it with the gas with a lower solvent content, and flow it into the air flow channel, thereby further reducing the solvent content on the surface of the electrode; the air outlet of the first fan can suppress the electrode and reduce the vibration of the electrode.

[0077] The present application will be described in detail below with reference to the accompanying drawings and embodiments.

[0078] See Figure 1 and Figure 2 , Figure 1 A schematic structural diagram 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 part of the box body 10 of the coating oven device 1.

[0079] The coating oven device 1 in some embodiments of the present application includes a box body 10 and multiple infrared components 40. The interior of the box body 10 has an air flow channel 11 and a tape channel 12 that are interconnected. The multiple infrared components 40 are arranged in the tape channel 12 at intervals along the 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 an air outlet 111 at one end close to the electrode inlet 120.

[0080] 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.

[0081] The conveyor channel 12 is a channel for accommodating and transporting electrodes. The conveyor channel 12 has an electrode inlet 120 and an electrode outlet 121 relative to each other along the first direction. The electrode inlet 120 refers to the position where the electrode to be dried enters the conveyor channel 12, and the electrode outlet 121 refers to the position where the electrode after drying leaves the conveyor channel 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 along the X direction in the belt channel 12. 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 at certain time intervals through the conveyor belt to achieve drying of different electrode pieces.

[0082] The airflow channel 11 provides a channel for the flow of air and heat and is located above the belt conveyor 12. That is, when the coating oven device 1 is normally installed and operated, the airflow channel 11 is located above the belt conveyor 12. Furthermore, in some embodiments, the airflow channel 11 is located at the top of the interior of the housing 10, that is, the airflow channel 11 is located near the top wall of the housing 10. The airflow channel 11 has an air inlet 110 at one end near the electrode outlet 121, and an air outlet 111 at one end near the electrode inlet 120. The air inlet 110 is where the outside air enters the housing 10; the air outlet 111 is where the air mixed with the solvent evaporated from the electrode is discharged from the housing 10. The airflow in the airflow channel 11 flows in the opposite direction of X, that is, the airflow direction is opposite to the electrode transmission direction. This can improve the mixing efficiency of the solvent gas released from the electrode surface by the airflow channel 11, improve the drying effect of the electrode, and reduce solvent residue. It can be understood that the solvent content in the air near the air inlet 110 is lower. After the electrode is dried, it will be discharged from the electrode outlet 121. The air inlet 110 and the electrode outlet 121 are located on the same side, so that there is less solvent after the electrode is discharged from the electrode outlet 121, 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 each section of the box 10 can be provided with 12 infrared components 40 and 6 first fans 20.

[0083] 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 infrared component 40 heats up during operation, and the first fan 20 can also cool the infrared component 40. Along the second direction, the airflow channel 11 and the belt conveyor 12 are located on opposite sides of the multiple first fans 20, which facilitates the mixing of the fresh air (gas with a low solvent content) in the airflow channel 11 and the gas with a high solvent content in the belt conveyor 12.

[0084] In this embodiment, since the air flow channel 11 is located above the tape channel 12, the electrode jitter can be reduced; moreover, the air flow 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 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 an air outlet 111 at one end close to the electrode inlet 120, that is, the air flow 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.

[0085] Please continue to see Figure 1 and Figure 2 In some embodiments, the air inlet 110 and the air outlet 111 are both bent away from the tape path 12 and form an arc-shaped channel at the corner.

[0086] Because the airflow channel 11 is located above the tape path 12, the air inlet 110 bends away from the tape path 12, that is, the air inlet 110 bends upward. The curved channel includes a first curved channel 112 and a second curved channel 113. The air inlet 110 bends away from the tape path 12 to form the first curved channel 112, allowing air to flow into the housing 10 in a more gentle and dispersed manner, reducing the risk of air directly rushing into the housing 10 and improving airflow smoothness.

[0087] Because airflow channel 11 is located above belt conveyor 12, outlet 111 bends away from belt conveyor 12, that is, outlet 111 bends upward. This bend away from belt conveyor 12 forms a second curved channel 113, which facilitates the smooth discharge of waste gas from the drying process within housing 10, which has a high solvent content and has cooled. This reduces turbulence caused by abrupt corners during exhaust discharge and reduces residual solvent (e.g., NMP) gas at these corners.

[0088] Therefore, in this embodiment, since the air inlet 110 and the air outlet 111 are both bent to the side 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 10, improve the smoothness of the air flow, and reduce the residual solvent (such as NMP) gas at the corner.

[0089] In some embodiments, a first guide plate 114 is disposed in the first curved channel 112 of the air outlet 111 . The first guide plate 114 divides the first curved channel 112 of the air outlet 111 into an inner air outlet channel 1120 and an outer air outlet channel 1121 .

[0090] The deflectors (including the first deflector 114 and the second deflector 115 described below) are structures that are machined into desired shapes based on the air duct design and airflow requirements of the housing 10 and are used to redirect airflow. In this embodiment, since the first deflector 114 is disposed within the first curved channel 112 of the air outlet 111, dividing the first curved channel 112 of the air outlet 111 into an inner air outlet channel 1120 and an outer air outlet channel 1121, the probability of vortex formation is reduced, thereby reducing residual solvent (e.g., NMP) gas at corners and ensuring more uniform mixing of the solvent gas.

[0091] 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.

[0092] Specifically, the first guide plate 114 is a curved plate with a certain curvature. The curvature of the first guide plate 114 is adapted to the curvature of the air outlet 111, which bends away from the belt conveyor 12 and forms the first curved channel 112 at the corner. The adjustable position of the first guide plate 114 means that the first guide plate 114 can be moved along the width of the first curved channel 112 of the air outlet 111, thereby adjusting the width ratio of the inner air outlet channel 1120 and the outer air outlet channel 1121 of the air outlet 111. In this way, the width ratio of the inner air outlet channel 1120 to the outer air outlet channel 1121 can be made to correspond to the width ratio of the inner air inlet channel 1130 to the outer air inlet channel 1131, which is conducive to overall airflow stability.

[0093] 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.

[0094] The second guide plate 115 is similar to the first guide plate 114. The second guide plate 115 is adjustable in position, meaning that it can move along the width of the second curved channel 113 of the air inlet 110, thereby adjusting the width ratio of the inner air inlet channel 1130 to the outer air inlet channel 1131 of the air inlet 110. This allows the airflow velocity within the inner air inlet channel 1130 and the outer air inlet channel 1131 to be adjusted, thereby adjusting the thickness ratio and flow velocity of the upper and lower airflow layers within the airflow channel 11.

[0095] Further, in some embodiments, please continue to see 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 provided in the gas outlet 111 .

[0096] The NMP concentration detection element is used to detect the concentration of NMP and can be an electrochemical detection element, an infrared absorption detection element or a photoionization detection element.

[0097] The concentration of NMP in the belt conveyor is relatively high. The first NMP concentration detection element 116 is used to monitor the concentration of NMP in the belt conveyor 12 in real time, reducing the risk of explosion caused by excessive NMP concentration in the housing 10. The second NMP concentration detection element 117 is used to monitor the concentration of NMP in the exhaust gas from the electrode drying process in real time. This allows for real-time monitoring of the NMP concentration and provides timely warnings. When the NMP concentration in the coating oven 1 is too high, the air volume can be increased to control the NMP concentration.

[0098] 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.

[0099] The direction of the first vertical channel 118 is along the second direction, which is the vertical direction of the coating oven device 1 during normal installation operation, that is, Figure 1 and Figure 2 In the Z direction, the second NMP concentration detection element 117 can be inserted into 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.

[0100] 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; the plurality of first fans 20 have a belt conveyor 12 on the side away from the air flow channel 11.

