Coating and drying device and battery production system

Abstract

The invention discloses a coating and drying device and a battery production system. The coating drying device comprises a first drying oven, a second drying oven and a third drying oven, the first drying oven comprises a first preheating drying section, a first main drying section and a first secondary drying section, and the first main drying section is located between the first preheating drying section and the first secondary drying section; the pipeline assembly comprises a first air inlet pipe, a first exhaust pipe and a first connecting pipe, the first preheating drying section, the first main drying section and the first secondary drying section communicate with the first exhaust pipe and the first air inlet pipe correspondingly, and at least one of the first preheating drying section and the first secondary drying section communicates with the first main drying section through the first connecting pipe; the first connecting pipe is used for guiding exhaust air of at least one of the first preheating drying section and the first secondary drying section into the first main drying section. According to the coating drying device, high-temperature low-humidity air exhausted by the first drying oven is guided into the first main drying section through the first connecting pipe, recycling of the air is achieved, the amount of introduced fresh air needing to be heated and dehumidified is reduced, and therefore the energy consumption of the coating drying device is reduced.

Description

Technical Field

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

[0002] In the process of manufacturing the electrode sheet, it is necessary to coat the surface of the current collector to form the electrode sheet, and then transport the electrode sheet to the coating and drying equipment for drying. The current problem is that the wind consumption of the drying equipment is large and the wind utilization rate is low. Summary of the invention

[0003] In view of the above problems, the present application provides a coating and drying device and a battery production system, which can improve the problem of high wind consumption of the coating and drying equipment.

[0004] In a first aspect, the present application provides a coating and drying device, comprising:

[0005] A first drying oven is formed with a first drying channel, wherein the first drying channel is formed with a first preheating drying section, a first main drying section and a first drying section which are arranged in sequence;

[0006] The pipeline assembly is arranged outside the first drying channel, and includes a first air inlet duct, a first exhaust duct and a first connecting pipe. The first preheating and drying section, the first main drying section and the first drying section are respectively connected to the first exhaust duct and the first air inlet duct. At least one of the first preheating and drying section and the first drying section is connected to the first main drying section through the first connecting pipe. The first connecting pipe is used to introduce the exhaust air of at least one of the first preheating and drying section and the first drying section into the first main drying section.

[0007] During the drying process, the electrode piece is fed into the first preheating and drying section of the first oven and is fed out of the first drying section, that is, the first preheating and drying section is the head of the first oven, and the first drying section is the tail of the first oven. During the drying process of the electrode piece, since the electrode piece does not fully absorb heat at the head of the first oven, the solvent evaporation amount of the electrode piece is very small at the tail of the oven, and the drying process is basically completed. Therefore, the wind humidity at the head and tail of the first oven is lower than the humidity of the first main drying section, and the humidity at the head of the first oven is greater than the humidity at the tail. At least one of the first preheating and drying section and the first drying section is connected to the first main drying section through the first connecting pipe, and the high-temperature and low-humidity wind at the head and tail is introduced into the first main drying section for reuse, so that the wind can be recycled across the drying area, and the recycling rate of the wind is improved. Compared with the structure in which the first main drying section only introduces fresh air from the outside, the return air that needs to be condensed, dehumidified and heated can be reduced, and the recycling of heated and dehumidified wind can be realized, thereby reducing the energy consumption of the coating drying equipment.

[0008] In some embodiments, the first preheating and drying section is connected to the first main drying section through a first connecting pipe. The humidity of the first preheating and drying section is lower than that of the first drying section. The first preheating and drying section is connected to the first main drying section through the first connecting pipe. Compared with the method of passing the exhaust air of the first drying section into the first main drying section, relatively dry high-temperature and low-humidity air can be passed into the first main drying section to further reduce the amount of air that needs to be condensed and dehumidified, so as to further reduce the energy consumption of the coating and drying equipment.

[0009] In some embodiments, the pipeline assembly further includes a first valve disposed on the first connecting pipe, and the first valve is used to open or close the first connecting pipe. Different specifications and types of pole pieces have different evaporation amounts of solvent in the coating and drying device, and the humidity of the air discharged in different drying sections is also different. Therefore, it is possible to determine whether the first valve is opened or closed according to different specifications and types of pole pieces, so as to facilitate the adjustment of the air intake of the first main drying section.

[0010] In some embodiments, the pipeline assembly includes a second connecting pipe, a second air inlet pipe and a second exhaust pipe, the coating and drying device also includes a second oven, the second air inlet pipe and the second exhaust pipe are respectively connected to the second oven, at least one of the first preheating and drying section and the first drying section is connected to the second oven through the second connecting pipe, and the second connecting pipe is used to introduce the exhaust air of at least one of the first preheating and drying section and the first drying section into the second oven.

[0011] After one side of the electrode plate is dried in the first oven of the coating and drying device, the other side of the coated electrode plate needs to be dried and the electrode plate is transported to the second oven. The second oven blows air to the other side of the electrode plate to dry the electrode plate. Through the setting of the second connecting pipe, the high-temperature and low-humidity air of at least one of the first preheating and drying section and the first drying section in the first oven can be introduced into the second oven. Compared with the structure in which the second oven only introduces fresh air from the outside, the amount of fresh air introduced into the second oven can be reduced, thereby reducing the amount of condensed and heated fresh air, realizing multiple recycling of the condensed, dehumidified and heated fresh air, so as to further improve the recycling rate of the air, thereby reducing the energy consumption of the coating and drying device.

[0012] In some embodiments, the first drying section is connected to the second oven through a second connecting pipe, so that the high-temperature low-pressure air in the first oven can be discharged into the second oven to reduce the introduction of fresh air into the second oven, thereby reducing the amount of fresh air condensed and heated in the second oven, improving the recycling rate of air, and reducing the energy consumption of the coating and drying device.

[0013] In some embodiments, the second oven is formed with a second drying channel, and the second drying channel is formed with a second preheating and drying section, a second main drying section and a second drying section arranged in sequence, the second preheating and drying section, the second main drying section and the second drying section are respectively connected to the second air inlet duct and the second exhaust duct, and at least one of the first preheating and drying section and the first drying section is connected to the second preheating and drying section through a second connecting pipe, and the second connecting pipe is used to introduce the exhaust air of at least one of the first preheating and drying section and the first drying section into the second preheating and drying section. The exhaust air of the three drying sections of the second oven is substantially the same as the exhaust process of the three drying sections in the above-mentioned first oven, that is, the exhaust air of the second preheating drying section and the second drying section is high-temperature and low-humidity air, and the exhaust air of the second main drying section is high-temperature and high-humidity air. The second connecting pipe can use the high-temperature and low-humidity air exhausted from at least one of the second preheating drying section and the second drying section as the intake air of the second main drying section. Compared with the structure in which the second oven only introduces fresh air from the outside, the amount of fresh air introduced into the second oven can be further reduced, thereby reducing the amount of fresh air condensed and heated, and improving the circulation utilization rate of the air, so as to reduce the energy consumption of the coating and drying device.