[0101] The first fan 20 is used to provide air circulation. In some embodiments, the operating principle of the first fan 20 is to drive the impeller to rotate through a power device such as an electric motor. During the rotation process, the impeller exerts a force on the gas, causing the gas to gain energy, thereby generating a pressure difference, pushing the gas into the air inlet 211. After being accelerated and pressurized by the impeller, the gas is discharged from the air outlet, achieving 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 crossflow fan (also known as a crossflow fan).

[0102] The plurality of first fans 20 are spaced apart along the first direction, that is, the plurality of first fans 20 are spaced apart along the X direction. In some embodiments, the housing 10 includes multiple sections of the housing 10, and each section of the housing 10 may be provided with six first fans 20, with the six first fans 20 spaced apart along the X direction. Each first fan 20 is at least partially located within the housing 10, that is, the main body of the first fan 20 is located within the housing 10, so as to improve the fluidity of the gas within the housing 10. Gaps are formed between the multiple first fans 20 and the top wall of the housing 10, forming an airflow channel 11. The first fans 20 are used to blow the gas in the airflow channel 11 toward the tape path 12, thereby mixing the airflow with a higher NMP concentration in the tape path 12 with the airflow with a lower NMP concentration in the airflow channel 11. The spacing between adjacent first fans 20 also leaves space, allowing the fresh air (gas with a low solvent content) directed to the electrode surface by the first fans 20 to carry gas with a higher solvent (NMP) concentration into the high-flow airflow channel 11 above the housing 10, thereby being directly discharged from the housing 10. The tape path 12 is formed on the side of the multiple first fans 20 away from the airflow channel 11. That is, the multiple first fans 20 separate the airflow channel 11 from the tape path 12, and the airflow channel 11 and the tape path 12 are connected through the gaps between adjacent first fans 20. The first fans 20 are also located above the electrode.

[0103] Because the air inlet 110 is located above the housing 10, all fresh air is concentrated in the top space of the housing 10. The NMP gas left after the electrode is dried accumulates on the surface of the electrode, resulting in a higher NMP concentration near the electrode surface. The first fan 20 blows air from top to bottom, causing the fresh air to disrupt the flow field within the belt conveyor 12, carrying the air with a higher NMP concentration within the belt conveyor 12 into the airflow channel 11 above the housing 10. Furthermore, during the operation of the electrode, due to internal flow field issues, the electrode may vibrate upward and fall off the roller. The first fan 20 blows air downward, increasing the air volume and suppressing the electrode, thereby alleviating the vibration problem.

[0104] In this embodiment, multiple first fans 20 are set, and multiple first fans 20 are spaced apart along the first direction; each first fan 20 is at least partially located in the box body 10; wherein, multiple air flow channels 11 are formed between the multiple 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; the multiple 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 on 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, further reducing the solvent content on the surface of the electrode; the air outlet of the first fan 20 can play a role in suppressing the electrode and reducing the shaking of the electrode.

[0105] Further, in some embodiments, please continue to see Figure 1 and Figure 2 The coating oven device 1 also includes a plurality of support rollers 30, which are arranged in the belt conveyor 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; the second direction intersects with the first direction.

[0106] The support roller 30 supports and guides the electrode sheet, maintaining its flatness during the drying process and reducing vibration and deformation. In some embodiments, the support roller 30 can be cylindrical or have a double-tapered design to reduce the rolling load capacity of the roller edge and extend the service life of the support roller 30. It can be made of a metal material such as carbon steel or alloy steel to provide appropriate strength and hardness to withstand pressure and friction.

[0107] In the embodiment of the present application, 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 , that is, the heights of the plurality of support rollers 30 , the plurality of infrared components 40 and the plurality of first fans 20 increase gradually.

[0108] 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 electrode 200, and can press the electrode 200 on the support rollers to reduce the jitter of the electrode 200.

[0109] 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 provided for each first fan 20, and the two infrared components 40 are spaced apart along the first direction on opposite sides of the first fan 20.

[0110] 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 blowing of the first fan 20 can directly reach the corresponding support roller 30.

[0111] The first fans 20 are located above the gap between the two infrared assemblies 40 and arranged at intervals, which can alleviate the problems of low air flow rate and high solvent gas (eg, NMP gas) content between the two infrared assemblies 40 .

[0112] In this embodiment, by aligning multiple first fans 20 with multiple support rollers 30 in a one-to-one correspondence and aligning them in the second direction, the support rollers 30 can support the electrode sheet at the blowing point of the corresponding first fans 20, reducing tension caused by electrode sheet deformation; that is, the air blown by the first fans 20 presses the electrode sheet against the support rollers 30. By providing two infrared assemblies 40 corresponding to each first fan 20, and the two infrared assemblies 40 are spaced apart along the first direction (X direction) on opposite sides of the first fan 20, the first fans 20 can blow the first gas with a low NMP concentration in the airflow channel 11 toward the belt conveyor 12 along the gap between the first fans 20 and the two adjacent infrared assemblies 40, thereby driving the second gas with a higher solvent (such as NMP) concentration in the belt conveyor 12 to flow and mix with the first gas, thereby improving ventilation and drying effects. This can also reduce the phenomenon of the electrode sheet fluctuating in the airflow channel 11 below the housing 10.

[0113] 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.

[0114] 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 end 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 end 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.

[0115] The infrared lamp cover 41 is used to protect the infrared lamp tube ( Figure 3 The infrared lampshade 41 is a quartz glass lampshade, a ceramic lampshade, a metal reflective lampshade, and the like. ...

[0116] Furthermore, along the first direction, the guide channel 411 is provided only on one side of the infrared lamp housing 41 near the first fan 20. The port at the top of the guide channel 411 is used to guide a portion of the airflow blown out by the first fan 20, and the port at the bottom of the guide channel 411 is used to direct a portion of the airflow blown out by the first fan 20 toward the bottom of the infrared assembly 40. For example, the guide channel 411 can be formed by configuring the sidewalls of the infrared lamp housing 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 assembly 40. Optionally, the guide channel 411 can gradually narrow from top to bottom to increase the wind force or speed of the air flowing out toward the bottom of the infrared assembly 40, thereby better dispersing the solvent (e.g., NMP) gas at the bottom of the infrared assembly 40.

[0117] Specifically, when air is blown from the air inlet 110, the first fan 20 directs air from the upper airflow channel 11 into the lower belt conveyor 12, reducing the concentration of the solvent (e.g., NMP) on the surface of the electrode 200. A guide channel 411 is provided on the sidewall of the infrared lamp housing 41 near the first fan 20, allowing air to flow along the sidewall of the infrared lamp housing 41, reducing resistance and increasing fluidity. Solvent (e.g., NMP) gas in the lower belt conveyor 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. Furthermore, if the overall concentration of solvent (e.g., NMP) gas within the housing 10 increases, the air intake can be increased by adjusting the damper at the air inlet 110, thereby reducing the solvent (e.g., NMP) concentration.

[0118] In this embodiment, since solvent gas (such as NMP gas) is more likely to accumulate at the bottom of the infrared component 40, the concentration of the solvent there is relatively high. Through the setting of the infrared lamp cover 41 and the guide channel 411, 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, which can reduce the solvent concentration below the infrared component 40 and reduce the temperature at the bottom of the infrared component 40.

[0119] In some embodiments, the interior of the box 10 only has an air flow channel 11 disposed above the tape path 12 .

[0120] The interior of the housing 10 only has an airflow channel 11 disposed above the tape path 12, that is, the airflow channel 11 is disposed only above the housing 10. This can reduce the phenomenon of the pole piece 200 fluctuating up and down in the airflow channel 11. It is understood that if an airflow channel 11 is also disposed below the housing 10, that is, there is also an airflow channel 11 below the tape path 12, the airflow in the airflow channel 11 below the tape path 12 will blow upward, causing the pole piece to separate from the support roller 30, causing up and down fluctuations. It is understood that the bottom of the housing 10 is the space inside the housing 10 close to the bottom wall of the housing 10 when the coating oven device 1 is in use.

[0121] Alternatively, see Figure 4 , Figure 4 Schematic diagram of the flow path 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 within the housing 10; the housing 21 defines a flow path 210; and the impeller 22 is disposed within the flow path 210. The circle containing the arcuate inner surface of the flow path 210 is eccentric relative to the circle containing the impeller 22.

[0122] 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 to allow the still air to be transmitted along the flow channel 210, with the air entering from one side and exiting from the other side. In some embodiments, the impeller 22 includes blades, which are curved in shape and are used to do work on the air, wherein the number, shape and angle of the blades can be designed according to different application requirements. Furthermore, 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 inward, 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.

[0123] 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 in a directional manner along the flow channel 210, which promotes the mixing of gas and solvent, and brings the mixed gas to the air flow channel 11 and discharges it, thereby reducing the solvent concentration on the surface of the pole piece 200.

[0124] In some embodiments, the flow channel 210 has an air inlet 211 and an air outlet 212 , and an adjusting member 215 is provided 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 .

[0125] The adjustment member 215 may be a plate-like structure inserted from the side wall of the air outlet 212, capable of moving relative to the side wall of the air outlet 212, thereby adjusting the opening of the air outlet 212. Furthermore, in some embodiments, the adjustment 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 open, 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 from 30 to 60 degrees.

[0126] 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.

[0127] Because the flow channel 210 has an air inlet 211 and an air outlet 212, the arcuate surface of the inner surface of the flow channel 210 can be divided into at least two arcuate surfaces. Optionally, in some embodiments, the arcuate surface of the inner surface of the flow channel 210 includes a first arcuate surface 213 and a second arcuate surface 214 opposite to each other, and the circle on which the first arcuate surface 213 and the circle on which the second arcuate surface 214 are located are both eccentrically disposed relative to the circle on which the impeller 22 is located; along the direction from the air inlet 211 to the air outlet 212, the eccentric direction of the circle on which the first arcuate surface 213 is located relative to the circle on which the impeller 22 is located is opposite to the eccentric direction of the circle on which the second arcuate surface 214 is located relative to the circle on which the impeller 22 is located.

[0128] The first curved surface 213 and the second curved surface 214 arranged opposite to each other constitute 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.

[0129] 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 are both provided with a flexible covering layer.

[0130] 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 blower 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 blower 20 are made of aluminum alloy. The aluminum alloy has a low friction coefficient and can reduce the sparks generated by friction. At the same time, it has good electrical conductivity and thermal conductivity, which can quickly dissipate the heat generated by friction and reduce 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.

[0131] In this embodiment, the casing 21 and the impeller 22 are made of aluminum alloy, and both the inner surface of the casing 21 and the outer surface of the impeller 22 have flexible covering layers, which can reduce the occurrence of fire.

[0132] Further, in some embodiments, see Figure 5 and Figure 6 ,in, Figure 5 Schematic diagram of the three-dimensional structure of the first fan 20 provided in some other embodiments of the present application; Figure 6 This is a schematic structural diagram of the assembly of the first fan 20 and the box body 10 provided in some embodiments.

[0133] 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.

[0134] The motor 23 is used to provide torque and 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.

[0135] The magnetic wheel 24 connects the motor 23 and the rotating shaft 25 for transmission. The magnetic wheel 24 uses the principle that like poles repel and opposite poles attract to convert repulsion into driving force. Specifically, the magnetic wheel 24 includes an active magnetic wheel 240 and a passive magnetic wheel 241. The active magnetic wheel 240 is connected to the motor 23, and the passive 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 passive magnetic wheel 241. When stationary, the S and N poles of the active magnetic wheel 240 and the passive 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 it generates interacts with the magnetic field of the passive magnetic wheel 241, and uses the mutual repulsion of like poles and the attraction of opposite poles to drive the passive magnetic wheel 241 to rotate synchronously, thereby realizing contactless transmission of power and reducing the risk of friction and slipping during use.

[0136] 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 the impeller 22 shaking caused by the coaxiality error and the friction of the coupling generating sparks and causing an explosion when the coupling is used for traditional transmission.

[0137] Alternatively, 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, and the driving shaft 230 of the motor 23 passes through the avoidance hole 13 and is connected to the magnetic wheel 24, and a seal 26 is provided between the driving shaft 230 of the motor 23 and the hole wall of the avoidance hole 13.

[0138] Since the motor 23 is arranged outside the box body 10 and the magnetic wheel 24 is arranged inside the box body 10, an avoidance hole 13 needs to be opened on the side wall of the box body 10 so that the drive 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 likely to be a gap between the drive shaft 230 of the motor 23 and the hole wall of the avoidance hole 13. Therefore, there is a risk of gas leakage in the box body 10.

[0139] The seal 26 is a component made of a material with elastic and sealing properties, such as a rubber seal, a polytetrafluoroethylene seal, or a silicone seal, and is used to fill the gap between the drive shaft 230 and the avoidance hole 13 to form a sealed 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.

[0140] Optionally, in some embodiments, the seal 26 further extends to the inner surface of the side wall of the housing 10. Specifically, the seal 26 includes a first sealing ring 261 and a second sealing ring 262, wherein the inner diameter of the first sealing ring 261 is smaller than the inner diameter of the second sealing ring 262. The first sealing ring 261 fills the gap between the drive shaft 230 and the avoidance hole 13, and the second sealing ring 262 adheres to the inner surface of the side wall of the housing 10, thereby further improving the sealing performance.

[0141] In this embodiment, a seal 26 is provided between the drive shaft 230 of the motor 23 and the wall of the avoidance hole 13, thereby reducing the risk of solvent gas leaking from the gap between the drive shaft 230 of the motor 23 and the wall of the avoidance hole 13 due to the flow of gas during the operation of the impeller 22.

[0142] 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 .

[0143] The shaft shield 250 is used to protect the shaft section between the magnetic wheel 24 and the housing 21 and the magnetic wheel 24, while also reducing the risk of gas leakage. The shaft shield 250 can be a hollow cylindrical structure, and the shaft section between the magnetic wheel 24 and the housing 21 is disposed within the hollow area of ​​the shaft shield 250.

[0144] In this embodiment, a shaft protection cover 250 is provided on the outside of the shaft section of the shaft 25 located between the magnetic wheel 24 and the housing 21; the shaft protection cover 250 is provided on the outside of the magnetic wheel 24 at one end close to the motor 23, thereby protecting the shaft section between the magnetic wheel 24 and the housing 21 and the magnetic wheel 24, and also reducing the risk of gas leakage.

[0145] Alternatively, see Figure 6 In some embodiments, the first fan 20 includes, in addition to the housing 21 and the impeller 22, 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.

[0146] The impeller 22 can be detachable, and the lengths of the multiple impeller segments 220 can be adjusted as needed without affecting the overall rigidity of the impeller 22. The multiple impeller segments 220 are assembled and mounted on the rotating shaft 25, thereby reducing the difficulty in manufacturing the impeller 22 due to its excessive length. In some embodiments, the width of the housing 10 is relatively long, and the span of the first fan 20 is correspondingly longer. The segmented impeller 22 can better withstand various external forces during transportation and installation, reduce the possibility of deformation, and improve the stability and reliability of the impeller 22 in long span situations.

[0147] In this embodiment, by configuring the impeller 22 to include a plurality of impeller segments 220 , which are mounted 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.

[0148] Further, in some embodiments, please continue to see Figure 4 The distance between the inner surface of the flow channel 210 and the impeller 22 is 2.5 mm to 4 mm. This reduces the probability of sparks caused by collisions and ensures that the first fan 20 has a certain air output intensity. 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 collisions increases. 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 intensity of the first fan 20 is too low.

[0149] 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; multiple first fans 20 are arranged at intervals along the first direction; an air flow channel 11 is formed between the multiple 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.