[0014] In some embodiments, the first drying section is connected to the second preheating drying section through a second connecting pipe. Thus, the high-temperature and low-humidity air discharged from the first oven can be introduced into the second preheating drying section of the second oven. When the electrode piece is dried in the second oven, the second preheating drying section can preheat the electrode piece, thereby reducing the amount of fresh air introduced into the second preheating drying section, thereby reducing the energy consumption of the coating and drying device, and further improving the recycling rate of the air.

[0015] In some embodiments, the pipeline assembly also includes a second valve disposed on the second connecting pipe, and the second valve is used to open or close the second connecting pipe. When only one side of the electrode is dried, the first oven can complete the drying of the electrode, and the second oven does not need to work. At this time, the second valve is in a closed state, which can save the air volume of the first oven. When it is necessary to dry one side of the electrode and then dry the other side of the electrode, or to dry both sides of the electrode at the same time, the second oven works. At this time, the second valve is opened to introduce the high-temperature and low-humidity air generated by the drying process of the first oven into the second oven. Therefore, the setting of the second valve can realize the switching of different drying modes of the first oven and the second oven according to actual needs, so as to facilitate the timely adjustment of the air volume in the first oven and the air volume in the second oven.

[0016] In some embodiments, the pipeline assembly further includes a third connecting pipe, and at least one of the second preheating and drying section and the second drying section is connected to the second main drying section through the third connecting pipe, and the third connecting pipe is used to introduce the exhaust air of at least one of the second preheating and drying section and the second drying section into the second main drying section. The second air inlet pipe and the second air exhaust pipe can supply and exhaust air to the second preheating and drying section, the second main drying section and the second drying section, and the third connecting pipe can send the high-temperature and low-humidity air of at least one of the second preheating and drying section and the second drying section into the first main drying section, so as to further reduce the amount of new air introduced into the first main drying section, thereby improving the circulation utilization rate of the air, so as to reduce the energy consumption of the coating and drying device.

[0017] In some embodiments, the second preheating drying section is connected to the second main drying section through a third connecting pipe. Thus, compared with the structure in which the second drying section is connected to the second main drying section through the third connecting pipe, high-temperature air with lower humidity can be introduced into the first main drying section, reducing the amount of fresh air introduced into the second main drying section, thereby reducing the energy consumption of the coating drying device.

[0018] In some embodiments, the pipeline assembly further includes a third valve disposed on the third connecting pipe, and the third valve is used to open or close the third connecting pipe. Different specifications and types of pole pieces have different evaporation amounts of solvent in the coating and drying device, and the humidity of the wind discharged in different drying sections is also different. Therefore, it is possible to determine whether the third valve is opened or closed according to different specifications and types of pole pieces, so as to facilitate the adjustment of the air intake of the second main drying section.

[0019] In some embodiments, the pipeline assembly further includes a fourth connecting pipe, through which at least one of the second drying section and the second preheating drying section is connected to the first preheating drying section, and the fourth connecting pipe is used to guide the exhaust air of at least one of the second drying section and the second preheating drying section into the first preheating drying section. Thus, the high-temperature and low-humidity air in the second oven can be used as the inlet air of the first oven, thereby realizing the mutual recycling of the fresh air of the first oven and the second oven.

[0020] In some embodiments, the pipeline assembly further includes a fourth valve disposed on the fourth connecting pipe, and the fourth valve is used to open or close the fourth connecting pipe. It can be determined whether to open the fourth valve according to the operating state and usability requirements of the first oven and the second oven to facilitate the adjustment of the air volume of the first oven and the second oven.

[0021] In some embodiments, the pipeline assembly further includes a first opening and closing valve, which is disposed on the second air inlet pipe. The first opening and closing valve divides the second air inlet pipe into a first air inlet portion and a second air inlet portion. The first air inlet portion is connected to the second preheating and drying section, and the second main drying section and the second drying section are respectively connected to the second air inlet portion. At least one of the second preheating and drying section and the second drying section is connected to the second air inlet portion through a third connecting pipe. Different types and specifications of electrodes have different requirements. For some electrodes, the humidity and temperature of the air sent to the first preheating and drying section and the air sent to the first main drying section are different during the drying process. For some electrodes, the humidity and temperature of the air sent to the first preheating and drying section and the air sent to the first main drying section are the same during the drying process. Therefore, the opening and closing of the first opening and closing valve can be adjusted according to the type of electrode to meet the drying requirements of different types of electrode to improve the application range of the coating and drying device.

[0022] In some embodiments, at least one of the first preheating drying section and the first drying section is connected to the first air inlet portion through the second connecting pipe, thereby allowing high-temperature and low-humidity air to flow into the first main drying section, thereby realizing air recycling.

[0023] In some embodiments, the pipeline assembly further includes a second opening and closing valve and a third opening and closing valve, which are arranged at intervals in the second exhaust duct and divide the second exhaust duct into a first exhaust part, a second exhaust part and a third exhaust part, and the first exhaust part, the second exhaust part and the third exhaust part are connected to the second preheating and drying section, the second main drying section and the second drying section in a one-to-one correspondence, and at least one of the first exhaust part and the third exhaust part is connected to the second air inlet part through a third connecting pipe. The arrangement of the second opening and closing valve and the third opening and closing valve can make the first preheating and drying section, the first main drying section and the first drying section be exhausted separately, and reduce the probability of the high temperature and high humidity exhaust of the first main drying section being mixed into the exhaust of the first preheating and drying section and the exhaust of the first drying section, so as to improve the utilization rate of the exhaust of the first preheating and drying section and the first drying section.

[0024] In some embodiments, the second oven is located at one side of the bottom of the first oven. Thus, the floor space of the coating and drying device can be reduced.

[0025] In some embodiments, along the length direction of the first oven, the second drying section and the first preheating drying section are located on the same side of the first main drying section, and the second preheating drying section and the first drying section are located on the same side of the first main drying section. This facilitates the pipe connection between the first drying section and the second preheating drying section, and the pipe connection between the second exhaust duct and the first air inlet duct.

[0026] In some embodiments, the pipeline assembly further includes a fourth opening and closing valve disposed on the first air inlet pipe, the fourth opening and closing valve divides the first air inlet pipe into a first air inlet section and a second air inlet section, the first air inlet section is connected to the first preheating and drying section, the first main drying section and the first drying section are respectively connected to the second air inlet section, and at least one of the first preheating and drying section and the first drying section is connected to the second air inlet section through the first connecting pipe. Different types and specifications of electrodes have different requirements. For some electrodes, during the drying process, the humidity and temperature of the air sent to the first preheating and drying section and the air sent to the first main drying section are different. For some electrodes, during the drying process, the humidity and temperature of the air sent to the second preheating and drying section and the air sent to the second main drying section are the same. Therefore, the opening and closing of the fourth opening and closing valve can be adjusted according to the type of electrode to meet the drying requirements of different types of electrode to improve the application range of the coating and drying device.