[0150] An air flow channel 11 is formed between the first fan 20 and the top wall of the box 10. Therefore, the first fan 20 is arranged above the tape transport channel 12. The first fan 20 can blow air from the upper air flow channel 11 to the lower tape transport channel 12, driving the air flow channel 11 and the gas to mix with the gas flow in the tape transport channel 12. In some embodiments, the moving speed of the pole piece 200 on the tape transport channel 12 is greater than 100 meters per minute, and the pole piece 200 is prone to ups and downs. The first fan 20 blows air from the upper air flow channel 11 to the lower tape transport channel 12, which can press the pole piece 200 onto the support roller 30, reduce the vibration of the pole piece 200, and improve the quality of the pole piece 200.

[0151] This embodiment can enable the first fan 20 to blow air from the top to the bottom, which can suppress the pole piece 200 and reduce the shaking of the pole piece 200; it is beneficial for the new air to disrupt the flow field of the belt 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.

[0152] Furthermore, 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 at intervals in the tape walkway 12 along the first direction; the plurality of infrared components 40 are arranged at intervals in the tape walkway 12 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.

[0153] In this way, on the one hand, the infrared component 40 can heat and dry the electrode 200, which is beneficial to the drying of the electrode 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 channel 12, further improving the drying efficiency, and can press the electrode 200 on the support roller 30 to reduce the shaking of the electrode 200.

[0154] Optionally, see also Figure 7 , Figure 7 Schematic diagrams of the coating oven device 1 according to other embodiments of the present application. The coating oven device 1 comprises a housing 10, an infrared module 40, and a cooling module 50, with at least a portion of the infrared module 40 disposed within the housing 10. The cooling module 50 includes an air inlet duct 51 and an air outlet duct 52, both of which are in communication with the interior of the infrared module 40.

[0155] The structures of the housing 10 and infrared module 40 are similar to those in the previous embodiment and will not be further described here. The cooling module 50 is used to regulate the temperature of the infrared module 40, reducing the risk of explosion of solvent (e.g., NMP) gas within the infrared module 40 due to overheating. In some embodiments, the cooling module 50 is located at or below the bottom of the housing 10, and the airflow channel 11 is absent from the bottom or below of the housing 10. The bottom of the housing 10 is the side of the housing 10 closest to the bottom surface when the coating oven apparatus 1 is in use.

[0156] Cooling assembly 50 can be implemented using either a liquid cooling system or an air cooling system. Liquid cooling systems circulate a liquid (usually water or coolant) through cooling plates or pipes, absorbing heat and transferring it to an external cooling device. Liquid cooling systems are suitable for applications where high heat generation and precise temperature control are required. Air cooling systems utilize a fan or blower to move air over the heat source, removing heat. These systems are simple and low-cost.

[0157] In some embodiments of the present application, the cooling assembly 50 is an air-cooling system. Specifically, the cooling assembly 50 can deliver cool air (e.g., air) to the interior of the infrared assembly 40 via an air inlet duct 51. After the cool air enters the infrared assembly 40, it removes excess heat generated by the infrared assembly 40 during operation and then passes through an air outlet duct 52 to maintain thermal balance and air circulation within the housing 10. Therefore, the air delivered by the air inlet duct 51 is cool air, while the air in the air outlet duct 52 is heated due to the absorption of heat from the infrared assembly 40.

[0158] In this embodiment, the coating oven device 1 includes a box body 10, an infrared component 40 and a cooling component 50, at least part of the infrared component 40 is arranged in the box body 10, and the cooling component 50 includes an air inlet pipe 51 and an air outlet pipe 52; the air inlet pipe 51 and the air outlet pipe 52 are both connected to the interior of the infrared component 40, so that the box body 10 can accommodate and protect the various components inside, while providing 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 box body 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 gas problem in the box body 10 and improve the stability of the coating oven device 1.

[0159] In some embodiments, the box body 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 cavity 123 , and the first outlet branch 520 of the outlet pipe 52 is connected to the negative pressure cavity 123 .

[0160] The negative pressure chamber 123 is a chamber with an internal pressure lower than the external atmospheric pressure. By reducing the internal pressure, a large amount of external cold air will not enter the space inside the box body 10 through the electrode inlet 120 and the electrode outlet 121. The negative pressure chamber 123 can be achieved 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.

[0161] 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 is communicated with the pole piece inlet 120, the other end of the negative pressure chamber can be connected to the first air outlet branch 520, and the third end of the negative pressure chamber 123 can be connected to another pipe, 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.

[0162] The first outlet branch 520 of the outlet pipe 52 is used to transport a portion of the high-temperature gas within the outlet pipe 52. The outlet port of the first outlet branch 520 of the outlet pipe 52 can communicate with the negative pressure chamber 123 through the electrode inlet 120. The high-temperature gas entering the negative pressure chamber 123 from the first outlet branch 520 mixes with the cold air entering the negative pressure chamber 123 from the environment, thereby maintaining a certain temperature within the negative pressure chamber 123.

[0163] In this embodiment, a negative pressure chamber 123 is provided at least one of the electrode inlet 120 and the electrode 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 electrode inlet 120 or the electrode outlet 121. This can increase the temperature of the negative pressure chamber 123, reduce the risk of the cold air inhaled by the negative pressure chamber 123 mixing with the high-temperature solvent (such as NMP) gas entering the negative pressure chamber 123 from the electrode inlet 120 or the electrode outlet 121 to form condensate, and thereby reduce the condensate (such as NMP) at the electrode inlet 120 or the electrode outlet 121.

[0164] Optionally, in some embodiments, the coating oven device 1 further 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 for detecting the temperature in the negative pressure chamber 123; an air regulating valve (not shown) is provided 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 to adjust the air flow on the first air outlet branch 520.

[0165] The first temperature measuring element is a sensor used to detect the temperature within negative pressure chamber 123. It can convert temperature changes into electrical signals to provide temperature data for subsequent circuit control. The first temperature measuring element can be a thermocouple, thermistor, resistance temperature detector (RTD), or integrated temperature sensor (IC).

[0166] The control circuit is a circuit for controlling the working state and operation mode of relevant components in the coating oven device 1. The control circuit can send control signals based on the received electrical signals to regulate the operation of the relevant components.

[0167] The gas regulating valve is a valve used to adjust the flow of gas. It can be controlled by changing the valve opening. The gas regulating valve is located on the first outlet branch 520 and adjusts the airflow according to the instructions of the control circuit to maintain stable temperature and pressure within the negative pressure chamber 123. It is understood that if the temperature within the negative pressure chamber 123 is too high, the amount of gas entering the negative pressure chamber 123 through the first outlet branch 520 can be reduced; if the temperature within the negative pressure chamber 123 is too low, the amount of gas entering the negative pressure chamber 123 through the first outlet branch 520 can be increased.

[0168] In this embodiment, since the coating oven device 1 also 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 outlet 200.

[0169] In some embodiments, the interior of the box body 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 box body 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 and the air inlet 110 of the first heat exchanger 70 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 part 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.

[0170] During drying of the positive electrode plate 200, in some applications, the positive electrode plate 200 may release flammable and explosive gaseous solvents, such as NMP gas. If the NMP gas cannot be discharged in a timely manner, there is a risk of explosion. NMP gas is also toxic and poses a threat to human health. Therefore, the NMP gas needs to be recovered. The condensation recovery assembly 60 is used to cool the NMP-rich gas, causing the NMP gas to condense and precipitate. The temperature of the gas after passing through the condensation recovery assembly 60 is reduced.

[0171] 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, thereby recovering the heat of this portion of the high-temperature gas and improving energy utilization.

[0172] The first heat exchanger 70 is a device used to transfer heat between fluids (such as gases) at different temperatures. Its operating principle is based on heat conduction and convection, transferring heat from a high-temperature fluid to a low-temperature fluid through a solid wall or medium. In this embodiment, at least a portion of the low-temperature gas after passing through the condensation recovery assembly 60 reaches the first heat exchanger 70. After heat exchange with the high-temperature gas in the second outlet branch 521 of the outlet pipe 52, the temperature of the gas increases, and the gas then enters the air flow channel 11 through the air inlet 110 for recycling.