[0027] In some embodiments, the pipeline assembly further includes a fifth opening and closing valve and a sixth opening and closing valve, which are arranged at intervals in the first exhaust duct and divide the first exhaust duct into a first exhaust section, a second exhaust section and a third exhaust section, and the first exhaust section, the second exhaust section and the third exhaust section are connected to the first preheating and drying section, the first main drying section and the first drying section in a one-to-one correspondence, and at least one of the first exhaust section and the third exhaust section is connected to the second air inlet section through the first connecting pipe. The arrangement of the fifth opening and closing valve and the sixth opening and closing valve can make the second preheating and drying section, the second main drying section and the second drying section be exhausted separately, and reduce the probability of the high temperature and high humidity exhaust of the first main drying section being mixed into the exhaust of the first preheating and drying section and the exhaust of the first drying section, so as to improve the utilization rate of the exhaust of the first preheating and drying section and the first drying section.

[0028] In a second aspect, the present application provides a battery production system, comprising the coating and drying device of the first aspect, the coating and drying device being used for drying the pole pieces of the battery.

[0029] Since the battery production system includes all the technical features of the above-mentioned coating and drying device, the effects are the same as those described above and will not be repeated here.

[0030] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Moreover, the same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0032] Figure 1 An axonometric diagram of a coating and drying device according to some embodiments of the present application;

[0033] Figure 2 A top view of a coating and drying device according to some embodiments of the present application;

[0034] Figure 3 for Figure 1 A side view from the B direction;

[0035] Figure 4 for Figure 3 C-direction view.

[0036] The reference numerals in the specific implementation manner are as follows:

[0037] 100, first drying oven; 110, first preheating and drying section; 120, first main drying section; 130, first drying section; 140, drying unit;

[0038] 200, second drying oven; 210, second preheating and drying section; 220, second main drying section; 230, second drying section;

[0039] 300, pipeline assembly; 310, first air inlet pipe; 311, fourth opening and closing valve; 312, first air inlet section; 313, second air inlet section; 320, first air exhaust pipe; 321, fifth opening and closing valve; 322, sixth opening and closing valve; 323, first air exhaust section; 324, second air exhaust section; 325, third air exhaust section; 330, first connecting pipe; 331, first valve; 350, second connecting pipe; 351, second valve door; 360, third connecting pipe; 361, third valve; 370, second air inlet pipe; 371, first opening and closing valve; 372, first air inlet part; 373, second air inlet part; 380, second air exhaust pipe; 381, second opening and closing valve; 382, ​​third opening and closing valve; 383, first exhaust part; 384, second exhaust part; 385, third exhaust part; 390, fourth connecting pipe; 391, fourth valve. DETAILED DESCRIPTION

[0040] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0041] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0042] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0043] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0044] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0045] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0046] 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 orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0047] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0048] In the process of manufacturing the electrode, it is necessary to coat the surface of the current collector to form the electrode, and then transport the electrode to the coating and drying equipment for drying. The current problem is that the wind consumption of the drying equipment is large and the utilization rate of the wind is low. Specifically, during the drying process of the electrode, fresh air is introduced from the outside, and the fresh air is condensed, dehumidified and heated to form high-temperature and low-humidity wind, and the high-temperature and low-humidity wind is sent to the drying equipment. The solvent evaporates during the coating of the electrode in the drying equipment, and the wind generated in the oven is directly discharged from the drying equipment. In this way, the utilization rate of the fresh air of the drying equipment is low, and it is discharged after only one use, which increases the energy consumption of the drying equipment.

[0049] In view of this, the present application provides a coating and drying device. During the drying process, the electrode piece is fed into the first preheating and drying section of the first oven and is fed out of the first drying section, that is, the first preheating and drying section is the head of the first oven, and the first drying section is the tail of the first oven. During the drying process of the electrode piece, since the electrode piece does not fully absorb heat at the head of the first oven, the solvent evaporation amount of the electrode piece at the tail is very small, and the drying process is basically completed. Therefore, the wind humidity at the head and tail of the first oven is lower than the humidity of the first main drying section, and the humidity at the head of the first oven is greater than the humidity at the tail. At least one of the first preheating and drying section and the first drying section is connected to the first main drying section through a first connecting pipe, and the high-temperature and low-humidity wind at the head and tail is introduced into the first main drying section for reuse, so that the wind can be recycled across the drying area, and the recycling rate of the wind is improved. Compared with the structure in which the first main drying section only introduces fresh air from the outside, the return air that needs to be condensed, dehumidified and heated can be reduced, and the recycling of heated and dehumidified wind can be achieved, thereby reducing the energy consumption of the coating and drying equipment.

[0050] The coating and drying device provided in the present application can be used for coating and drying of battery electrodes, and can also be used for drying materials that need to be coated in other fields, such as coating and drying of various roll substrates such as paper, cloth and leather.

[0051] For the convenience of explanation, please refer to the following examples. Figure 1-Figure 4 , a coating and drying device in some embodiments of the present application is taken as an example for explanation.

[0052] The coating and drying device includes a first oven 100 and a pipeline assembly 300. The first oven 100 is formed with a first drying channel, and the first drying channel is formed with a first preheating and drying section 110, a first main drying section 120 and a first drying section 130 arranged in sequence. The pipeline assembly 300 includes a first air inlet pipe 310, a first air exhaust pipe 320 and a first connecting pipe 330. The first preheating and drying section 110, the first main drying section 120 and the first drying section 130 are connected to the first exhaust pipe 320 and the first air inlet pipe 310 respectively. At least one of the first preheating and drying section 110 and the first drying section 130 is connected to the first main drying section 120 through the first connecting pipe 330. The first connecting pipe 330 is used to introduce the exhaust air of at least one of the first preheating and drying section 110 and the first drying section 130 into the first main drying section 120.

[0053] Optionally, the first preheating and drying section 110, the first main drying section 120 and the first drying section 130 respectively include one or more oven units connected in series, and the number of the oven units can be specifically set according to actual needs.

[0054] Figure 4 The first preheating and drying section 110, the first main drying section 120, and the secondary drying unit 140 shown in the figure are respectively formed by a plurality of drying oven units connected in series.

[0055] Optionally, the first connecting pipe 330 can be connected to the first exhaust duct 320 and the first air inlet duct 310 to realize that at least one of the first preheating and drying section 110 and the first drying section 130 is connected to the first main drying section 120 through the first connecting pipe 330 (the following embodiments will be shown as an example), and the first connecting pipe 330 can also be separately connected to at least one of the first preheating and drying section 110 and the first drying section 130 and the first main drying section 120.

[0056] The first connecting pipe 330 is used to introduce the exhaust air of at least one of the first preheating and drying section 110 and the first drying section 130 into the first main drying section 120, which means that the exhaust air of the first preheating and drying section 110 and / or the first drying section 130 connected to the first connecting pipe 330 is introduced into the first main drying section 120.