[0173] 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, although the temperature is increased, 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. 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.

[0174] 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 condenses into a liquid and is discharged, and the remaining gas is recovered; and the gas in the air outlet pipe 52 that is heated by the cooling infrared component 40 exchanges heat with the aforementioned condensed and recovered gas through the first heat exchanger 70, so that 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.

[0175] 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.

[0176] The purification wheel 64 removes solvents (such as NMP) from the exhaust gas by adsorption. The purification wheel 64 can be a zeolite wheel. In some embodiments, the workflow of the purification wheel 64 involves an adsorption stage, a desorption stage, and a regeneration stage. 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, desorbing the adsorbed solvent (such as NMP) to form a high-concentration exhaust gas. In the regeneration stage, the zeolite wheel is cooled in the cooling zone after desorption to restore its adsorption performance and prepare for the next round of adsorption.

[0177] 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 to 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.

[0178] 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.

[0179] 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.

[0180] Further, in some embodiments, please continue to see 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 exchanges heat with the gas passing through the second heat exchange channel of the second heat exchanger 71 and then enters the condensation recovery component 60; after passing through the condensation recovery component 60, a part of the gas 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.

[0181] 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 .

[0182] In this embodiment, the gas passing through the first heat exchange channel of the second heat exchanger 71 is heat exchanged with the gas passing through the second heat exchange channel of the second heat exchanger 71, and then enters 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. A portion of the gas after passing through the condensation recovery component 60 is passed through the second heat exchange channel of the second heat exchanger 71 and heat exchanged with the gas passing through the first heat exchange channel of the second heat exchanger 71 before entering 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. At the same time, the heat obtained when cooling the infrared component 40 is utilized, and the heat of the gas discharged from the air flow channel 11 is also utilized. When this portion of the gas enters the box body 10 again, it does not need to obtain too much additional energy.

[0183] Furthermore, in some embodiments, the housing 10 has a pole piece inlet 120 and a pole piece outlet 121 opposite to each other, each of which is provided with a negative pressure cavity 123, which is in communication with 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, thereby improving energy utilization.

[0184] Further, in some embodiments, please continue to see Figure 7 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; two adjacent air intake ducts 51 are connected through a spare duct 53, and a valve 54 is provided on the spare duct 53.

[0185] The second fan 55 is a component that achieves air circulation and heat transfer, and cools 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 high-speed airflow through the rotation of a second impeller. Its operating principle is based on the conversion of centrifugal force and airflow energy. When the second motor drives the second impeller to rotate at high speed, the gas between the second blades is affected by centrifugal force and is thrown toward the edge of the second impeller, forming a high-speed airflow. A low-pressure area is formed at the center of the second impeller, and external gas is continuously sucked in through the second air inlet under the action of atmospheric pressure. The gas thrown to the edge of the second impeller is guided by the casing and discharged from the second air outlet, while obtaining higher pressure and speed. 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, achieving gas transportation and pressurization.

[0186] Each second fan 55 can cool at least two infrared assemblies 40 simultaneously. In some embodiments of the present application, each second fan 55 cools three infrared assemblies 40. The air inlet duct 51 is used to deliver the cold air provided by the second fan 55 to the infrared assemblies 40. The air inlet duct 51 delivers the cold air to the infrared assemblies 40 through multiple branches (three branches in this embodiment).

[0187] To reduce the risk of sudden failure of the second blower 55 during operation, resulting in insufficient cooling of the corresponding infrared assembly 40, which could overheat and rupture the infrared assembly 40, or ignite the solvent (such as NMP) and cause an explosion, this embodiment provides a backup duct 53 between two adjacent air inlet ducts 51. This backup duct 53 can replenish fresh air in the event of a failure of one of the second blowers 55. A valve 54 is provided on the backup duct 53. This valve is closed when the second blower 55 is operating normally, and opens in the event of a failure, automatically replenishing air.

[0188] In addition, some embodiments further provide two thermocouples to monitor the temperature of the infrared lamp tube and the temperature of the outer surface of the infrared lamp cover 41. If the temperature exceeds the threshold, the system will be shut down directly (i.e., the electrode tape and infrared heating will be stopped), and the cooling system will continue to work.

[0189] In this 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 one second fan 55 can be used to cool at least two infrared components 40, reducing the use of the second fan 55; the two adjacent air intake ducts 51 are connected through a spare duct 53, and a valve 54 is provided on the spare duct 53. When an abnormality occurs in one of the air intake ducts 51 and / or the second fan 55, 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, reducing the risk of fire due to untimely cooling of the infrared component 40.

[0190] Furthermore, in some embodiments, the coating oven apparatus 1 further includes a control circuit (not shown); the second fans 55 and valves 54 are both electrically connected to the control circuit. The control circuit is configured to, in response to a malfunction in one of the second fans 55 , control the opening of the valve 54 on the standby pipe 53 adjacent to and connected to the malfunctioning second fan 55 . In this manner, the valve 54 on the standby pipe 53 can be dynamically and intelligently adjusted based on the actual operating status of the second fans 55 .

[0191] Alternatively, in some embodiments, the control circuit is configured to control the valves 54 on all the backup ducts 53 to open in response to an abnormal operation of one of the second fans 55. In this way, adjacent air intake ducts 51 can share airflow in pairs, thereby reducing the temperature of the infrared assembly 40.

[0192] In some embodiments, please see Figure 8 The infrared component 40 includes an infrared lampshade 41 ; air inlet and air outlet are provided at both ends of the infrared lampshade 41 , the air inlet is connected to the air inlet pipe 51 , and the air outlet is connected to the air outlet pipe 52 .

[0193] 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 rectangular. 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.

[0194] Infrared lamp housing 41 is provided with air inlet and outlet holes at both ends, allowing air to enter and exit from both ends, improving heat dissipation efficiency. The air inlet holes communicate with air inlet duct 51, and the air outlet holes communicate with air outlet duct 52. Therefore, cool air in air inlet duct 51 can be transported to infrared lamp housing 41 through the air inlet holes. Since infrared lamp housing 41 encloses the infrared lamp, the cool air transported to infrared lamp housing 41 cools the entire infrared component 40. The hot air after cooling the infrared component 40 is then transported to air outlet duct 52 through the air outlet holes.

[0195] 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 and air outlet at both ends of the infrared lamp cover 41, the air inlet is connected to the air inlet pipe 51, and the air outlet is 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.

[0196] 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 inside 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.

[0197] The structures and functions of the box 10 and the infrared component 40 are similar to those in the aforementioned embodiment and will not be described again here.

[0198] Bracket 80 is a support structure installed within housing 10 and is used to support infrared components 40. Bracket 80 can be made of a high-strength material such as metal. In the embodiment of the present application, bracket 80 can simultaneously mount multiple infrared components 40, enabling simultaneous movement of multiple infrared components 40, improving the parallelism of multiple infrared components 40, and improving the consistency of the distance between the infrared components 40 and the corresponding pole pieces 200.

[0199] The drive 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 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 drive mechanism, a chain drive mechanism, a screw drive mechanism, etc.

[0200] In this embodiment, the bracket 80 is driven to move by the driving component, which can drive multiple infrared components 40 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.

[0201] Furthermore, in some embodiments, the bracket 80 includes a base 81 and multiple pairs of lampshade seats 82; the multiple pairs of lampshade seats 82 are spaced apart on the base 81; the two lampshade seats 82 of each pair of lampshade seats 82 are spaced apart at opposite ends of the base 81; wherein, an infrared component 40 is installed on each pair of lampshade seats 82.

[0202] The base 81 is a flat plate structure or a frame structure, which has a 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 component 40 and the electrode 200, and thus improve the consistency of the heating speed of each electrode 200. Furthermore, in some embodiments, the base 81 is a square tube frame weldment. The square tube frame weldment 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.