[0057] At least one of the first preheating and drying section 110 and the first drying section 130 is connected to the first main drying section 120 through the first connecting pipe 330. The first connecting pipe 330 is used to introduce the exhaust air of at least one of the first preheating and drying section 110 and the first drying section 130 into the first main drying section 120, including but not limited to the following methods:

[0058] In the first mode, the oven unit of the first preheating and drying section 110 is provided with an exhaust port, the drying unit 140 of the first main drying section 120 is provided with an air inlet, and the exhaust port is connected to the air inlet through the first connecting pipe 330.

[0059] In the second mode, the drying unit 140 of the first main drying section 120 is provided with an air inlet, and the first preheating drying section 110 and the first drying section 130 are both provided with an air exhaust port, and the air exhaust ports of the two are connected to the air inlet through the first connecting pipe 330 .

[0060] In a third embodiment, the first drying section 130 is provided with an exhaust port, the first main drying section 120 is provided with an air inlet, and the exhaust port is connected to the air inlet through the first connecting pipe 330 .

[0061] Optionally, a conveying roller (not shown in the figure) is provided in the first oven 100, and the conveying roller is used to convey the electrode sheet.

[0062] Optionally, the first preheating and drying section 110, the first main drying section 120 and the first drying section 130 may be supplied with high-temperature and low-humidity wind, the air temperatures of the three air intakes may be substantially the same, the air humidity of the three air intakes may be substantially the same, the air speeds of the three air intakes may be different or not completely the same, the air speed of the first main drying section 120 may be greater than the first preheating and drying section 110 and the first drying section 130, and the air speed of the first preheating and drying section 110 may be less than or equal to the air speed of the first drying section 130. The specific process parameters may be determined according to the type and properties of the dried object.

[0063] Optionally, a fan may be provided in the first connecting pipe 330 , and exhaust air of at least one of the first preheating and drying section 110 and the first drying section 130 may be introduced into the first main drying section 120 through the fan.

[0064] Optionally, the length of the first main drying section 120 is greater than the length of the first preheating drying section 110 and the length of the first drying section 130 .

[0065] During the process of conveying and drying the electrode, the drying process of the electrode is divided into three stages according to the drying rate of the electrode, namely, the preheating stage, the main drying stage and the secondary drying stage. The preheating stage mainly heats the electrode, that is, the process of heating the solvent in the electrode to the boiling point. In this process, the amount of solvent evaporation is small. In the main drying stage, the solvent in the electrode reaches the boiling point and the evaporation amount is large. In order to accelerate the drying process, a large amount of solvent in the electrode is evaporated. Therefore, only a small amount of solvent is evaporated in the secondary drying stage. During the conveying process of the electrode, the first air inlet pipe 310 sends high-temperature and low-humidity air to the electrode. According to the drying characteristics of the electrode, the first oven 100 is set to three drying sections. Among them, the first preheating and drying section 110 corresponds to the preheating stage, the main drying stage corresponds to the first main drying section 120, and the secondary drying stage corresponds to the first drying section 130. At least one of the first preheating and drying section 110 and the first drying section 130 is connected to the first main drying section 120 through the first connecting pipe 330. The first preheating and drying section 110 mainly plays a role in preheating and heating the electrode piece, and the first main drying section 120 plays a main role in drying the electrode piece. The electrode piece with low humidity enters the first drying section 130 and is dried again. Therefore, the humidity of the first preheating and drying section 110 and the first drying section 130 is lower than that of the first main drying section 120. At least one of the first preheating and drying section 110 and the first drying section 130 is connected to the first main drying section 120 through the first connecting pipe 330, and the high-temperature and low-humidity wind of the first preheating and drying section 110 and the first drying section 130 can be introduced into the first main drying section 120, so that the wind can be recycled across the drying area, thereby improving the recycling rate of the wind. Compared with the structure in which the first main drying section 120 only introduces fresh air from the outside, the return air that needs to be condensed, dehumidified and heated can be reduced, and the recycling of heated and dehumidified air can be realized, thereby reducing the energy consumption of the coating drying equipment.

[0066] In some embodiments, please refer to Figure 1-Figure 4 , the first preheating and drying section 110 is connected to the first main drying section 120 through the first connecting pipe 330. The first preheating and drying section 110 is the head of the first oven 100, and the first drying section 130 is the tail of the first oven 100. The first preheating and drying section 110 heats the electrode from room temperature, and the solvent of the electrode is in an endothermic state, which is a process of being heated from room temperature to the critical temperature of liquid-gas transition, and the first drying section 130 needs to continue drying the electrode when heating the electrode. Therefore, the humidity of the first preheating and drying section 110 is lower than that of the first drying section 130. The first preheating and drying section 110 is connected to the first main drying section 120 through the first connecting pipe 330. Compared with the method of passing the exhaust air of the first drying section 130 into the first main drying section 120, relatively dry high-temperature and low-humidity wind can be passed into the first main drying section 120 to further reduce the amount of air that needs to be condensed and dehumidified, so as to further reduce the energy consumption of the coating and drying equipment.

[0067] In some embodiments, please refer to Figure 2 The pipeline assembly 300 also includes a first valve 331 disposed on the first connecting pipe 330 , and the first valve 331 is used to open or close the first connecting pipe 330 .

[0068] Figure 2 The direction of the arrow on the first connecting pipe 330 is the flow direction of the wind in the first connecting pipe 330 when the first valve 331 is in the open state.

[0069] Different specifications and types of electrodes have different evaporation amounts of solvent in the coating and drying device, and different humidities of air discharged from different drying sections. Therefore, it is possible to determine whether the first valve 331 is open or closed according to different specifications and types of electrodes, so as to facilitate the adjustment of the air intake of the first main drying section 120.

[0070] In some embodiments, please refer to Figure 1-Figure 4 The pipeline assembly 300 includes a second connecting pipe 350, a second air inlet pipe and a second exhaust pipe. The coating and drying device also includes a second oven 200. The second air inlet pipe 370 and the second exhaust pipe 380 are respectively connected to the second oven 200. At least one of the first preheating and drying section 110 and the first drying section 130 is connected to the second oven 200 through the second connecting pipe 350. The second connecting pipe 350 is used to introduce the exhaust air of at least one of the first preheating and drying section 110 and the first drying section 130 into the second oven 200.

[0071] The second connecting pipe 350 is used to introduce the exhaust air of at least one of the first preheating and drying section 110 and the first drying section 130 into the second oven 200, which means that the exhaust air of the first preheating and drying section 110 and / or the first drying section 130 connected to the second connecting pipe 350 is introduced into the second oven 200.

[0072] Optionally, the second connecting pipe 350 is provided with a fan, and the exhaust air of at least one of the first preheating and drying section 110 and the first drying section 130 can be transported to the second drying oven 200 through the fan.

[0073] Please refer to Figure 4 , Figure 4The E direction is the conveying direction of the electrode piece in the first oven 100, and the F direction is the conveying direction of the electrode piece in the second oven 200. After one side of the electrode piece is dried in the first oven 100 of the coating and drying device, the other side of the coated electrode piece needs to be dried, and the electrode piece is conveyed to the second oven 200, and the second oven 200 blows air to the other side of the electrode piece to dry the electrode piece. Through the arrangement of the second connecting pipe 350, the high-temperature and low-humidity wind of at least one of the first preheating and drying section 110 and the first drying section 130 in the first oven 100 can be introduced into the second oven 200. Compared with the structure in which the second oven 200 only introduces fresh air from the outside, the amount of fresh air introduced into the second oven 200 can be reduced, thereby reducing the amount of condensed and heated fresh air, realizing multiple recycling of condensed, dehumidified and heated fresh air, so as to further improve the recycling rate of wind, thereby reducing the energy consumption of the coating and drying device.

[0074] In some embodiments, please refer to Figure 2 and Figure 3 The first drying section 130 is connected to the second oven 200 through the second connecting pipe 350 .

[0075] The first drying section 130 is connected to the second oven 200 through the second connecting pipe 350 , which includes the first drying section 130 being connected to any one or more of the head, tail and middle parts of the second oven 200 .

[0076] Thus, the high-temperature and low-wind in the first oven 100 can be discharged into the second oven 200 to reduce the introduction of new air into the second oven 200, thereby reducing the amount of new air condensed and heated in the second oven 200, improving the recycling rate of the wind, and reducing the energy consumption of the coating and drying device.

[0077] In some embodiments, please refer to Figure 1-Figure 4 The second drying oven 200 is formed with a second drying channel, and the second drying channel is formed with a second preheating and drying section 210, a second main drying section 220 and a second drying section 230 arranged in sequence. The second preheating and drying section 210, the second main drying section 220 and the second drying section 230 are respectively connected to the second air inlet duct 370 and the second air exhaust duct 380. At least one of the first preheating and drying section 110 and the first drying section 130 is connected to the second preheating and drying section 210 through the second connecting pipe 350. The second connecting pipe 350 is used to introduce the exhaust air of at least one of the first preheating and drying section 110 and the first drying section 130 into the second preheating and drying section 210.

[0078] Optionally, the second preheating and drying section 210, the second main drying section 220 and the secondary drying section 230 respectively include one or more oven units connected in series. The number of oven units can be specifically set according to actual needs and is not specifically limited here.

[0079] Figure 4 It is exemplarily shown in the figure that the second preheating drying section 210, the second main drying section 220, and the secondary drying section 230 are respectively formed by a plurality of drying oven units connected in series.

[0080] At least one of the first preheating and drying section 110 and the first drying section 130 is connected to the second preheating and drying section 210 via the second connecting pipe 350 , which means that the exhaust air of the first preheating and drying section 110 and / or the first drying section 130 connected to the second connecting pipe 350 is introduced into the second preheating and drying section 210 .

[0081] The exhaust air of the three drying sections of the second oven 200 is substantially the same as the exhaust process of the three drying sections in the first oven 100, that is, the exhaust air of the second preheating drying section 210 and the second drying section 230 is high-temperature and low-humidity air, and the exhaust air of the second main drying section 220 is high-temperature and high-humidity air. The second connecting pipe 350 can use the high-temperature and low-humidity air exhausted from at least one of the second preheating drying section 210 and the second drying section 230 as the intake air of the second main drying section 220. Compared with the structure in which the second oven 200 only introduces fresh air from the outside, the amount of fresh air introduced into the second oven 200 can be further reduced, thereby reducing the amount of fresh air that is condensed and heated, and improving the recycling rate of the air, so as to reduce the energy consumption of the coating and drying device.

[0082] In some embodiments, please refer to Figure 1-Figure 4 The first drying section 130 is connected to the second preheating and drying section 210 through the second connecting pipe 350 .

[0083] Optionally, the first drying section 130 can be directly connected to the second preheating drying section 210 through the second connecting pipe 350. A separate exhaust duct can also be provided in the first drying section 130, and a separate air inlet duct can be provided in the second preheating drying section 210, and the exhaust duct is connected to the air inlet duct through the second connecting pipe 350.

[0084] Thus, the high-temperature and low-humidity air exhausted from the first oven 100 can be introduced into the second preheating and drying section 210 of the second oven 200. When the electrode is dried in the second oven 200, the second preheating and drying section 210 can preheat the electrode, thereby reducing the amount of new air introduced into the second preheating and drying section 210, so as to reduce the energy consumption of the coating and drying device and further improve the recycling rate of the air.

[0085] In some embodiments, please refer to Figure 2 The pipeline assembly 300 also includes a second valve 351 disposed on the second connecting pipe 350 , and the second valve 351 is used to open or close the second connecting pipe 350 .

[0086] Figure 2The direction of the arrow on the second connecting pipe 350 is the flow direction of the wind in the second connecting pipe 350 when the second valve 351 is in the open state.

[0087] When only one side of the electrode is dried, the first oven 100 can complete the drying of the electrode, and the second oven 200 does not need to work. At this time, the second valve 351 is in a closed state, which can save the air volume of the first oven 100. When it is necessary to dry one side of the electrode and then dry the other side of the electrode, or to dry both sides of the electrode at the same time, the second oven 200 works. At this time, the second valve 351 is opened to introduce the high-temperature and low-humidity wind generated by the drying process of the first oven 100 into the second oven 200. Therefore, the setting of the second valve 351 can realize the switching of different drying modes of the first oven 100 and the second oven 200 according to actual needs, so as to facilitate the timely adjustment of the air volume in the first oven 100 and the air volume in the second oven 200.

[0088] In some embodiments, please refer to Figure 1-Figure 4 The pipeline assembly 300 also includes a third connecting pipe 360, a second air inlet pipe 370 and a second air exhaust pipe 380. The second preheating and drying section 210, the second main drying section 220 and the second drying section 230 are respectively connected to the second air inlet pipe 370 and the second air exhaust pipe 380. At least one of the second preheating and drying section 210 and the second drying section 230 is connected to the second main drying section 220 through the third connecting pipe 360. The third connecting pipe 360 ​​is used to introduce the exhaust air of at least one of the second preheating and drying section 210 and the second drying section 230 into the second main drying section 220.

[0089] Optionally, the third connecting pipe 360 ​​can be directly connected to at least one of the second preheating and drying section 210 and the second drying section 230 and the second main drying section 220. Optionally, the third connecting pipe 360 ​​is provided with a fan, and the exhaust air of at least one of the second preheating and drying section 210 and the second drying section 230 can be introduced into the second main drying section 220 through the fan.

[0090] The second air inlet duct 370 and the second air exhaust duct 380 can supply and exhaust air to the second preheating and drying section 210, the second main drying section 220 and the second drying section 230. The third connecting pipe 360 ​​can deliver high-temperature and low-humidity air from at least one of the second preheating and drying section 210 and the second drying section 230 into the first main drying section 120 to further reduce the amount of fresh air introduced into the first main drying section 120, thereby improving the circulation utilization rate of the air and reducing the energy consumption of the coating and drying device.

[0091] In some embodiments, please refer to Figure 1-Figure 4 The second preheating and drying section 210 is connected to the second main drying section 220 through the third connecting pipe 360 ​​.