[0203] 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 image 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 them, the aluminum alloy material is light in weight, easy to process and install, and has good thermal conductivity, which can dissipate part of the heat generated by the infrared component 40; the stainless steel material has higher 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.

[0204] Multiple pairs of lampshade holders 82 are spaced apart on the base 81, with the two lampshade holders 82 of each pair spaced apart at opposite ends of the base 81. This spacing effectively distributes the positions of the infrared components 40, ensuring that infrared radiation evenly irradiates the electrode 200 and improving the uniformity of the drying effect. Furthermore, the appropriate spacing facilitates the installation, maintenance, and replacement of the infrared components 40, providing a dedicated mounting location for the infrared components 40. Through specific connection methods (such as bolts or snap-fit ​​connections), the infrared components 40 are securely fixed to the lampshade holders 82, reducing the probability of displacement or shaking of the infrared components 40 during operation and improving the stability and accuracy of infrared radiation.

[0205] In this embodiment, since the bracket 80 includes a base 81 and multiple pairs of lampshade seats 82; the multiple pairs of lampshade seats 82 are arranged at intervals on the base 81; the two lampshade seats 82 of each pair of lampshade seats 82 are arranged at opposite ends of the base 81; wherein, an infrared component 40 is installed on each pair of lampshade seats 82, so that the stability of the corresponding infrared component 40 can be improved through each pair of lampshade seats 82, and multiple infrared components 40 can also be installed on the same base 81 through the lampshade seats 82, which is conducive to the simultaneous movement and adjustment of multiple infrared components 40.

[0206] In some embodiments, multiple pairs of lampshade holders 82 are spaced apart along a first direction; the driving assembly is used to drive the bracket 80 to move up and down along a second direction; and the second direction intersects with the first direction.

[0207] 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 assembly drives the bracket 80 to move up and down along the second direction, that is, the driving assembly drives the bracket 80 to move up and down along the vertical direction, thereby adjusting the distance between the plurality of infrared components 40 and the plurality of pole pieces 200.

[0208] In this embodiment, by spacing multiple pairs of lampshade holders 82 along the first direction, the spacing arrangement can reasonably distribute the positions of the infrared components 40. The lampshade holders 82 facilitate positioning of the infrared components 40, so that multiple infrared components 40 are arranged in an orderly manner on the bracket 80, thereby helping to optimize the infrared radiation range and intensity distribution, allowing the electrode 200 to be dried under uniform infrared radiation, thereby improving drying quality and efficiency. At the same time, the appropriate spacing also facilitates the installation, maintenance, and replacement of the infrared components 40.

[0209] 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 .

[0210] The drive assembly is disposed above the housing 10, i.e., above the exterior of the housing 10. The drive assembly can drive the bracket 80 to move vertically as a whole by lifting. 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 to the base 81 to improve stability during the lifting process. In some embodiments, the lifting screw 91 can be used at each of the four corners of the bracket 80 for lifting. In some embodiments, the lifting screw 91 can be used in conjunction with the lifting nut 92.

[0211] In this embodiment, the drive assembly is arranged above the box body 10 and 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 belt-threading trolley, and the lifting of the bracket 80 does not hinder the installation and maintenance of the infrared assembly 40.

[0212] Optionally, in some embodiments, the lampshade holder 82 has a first hollow portion 820 .

[0213] The first hollow portion 820 refers to a hole, gap or transparent area 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.

[0214] 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.

[0215] 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 .

[0216] The adjustment bolt 83 is an adjustment structure that passes through a pre-set screw hole in the lampshade holder 82 or is connected to the lampshade holder 82. One end of the adjustment bolt 83 can contact or connect with the lampshade holder 82, while the other end is exposed outside the lampshade holder 82 for easy operation. In some embodiments, the adjustment bolt 83 can be used in conjunction with a nut, washer, etc. to enhance the stability of the connection and improve the accuracy of adjustment.

[0217] In this embodiment, by providing 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 is irradiated to 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.

[0218] In some embodiments, please see Figure 9 The bracket 80 also includes a second temperature measuring element 84 for detecting the temperature of the infrared component 40.

[0219] The second temperature measuring element 84 can be an infrared temperature sensor, which uses non-contact measurement and can measure 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, which is transmitted to the control system. The system adjusts the operating state of the infrared component 40 based on 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 the device if the temperature exceeds the threshold, thereby improving the reliability of the coating oven device 1. If the temperature is too low, the power is appropriately increased to maintain drying efficiency.

[0220] 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, which 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.

[0221] Further, in some embodiments, please continue to see Figure 1 The coating oven device 1 also includes a plurality of first fans 20; the box body 10 has relative electrode inlets 120 and electrode outlets 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 air flow channel 11 is formed between the plurality of first fans 20 and the top wall of the box body 10, and the plurality of first fans 20 have a tape channel 12 on the side away from the air flow channel 11; the first fans 20 are used to blow the gas in the air flow channel 11 to the tape channel 12; a plurality of infrared components 40 are arranged at intervals in the tape channel 12 along the first direction; the second temperature measuring element 84 is arranged on the side of the infrared component 40 away from the air flow channel 11.

[0222] 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 path 12 are similar to those in the previous embodiment and will not be described in detail here.

[0223] The side of the infrared component 40 away from the air flow channel 11 is an area with a high content of solvent gas (for example, NMP gas). Therefore, the second infrared component 40 detects the area with a high content of solvent gas. In this way, the phenomenon of explosion or combustion of solvent gas in this area due to the excessively high temperature of the infrared component 40 is reduced, thereby improving the stability of the coating oven device 1.

[0224] In this embodiment, since an air flow channel 11 is formed between the multiple first fans 20 and the top wall of the box body 10, a belt conveyor 12 is provided on the side of the multiple first fans 20 away from the air flow channel 11; the first fans 20 are used to blow the gas in the air flow 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 fresh air to disrupt the flow field of the belt conveyor 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; by arranging the multiple infrared components 40 in the belt conveyor 12 at intervals along the first direction, the drying efficiency and energy utilization can be taken into account; by arranging the second temperature measuring element 84 on the side of the infrared component 40 away from the air flow channel 11, the phenomenon of solvent gas explosion or combustion caused by excessively high temperature of the infrared component 40 in the area with high solvent gas content can be reduced, thereby improving the stability of the coating oven device 1.

[0225] Alternatively, in some embodiments, see Figure 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 at intervals on the base 81; the two lampshade seats 82 of each pair of lampshade seats 82 are arranged at opposite ends of the base 81; multiple support rods 86 are arranged at intervals on the base 81; 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 the side of the infrared component 40 away from the air flow channel 11.

[0226] The infrared detection brackets 85 are used to support the second temperature measuring element 84, and the support rods 86 are used to mount the second temperature measuring element 84. Specifically, in one embodiment, two support rods 86 can be mounted on each pair of infrared detection brackets 85, and the second temperature measuring element 84 is respectively mounted on the two support rods 86, so that the second temperature measuring element 84 is not easily rotated. Alternatively, in another embodiment, the support rods 86 are prisms, and the second temperature measuring element 84 is mounted on the prisms, which is not easily rotated, thereby improving the stability and accuracy of the measurement.

[0227] The temperature sensing end of the second temperature measuring element 84 extends to the side of the infrared assembly 40 away from the airflow channel 11. In other words, the temperature sensing end of the second temperature measuring element 84 extends below the infrared assembly 40. In one embodiment, the temperature sensing end of the second temperature measuring element 84 is placed in contact with the bottom surface of the infrared assembly 40. Due to the obstruction of the infrared assembly 40, the area below the infrared assembly 40 has a high solvent gas content, which can easily cause an explosion if the temperature rises too high. Therefore, temperature monitoring of the area below the infrared assembly 40 is particularly important.

[0228] 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.

[0229] Optionally, in some embodiments, the base 81 has a second hollow portion 810 .

[0230] The second hollow portion 810 may be opened 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 .

[0231] In this embodiment, by providing a 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 .

[0232] In some embodiments, the bottom of the base 81 has a flexible pad (not shown).

[0233] The flexible pads absorb vibration and impact, protecting the base 81 and its mounted components. They also provide a cushion when the base 81 is lowered, reducing the risk of the bracket 80 directly contacting the ground and deforming under stress, which could degrade the bracket 80's accuracy. They can be made of rubber, silicone, or plastic. In some embodiments, the flexible pads are made of Teflon, a material known for its high-temperature resistance, resistance to aging, and resistance to deformation.

[0234] 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, 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.

[0235] Furthermore, in some embodiments, the coating oven device 1 further includes a safety cylinder (not shown), which is connected to the bracket 80 .

[0236] The safety cylinder is a device based on the pneumatic drive principle, which converts the pressure energy of compressed air into mechanical energy through the movement of the piston in the cylinder 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. The end cover may also be provided with an inlet and outlet port 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.

[0237] 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 .

[0238] Alternatively, see Figure 1-Figure 2 and Figure 10-12 , Figure 10 A schematic diagram of the three-dimensional structure of the first fan 20 provided in some further embodiments of the present application; Figure 11 for Figure 10 An exploded schematic diagram of the first fan 20; Figure 12 for Figure 10 Specifically, the coating oven device 1 in this embodiment includes a housing 10 and a first fan 20; at least a portion of the first fan 20 is disposed in the housing 10; wherein the first fan 20 is a bladeless first fan.

[0239] 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.

[0240] In this embodiment, by applying the bladeless first blower 20 to the coating oven device 1, the risk of sparks caused by the blower's blades colliding with the outer casing is reduced, thereby reducing the risk of gas explosion within the housing 10. Furthermore, compared to conventional blowers, the bladeless first blower 20 provides a greater air volume, saving more energy. Furthermore, placing the bladeless first blower 20 within the housing 10 breaks up the high horizontal wind speed area above the lampshade caused by the large air volume, promoting the mixing of gas and solvent, and bringing the mixed gas to the upper part of the housing 10 for exhaust, thereby more effectively reducing the solvent concentration on the surface of the electrode 200.

[0241] 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.

[0242] The motor 23 is the power source, driving the magnetic wheel 24 to rotate, thereby driving the blower assembly 2000. In some embodiments, the motor 23 includes a stator, a rotor, end caps, and bearings. The stator is the stationary portion of the motor 23 and consists of an iron core and windings. The windings are fed with current to generate a magnetic field. The rotor is the rotating portion of the motor 23 and includes an iron core and windings. The stator's magnetic field generates a rotational torque. The end caps support the bearings and protect the internal structure of the motor 23. The bearings ensure the rotor's flexible rotation. The motor 23 can be a DC motor or an AC motor.

[0243] The magnetic wheel 24 is directly connected to the motor 23 and is made of high-strength magnetic material 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. Figure 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 both the active magnetic wheel 240 and the driven magnetic wheel 241. When 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 it generates 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. In this process, there is no direct mechanical connection between the active magnetic wheel 240 and the driven magnetic wheel 241, but power is transmitted through the magnetic field as a medium.

[0244] 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.

[0245] 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.

[0246] In this embodiment, since the interior of the oven may contain a large amount of flammable and explosive solvent gas, the magnetic wheel 24 can achieve contactless transmission through the provision of the magnetic wheel 24. Compared with the related technology using coupling transmission, this embodiment can reduce the risk of friction that may generate sparks and cause explosions.

[0247] Further, in some embodiments, see further Figure 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 outside of the impeller 22 and is spaced apart from the impeller 22; wherein the impeller guard 28 is connected to the bladeless fan 27.

[0248] The rotating shaft 25 is used to transmit the rotational power generated by the motor 23 to the impeller 22, enabling the impeller 22 to rotate at high speed. The rotation of the impeller 22 generates centrifugal force, which draws air in and accelerates its discharge, providing sufficient air volume and pressure for the bladeless fan 27. In some embodiments, the rotating shaft 25 can be a metal rod with a certain strength and toughness. One end of the rotating shaft is provided with a connection structure that is compatible with the magnetic wheel 24, such as a keyway, spline, or other connection interface, for connecting with the magnetic wheel 24 to transmit torque. The other end is used to mount the impeller 22 and is provided with a thread or a slot structure to secure the impeller 22.

[0249] The impeller 22 includes a plurality of blades and a hub, wherein the plurality of blades are arranged around the hub and the blades rotate at high speed to generate airflow. The material of the impeller 22 can be metal, plastic or composite material.

[0250] The impeller guard 28 is sleeved on the outside of the impeller 22, and its shape is adapted to the impeller 22. 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 also provides an annular channel for the airflow to smoothly enter the bladeless fan 27.

[0251] 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 while also providing a vacuum chamber.

[0252] Further, in some embodiments, please continue to see Figure 12 The annular side wall of the impeller guard 28 is provided with a plurality of vent holes 281 .

[0253] Impeller guard 28 has an annular sidewall with a plurality of vents 281 therein for admitting air. The shape and size of vents 281 are not limited and can be designed as needed. In some embodiments, the plurality of vents 281 are evenly distributed along the circumference of the annular sidewall of impeller guard 28.

[0254] 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 .

[0255] Optionally, in some embodiments, the distance between the impeller shroud 28 and the impeller 22 is 2.5 mm to 4 mm.

[0256] 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 ranges from 2.5 mm to 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 the collision between the impeller guard 28 and the impeller 22 can be reduced, thereby reducing the risk of gas explosion within the housing 10 and improving the reliability of the coating oven apparatus 1.

[0257] 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 mounted on the outside of a portion of the shaft 25 and is connected to the first port.

[0258] The shaft guard 250 is a hollow protective structure that fits over the shaft 25 and protects the shaft 25. The guard 250 has a first port and a second port positioned opposite each other along the axis of the shaft 25. Thus, the shaft 25 passes through the guard 250 along the axis of the shaft 25. The guard 250 cooperates with the impeller guard 28 to provide a seal for the airflow, reducing leakage from the first port of the impeller guard 28 and allowing more air to flow from the second port to the bladeless fan 27.

[0259] In this embodiment, since the blower assembly 2000 includes a shaft guard cover 250, the shaft guard cover 250 is mounted 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 reduce the risk of gas leakage.

[0260] In some embodiments, the shaft shield 250 and the impeller shield 28 are both cylindrical; one end of the shaft shield 250 close to the motor 23 is covered outside the magnetic wheel 24 .

[0261] The shaft guard 250 is cylindrical in shape, with an inner diameter that is large enough to fit over the outside of the shaft 25, with an appropriate gap between the guard and the shaft to ensure normal rotation of the shaft 25. The impeller guard 28 is cylindrical in shape, with an inner diameter that matches the outer diameter of the impeller 22. It is designed to fit over the impeller 22, allowing the impeller 22 blades to rotate freely within it, while maintaining a certain distance from the impeller 22.

[0262] In the embodiment of the present application, by arranging the shaft protection cover 250 at one end 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.

[0263] In some embodiments, along the axis direction of the rotating shaft 25 , the distance between the rotating shaft shield 250 and the magnetic wheel 24 is 2.5 mm to 4 mm.

[0264] Along the axis of the rotating shaft 25, the spacing between the rotating shaft shield 250 and the magnetic wheel 24 refers to the distance, parallel to the centerline of the rotating shaft 25, between the end of the rotating shaft shield 250 on the side closest to the magnetic wheel 24 and the end surface of the magnetic wheel 24 closest to the rotating shaft shield 250. This spacing ranges from 2.5 mm to 4 mm, and can be, 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 collisions can be reduced, thereby improving the reliability of the coating oven apparatus 1.

[0265] In some embodiments, see Figure 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 seal 26 is provided between the driving shaft 230 of the motor 23 and the hole wall of the avoidance hole 13.