[0092] Optionally, the second preheating and drying section 210 is provided with a separate exhaust duct, and the second main drying section 220 is provided with a separate air inlet duct, and the exhaust duct is connected to the air inlet duct through the third connecting pipe 360. The third connecting pipe 360 ​​can also be directly connected to the second preheating and drying section 210 and the second main drying section 220.

[0093] Therefore, compared with the structure in which the second drying section 230 is connected to the second main drying section 220 through the third connecting pipe 360, high-temperature air with lower humidity can be introduced into the first main drying section 120, reducing the amount of fresh air introduced into the second main drying section 220, thereby reducing the energy consumption of the coating and drying device.

[0094] In some embodiments, please refer to Figure 2 The pipeline assembly 300 also includes a third valve 361 disposed on the third connecting pipe 360 ​​.

[0095] Figure 2 The arrow direction on the third connecting pipe 360 ​​indicates the flow direction of the wind in the third connecting pipe 360 ​​when the third valve 361 is in the open state.

[0096] Different specifications and types of pole pieces have different evaporation amounts of solvent in the coating and drying device, and the humidity of the air discharged in different drying sections is also different. Therefore, it is possible to determine whether the third valve 361 is open or closed according to different specifications and types of pole pieces, so as to facilitate the adjustment of the air intake of the second main drying section 220.

[0097] In some embodiments, please refer to Figure 1-Figure 4 The pipeline assembly 300 also includes a fourth connecting pipe 390, through which at least one of the second drying section 230 and the second preheating drying section 210 is connected to the first preheating drying section 110, and the fourth connecting pipe 390 is used to introduce the exhaust air of at least one of the second drying section 230 and the second preheating drying section 210 into the first preheating drying section 110.

[0098] Thus, the high-temperature and low-humidity wind in the second oven 200 can be used as the inlet air of the first oven 100, thereby realizing the mutual recycling of the fresh air of the first oven 100 and the second oven 200.

[0099] In some embodiments, please refer to Figure 2 The pipeline assembly 300 also includes a fourth valve 391 disposed on the fourth connecting pipe 390 , and the fourth valve 391 is used to open or close the fourth connecting pipe 390 .

[0100] Figure 2 The arrow direction on the fourth connecting pipe 390 indicates the flow direction of wind in the fourth connecting pipe 390 when the fourth valve 391 is in the open state.

[0101] Whether to open the fourth valve 391 can be determined according to the operating state of the first oven 100 and the use demand of the second oven 200 to facilitate the adjustment of the air volume of the first oven 100 and the second oven 200.

[0102] In some embodiments, please refer to Figure 2 The pipeline assembly 300 also includes a first opening and closing valve 371, which is arranged on the second air inlet pipe 370. The first opening and closing valve 371 divides the second air inlet pipe 370 into a first air inlet part 372 and a second air inlet part 373. The first air inlet part 372 is connected to the second preheating and drying section 210, and the second main drying section 220 and the second drying section 230 are respectively connected to the second air inlet part 373. At least one of the second preheating and drying section 210 and the second drying section 230 is connected to the second air inlet part 373 through the third connecting pipe 360.

[0103] Optionally, the first air inlet part 372 and the second air inlet part 373 are both provided with a first air inlet port (not shown in the figure), and the pipeline assembly 300 also includes an air supply pipeline (not shown in the figure), and the first air inlet ports of the first air inlet part 372 and the second air inlet part 373 are respectively connected to the air supply pipeline to realize air supply from the supply pipeline to the first air inlet part 372 and the second air inlet part.

[0104] Different types and specifications of electrodes have different requirements. During the drying process, for some electrodes, the humidity and temperature of the air sent to the first preheating and drying section 110 and the air sent to the first main drying section 120 are different. During the drying process, for some electrodes, the humidity and temperature of the air sent to the first preheating and drying section 110 and the air sent to the first main drying section 120 are the same. Therefore, the opening and closing of the first opening and closing valve 371 can be adjusted according to the type of electrode to meet the drying requirements of different types of electrode sheets, so as to improve the applicability of the coating and drying device.

[0105] In some embodiments, please refer to Figure 2-Figure 4 At least one of the first preheating drying section 110 and the first drying section 130 is connected to the first air inlet portion 372 through the second connecting pipe 350. Thus, high-temperature and low-humidity wind can be introduced into the first main drying section 120, thereby realizing the recycling of wind.

[0106] In some embodiments, please refer to Figure 2-Figure 4The pipeline assembly 300 also includes a second opening and closing valve 381 and a third opening and closing valve 382, ​​which are arranged at intervals in the second exhaust duct 380, and divide the second exhaust duct 380 into a first exhaust part 383, a second exhaust part 384 and a third exhaust part 385. The first exhaust part 383, the second exhaust part 384 and the third exhaust part 385 are connected to the second preheating and drying section 210, the second main drying section 220 and the second drying section 230 in a one-to-one correspondence, and at least one of the first exhaust part 383 and the third exhaust part 385 is connected to the second air inlet part 373 through the third connecting pipe 360.

[0107] Optionally, the pipeline assembly 300 also includes a main exhaust pipeline (not shown in the figure), and the first exhaust part 383, the second exhaust part 384 and the third exhaust part 385 are all provided with a first exhaust port (not shown in the figure), and the first exhaust port of each of the three is connected to the main exhaust pipeline.

[0108] The setting of the second on-off valve 381 and the third on-off valve 382 can make the first preheating and drying section 110, the first main drying section 120 and the first drying section 130 exhaust separately, and reduce the probability of the high-temperature and high-humidity exhaust air of the first main drying section 120 mixing into the exhaust air of the first preheating and drying section 110 and the exhaust air of the first drying section 130, so as to improve the utilization rate of the exhaust air of the first preheating and drying section 110 and the first drying section 130.

[0109] In some embodiments, please refer to Figure 3 , the second oven 200 is located at one side of the bottom of the first oven 100. Thus, the floor space of the coating and drying device can be reduced.

[0110] In some embodiments, please refer to Figure 4 Along the length direction of the first oven 100 , the second drying section 230 and the first preheating drying section 110 are located on the same side of the first main drying section 120 , and the second preheating drying section 210 and the first drying section 130 are located on the same side of the first main drying section 120 .

[0111] The length direction of the first oven 100 is Figure 4 The A direction in .

[0112] Thus, the pipeline connection between the first drying section 130 and the second preheating drying section 210 and the pipeline connection between the second exhaust duct 380 and the first air inlet duct 310 can be facilitated.

[0113] In some embodiments, please refer to Figure 2-Figure 4The pipeline assembly 300 also includes a fourth on-off valve 311 arranged on the first air inlet pipe 310, and the fourth on-off valve 311 divides the first air inlet pipe 310 into a first air inlet section 312 and a second air inlet section 313. The first air inlet section 312 is connected to the first preheating and drying section 110, and the first main drying section 120 and the first drying section 130 are respectively connected to the second air inlet section 313. At least one of the first preheating and drying section 110 and the first drying section 130 is connected to the second air inlet section 313 through the first connecting pipe 330.