[0266] The motor 23 is arranged outside the box body 10, and the magnetic wheel 24 is arranged inside the box body 10. The drive 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.

[0267] 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.

[0268] In some embodiments, the box body 10 has a relative pole piece inlet 120 and a pole piece outlet 121 along the first direction; multiple first fans 20 are arranged at intervals along the first direction; an air flow channel 11 is formed between the multiple 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; the multiple first fans 20 have a tape channel 12 on the side away from the air flow channel 11; the first fans 20 are used to blow the gas in the air flow channel 11 to the tape channel 12.

[0269] Among them, the first fan 20 is used to blow the gas in the air flow channel 11 to the tape channel 12. On the one hand, the first fan 20 can disperse the gas with a higher solvent content in the tape channel 12 and mix it with the gas with a higher solvent content, which is beneficial to the drying of the electrode 200; on the other hand, the first fan 20 can play a role in pressing the electrode 200 and reducing the shaking of the electrode 200.

[0270] In some embodiments, 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 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.

[0271] In this way, on the one hand, the infrared component 40 can heat and dry the electrode 200, which is beneficial to the drying of the electrode 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 channel 12, further improving the drying efficiency, and can press the electrode 200 on the support roller 30 to reduce the shaking of the electrode 200.

[0272] 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.

[0273] The annular sidewall of the annular housing 29 is a hollow structure, forming an air passage within the hollow structure. When the air blower assembly 2000 delivers air into the annular housing 29, the air flows and gathers within the hollow annular sidewall. The hollow structure design helps to buffer and regulate the air, allowing the air to flow out in a more stable state.

[0274] There is a gap 291 at one end of the annular side wall close to the belt channel 12. The annular shell 29 can make the air blow out along the gap 291. It can also use the pressure difference caused by the difference in flow rate inside and outside the ring to drive the air behind the ring to blow forward. At the same time, it can also use the viscosity of the air when it flows at high speed to drag part of the air forward and blow it 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.

[0275] Along the vertical direction, the first fan 20 and the infrared component 40 are staggered, and at the same time, the gap 291 of an annular shell 29 is exposed to the tape channel 12 through the gap between two adjacent infrared components 40. In this way, each first fan 20 can correspond to two infrared components 40, and 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 air flow channel 11, and can also reduce the up and down fluctuation of the pole piece 200 in the bottom tape channel 12.

[0276] 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 the first direction and the second direction both 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.

[0277] Two short sidewalls 293 extending in a first direction (horizontally, the X direction) and two long sidewalls 292 extending in a third direction (the Z direction) are connected end to end to form a hollow annular sidewall structure. The double-wall structure provides a channel for air to flow within the annular housing 29.

[0278] 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 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 10, thereby reducing the concentration of the solvent in the gas in the belt conveyor 12 and improving the stability of the coating oven device 1.

[0279] In some embodiments, the first fan 20 includes two motors 23, two magnetic wheels 24, and two blower assemblies 2000. Along the third direction, a motor 23, a magnetic wheel 24, and a blower assembly 2000 are respectively disposed at both ends of the annular housing 29. Along the third direction, the width of the air outlet 212 of the slit first increases and then decreases. This improves the uniformity of the air output.

[0280] The electrode drying device described in the embodiment of this application is applicable to the battery production system. Figure 16 , Figure 16 A module diagram of a battery production system 1000 provided in some embodiments of the present application.

[0281] 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 the coating oven device 1 provided in any one of the above embodiments, which is used to dry the pole piece.

[0282] In some embodiments, the electrode coating device 2 can evenly apply a slurry composed of a mixture of electrode active materials (such as LiCoO2 or LiFePO4 for the positive electrode, or graphite or silicon-based materials for the negative electrode) with a conductive agent and a binder to a metal foil current collector (aluminum foil or copper foil). Furthermore, in some embodiments, the electrode coating device can include a feeding mechanism and a coating head. The feeding mechanism is used to store and transport the battery slurry and can control the slurry supply to ensure a stable supply during the coating process. The coating head is used to evenly apply the coating to the parent roll. Common coating head types include blade coating heads, slit coating heads, and comma blade coating heads.

[0283] The coating oven device 1 can dry the coated electrode, remove the solvent in the electrode, 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.

[0284] In the several embodiments provided in this 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 merely schematic. For example, the division of units is only a logical function division. In actual implementation, there may be other division methods, such as 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 interface, device or unit, which can be electrical, mechanical or other forms.

[0285] In addition, the functional units in the various embodiments of the present application may be integrated into a single processing unit, or each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or software functional units.

[0286] 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 description and drawings of this application, or directly or indirectly applied 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 plurality of first fans are arranged at intervals along a first direction; each of the first fans is at least partially located in the housing; an air flow channel is formed between the plurality of first fans and the top wall of the housing; the air flow channel has an air inlet and an air outlet; a tape path is provided on a side of the plurality of first fans away from the air flow channel; the first fans are used to blow the gas in the air flow channel toward the tape path; The first fan comprises: A shell is disposed in the box; the shell has a flow channel inside; an impeller disposed in the flow channel; In which, the circle where the arc-shaped surface of the inner surface of the flow channel is located is eccentrically arranged relative to the circle where the impeller is located; the arc-shaped surface of the inner surface of the flow channel includes a first arc-shaped surface and a second arc-shaped surface relative to each other, and the circle where the first arc-shaped surface is located and the circle where the second arc-shaped surface is located are both eccentrically arranged relative to the circle where the impeller is located; the flow channel has an air inlet and an air outlet, and along the direction from the air inlet to the air outlet, the eccentric direction of the circle where the first arc-shaped surface is located relative to the circle where the impeller is located is opposite to the eccentric direction of the circle where the second arc-shaped surface is located relative to the circle where the impeller is located.

2. The coating oven device according to claim 1, characterized in that: An adjusting member is provided on the side wall of the air outlet; the adjusting member can move relative to the side wall of the air outlet, thereby adjusting the opening of the air outlet.

3. The coating oven device according to claim 1, characterized in that: The housing and the impeller are both made of aluminum alloy, and the inner surface of the housing and the outer surface of the impeller are both provided with a flexible covering layer.

4. The coating oven device according to claim 1, characterized in that: The first fan further includes: Motor; a magnetic wheel connected to the motor; a rotating shaft, one end of which is connected to the magnetic wheel and the other end of which is disposed in the flow channel; Wherein, the impeller is installed on the rotating shaft.

5. The coating oven device according to claim 4, characterized in that: The motor is arranged outside the box body, and 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.

6. The coating oven device according to claim 4, characterized in that: The outer cover of the rotating shaft section of the rotating shaft located between the magnetic wheel and the shell is provided with a rotating shaft protection tube; the rotating shaft protection tube is provided on the outer side of the magnetic wheel at one end thereof close to the motor.

7. The coating oven device according to claim 1, characterized in that: The first fan further includes: Motor; a rotating shaft, one end of which is connected to the motor and the other end of which is disposed in the flow channel; Wherein, the impeller includes a plurality of impeller segments; the plurality of impeller segments are installed on the rotating shaft along the axis of the rotating shaft.

8. The coating oven device according to claim 1, characterized in that: The distance between the inner surface of the flow channel and the impeller is 2.5-4 mm.

9. The coating oven device according to any one of claims 1 to 8, characterized in that: The box body has a pole piece inlet and a pole piece outlet opposite to each other along the first direction; the air inlet is close to one end of the pole piece outlet, and the air outlet is close to one end of the pole piece inlet.

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 path 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 support 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; multiple first fans correspond one-to-one to multiple support rollers and are aligned in the second direction; each first fan is corresponding to two infrared components, and the two infrared components are arranged at intervals on both sides of the first fan along the first direction.

11. A battery production system, characterized in that: include: A pole piece coating device, used to coat the slurry on the current collector to form a pole piece; The coating oven device according to any one of claims 1 to 10 is used to dry the electrode.

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