[0114] Optionally, the first air inlet section 312 and the second air inlet section 313 are both provided with a second air inlet (not shown in the figure), and the second air inlets of the two can be connected to the air supply pipeline of the above embodiment.

[0115] Different types and specifications of electrodes have different requirements. During the drying process, for some electrodes, the humidity and temperature of the air sent to the first preheating and drying section 110 and the air sent to the first main drying section 120 are different. During the drying process, for some electrodes, the humidity and temperature of the air sent to the second preheating and drying section 210 and the air sent to the second main drying section 220 are the same. Therefore, the opening and closing of the fourth opening and closing valve 311 can be adjusted according to the type of electrode to meet the drying requirements of different types of electrode sheets, so as to improve the applicability of the coating and drying device.

[0116] In some embodiments, please refer to Figure 2-Figure 4 The pipeline assembly 300 also includes a fifth opening and closing valve 321 and a sixth opening and closing valve 322. The fifth opening and closing valve 321 and the sixth opening and closing valve 322 are arranged at intervals in the first exhaust duct 320, and the first exhaust duct 320 is divided into a first exhaust section 323, a second exhaust section 324 and a third exhaust section 325. The first exhaust section 323, the second exhaust section 324 and the third exhaust section 325 are connected to the first preheating and drying section 110, the first main drying section 120 and the first drying section 130 in a one-to-one correspondence. At least one of the first exhaust section and the third exhaust section 325 is connected to the second air inlet section 313 through the first connecting pipe 330.

[0117] Optionally, the first exhaust section 323, the second exhaust section 324 and the third exhaust section 325 are all provided with second exhaust ports, and the second exhaust ports of the three can be respectively connected to the main exhaust duct of the above embodiment.

[0118] The setting of the fifth on-off valve 321 and the sixth on-off valve 322 can make the second preheating and drying section 210, the second main drying section 220 and the second drying section 230 exhaust separately, and reduce the probability of the high-temperature and high-humidity exhaust air of the first main drying section 120 mixing into the exhaust air of the first preheating and drying section 110 and the first drying section 130, so as to improve the utilization rate of the exhaust air of the first preheating and drying section 110 and the first drying section 130.

[0119] For the convenience of description, the following embodiments are described by taking a battery production system according to some embodiments of the present application as an example.

[0120] The battery production system includes the coating and drying device of the above embodiment, and the coating and drying device is used to dry the pole pieces of the battery.

[0121] Since the battery production system includes all the technical features of the coating and drying device of the above embodiment, the effects are the same as those described above and will not be described again here.

[0122] In an optional embodiment of a coating and drying device of the present application, please refer to Figure 1-Figure 4 The coating and drying device includes a first oven 100, a second oven 200 and a pipeline assembly 300. The first oven 100 forms a first drying channel, and the first drying channel forms a first preheating and drying section 110, a first main drying section 120 and a first drying section 130 arranged in sequence. The second oven 200 forms a second drying channel, and the second drying channel forms a second preheating and drying section 210, a second main drying section 220 and a second drying section 230 arranged in sequence. The pipeline assembly 300 includes a first connecting pipe 330, a second connecting pipe 350, a third connecting pipe 360, a fourth connecting pipe 390, a first air inlet pipe 310, a first air exhaust pipe 320, a second air inlet pipe 370, a second air exhaust pipe 380, a first valve 331, a second valve 351, a third valve 361, a fourth valve 391, a fifth valve, a sixth valve, a first opening and closing valve 371, a second opening and closing valve 381, a third opening and closing valve 382 and a fourth opening and closing valve 311.

[0123] The first opening and closing valve 371 is arranged on the second air inlet duct 370, and the first opening and closing valve 371 divides the second air inlet duct 370 into a first air inlet part 372 and a second air inlet part 373. The first air inlet part 372 is connected to the second preheating and drying section 210, and the second main drying section 220 and the second drying section 230 are respectively connected to the second air inlet part 373. The second on-off valve 381 and the third on-off valve 382 are arranged at intervals in the second exhaust duct 380, and divide the second exhaust duct 380 into a first exhaust part 383, a second exhaust part 384 and a third exhaust part 385. The first exhaust part 383, the second exhaust part 384 and the third exhaust part 385 are connected to the second preheating and drying section 210, the second main drying section 220 and the second drying section 230 in a one-to-one manner. The first exhaust part 383 is connected to the second air inlet part 373 through the third connecting pipe 360. The third connecting pipe 360 ​​is provided with a third valve 361. The third connecting pipe 360 ​​is used to introduce the exhaust air of the second preheating and drying section 210 into the second main drying section 220.

[0124] The fourth opening and closing valve 311 divides the first air inlet duct 310 into a first air inlet section 312 and a second air inlet section 313. The first air inlet section 312 is connected to the first preheating and drying section 110, and the first main drying section 120 and the first drying section 130 are respectively connected to the second air inlet section 313. The fifth opening and closing valve 321 and the sixth opening and closing valve 322 are arranged at intervals in the first exhaust duct 320, and divide the first exhaust duct 320 into a first exhaust section 323, a second exhaust section 324 and a third exhaust section 325. The first exhaust section 323, the second exhaust section 324 and the third exhaust section 325 are connected to the first preheating and drying section 110, the first main drying section 120 and the first drying section 130 in a one-to-one correspondence.

[0125] The first exhaust section 323 is connected to the second air inlet section 313 through the first connecting pipe 330, and the first connecting pipe 330 is provided with a first valve 331, and the first valve 331 is used to open or close the first connecting pipe 330, and the first connecting pipe 330 is used to introduce the exhaust air of the first preheating and drying section 110 into the first main drying section 120. The third exhaust section 325 is connected to the first air inlet part 372 through the second connecting pipe 350, and the second connecting pipe 350 is provided with a second valve 351, and the second valve 351 is used to open or close the second connecting pipe 350, and the second connecting pipe 350 is used to introduce the exhaust air of the first drying section 130 into the second preheating and drying section 210. The third exhaust part 385 is connected to the first air inlet section 312 through the fourth connecting pipe 390. The fourth connecting pipe 390 is provided with a fourth valve 391. The fourth valve 391 is used to open or close the fourth connecting pipe 390. The fourth connecting pipe 390 is used to introduce the exhaust air of the second drying section 230 into the first preheating drying section 110.

[0126] Please refer to Figure 2When the first valve 331 to the fourth valve 391 are closed and the first on-off valve 371 to the sixth on-off valve 322 are opened, the first air inlet duct 310 supplies air to the three drying sections of the first oven 100, and the air used to dry the electrodes in the three drying sections is discharged from the first exhaust duct 320. The second air inlet duct 370 supplies air to the three drying sections of the second oven 200, and the air in the three drying sections of the second oven 200 is discharged from the second exhaust duct 380. The fresh air introduced in this process is not recycled. When the second valve 351, the fourth valve 391, the third opening and closing valve 382, ​​and the fifth opening and closing valve 321 are opened, and the first valve 331, the third valve 361, the first opening and closing valve 371, the second opening and closing valve 381, the fourth opening and closing valve 311, and the sixth opening and closing valve 322 are closed, the exhaust air of the first drying section 130 of the first oven 100 is introduced into the first preheating and drying section 110 of the second oven 200 through the second connecting pipe 350, and the exhaust air of the first drying section 130 of the second oven 200 is introduced into the first preheating and drying section 110 of the first oven 100 through the fourth connecting pipe 390. When the first oven 100 and the second oven 200 are working, the head and tail of the first oven 100 and the second oven 200 are connected in series, and the fresh air introduced from the first oven 100 and the second oven 200 is recycled for a second time. When the first valve 331 to the fourth valve 391 are opened and the first on-off valve 371 to the sixth on-off valve 322 are closed, the exhaust air of the first preheating and drying section 110 of the first oven 100 is introduced into the first main drying section 120, and the exhaust air of the second preheating and drying section 210 of the second oven 200 is introduced into the second main drying section 220, thereby realizing the secondary utilization of the introduced fresh air. At the same time, the exhaust air of the first drying section 130 of the first oven 100 is introduced into the second preheating and drying section 210 of the second oven 200, and the exhaust air of the second drying section 230 of the second oven 200 is introduced into the first preheating and drying section 110 of the first oven 100, thereby realizing the tertiary utilization of the introduced fresh air. From this, it can be seen that the high temperature and low humidity air in the drying area of ​​the first oven 100 can not only be recycled for drying the electrode itself, but also can be introduced into the second oven 200 for reuse. At the same time, the high temperature and low humidity air in the drying area of ​​the second oven 200 can be recycled for drying the electrode itself, and can also be introduced into the first oven 100, thereby realizing the self-supply and complementary utilization of the high temperature and low humidity air of the first oven 100 and the second oven 200, so as to reduce the introduction of new air into the first oven 100 and the second oven 200, thereby reducing the amount of new air introduced for heating and condensation dehumidification, so as to reduce the energy consumption of the coating and drying equipment.

[0127] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A coating and drying device, characterized in that: include: A first drying oven is formed with a first drying channel, wherein the first drying channel is formed with a first preheating drying section, a first main drying section and a first drying section which are arranged in sequence; A pipeline assembly is arranged outside the first drying channel, and includes a first air inlet duct, a first exhaust duct and a first connecting pipe. The first preheating and drying section, the first main drying section and the first drying section are respectively connected to the first exhaust duct and the first air inlet duct. At least one of the first preheating and drying section and the first drying section is connected to the first main drying section through the first connecting pipe. The first connecting pipe is used to introduce the exhaust air of at least one of the first preheating and drying section and the first drying section into the first main drying section.

2. The coating and drying device according to claim 1, characterized in that: The first preheating and drying section is connected to the first main drying section through the first connecting pipe.

3. The coating and drying device according to claim 1, characterized in that: The pipeline assembly further includes a first valve disposed on the first connecting pipe, and the first valve is used to open or close the first connecting pipe.

4. The coating and drying device according to claim 1, characterized in that: The pipeline assembly includes a second connecting pipe, a second air inlet pipe and a second exhaust pipe, and the coating and drying device also includes a second oven, the second air inlet pipe and the second exhaust pipe are respectively connected to the second oven, and at least one of the first preheating and drying section and the first drying section is connected to the second oven through the second connecting pipe, and the second connecting pipe is used to introduce the exhaust air of at least one of the first preheating and drying section and the first drying section into the second oven.

5. The coating and drying device according to claim 4, characterized in that: The first drying section is connected to the second oven through the second connecting pipe.

6. The coating and drying device according to claim 4, characterized in that: The second drying oven is formed with a second drying channel, and the second drying channel is formed with a second preheating and drying section, a second main drying section and a second drying section arranged in sequence, the second preheating and drying section, the second main drying section and the second drying section are respectively connected with the second air inlet pipe and the second air exhaust pipe, and at least one of the first preheating and drying section and the first drying section is connected with the second preheating and drying section through the second connecting pipe, and the second connecting pipe is used to introduce the exhaust air of at least one of the first preheating and drying section and the first drying section into the second preheating and drying section.

7. The coating and drying device according to claim 6, characterized in that: The first drying section is connected to the second preheating and drying section through the second connecting pipe.

8. The coating and drying device according to claim 6, characterized in that: The pipeline assembly further includes a second valve disposed on the second connecting pipe, and the second valve is used to open or close the second connecting pipe.

9. The coating and drying device according to any one of claims 6 to 8, characterized in that: The pipeline assembly also includes a third connecting pipe, through which at least one of the second preheating and drying section and the second drying section is connected to the second main drying section, and the third connecting pipe is used to introduce the exhaust air of at least one of the second preheating and drying section and the second drying section into the second main drying section.

10. The coating and drying device according to claim 9, characterized in that: The second preheating and drying section is connected to the second main drying section through the third connecting pipe.

11. The coating and drying device according to claim 9, characterized in that: The pipeline assembly also includes a third valve disposed on the third connecting pipe, and the third valve is used to open or close the third connecting pipe.

12. The coating and drying device according to claim 9, characterized in that: The pipeline assembly also includes a fourth connecting pipe, through which at least one of the second drying section and the second preheating drying section is connected to the first preheating drying section, and the fourth connecting pipe is used to introduce the exhaust air of at least one of the second drying section and the second preheating drying section into the first preheating drying section.

13. The coating and drying device according to claim 12, characterized in that: The pipeline assembly also includes a fourth valve disposed on the fourth connecting pipe, and the fourth valve is used to open or close the fourth connecting pipe.

14. The coating and drying device according to claim 9, characterized in that: The pipeline assembly also includes a first opening and closing valve, which is arranged on the second air inlet pipe. The first opening and closing valve divides the second air inlet pipe into a first air inlet part and a second air inlet part. The first air inlet part is connected to the second preheating and drying section, and the second main drying section and the second drying section are respectively connected to the second air inlet part. At least one of the second preheating and drying section and the second drying section is connected to the second air inlet part through the third connecting pipe.

15. The coating and drying device according to claim 14, characterized in that: At least one of the first preheating and drying section and the first drying section is connected to the first air inlet part through the second connecting pipe.

16. The coating and drying device according to claim 14, characterized in that: The pipeline assembly also includes a second opening and closing valve and a third opening and closing valve, the second opening and closing valve and the third opening and closing valve are arranged at intervals in the second exhaust duct, and divide the second exhaust duct into a first exhaust part, a second exhaust part and a third exhaust part, the first exhaust part, the second exhaust part and the third exhaust part are connected to the second preheating and drying section, the second main drying section and the second drying section respectively, and at least one of the first exhaust part and the third exhaust part is connected to the second air inlet part through the third connecting pipe.

17. The coating and drying device according to any one of claims 6 to 8, characterized in that: The second oven is located on one side of the bottom of the first oven; and / or, along the length direction of the first oven, the second drying section and the first preheating drying section are located on the same side of the first main drying section, and the second preheating drying section and the first drying section are located on the same side of the first main drying section.

18. The coating and drying device according to any one of claims 1 to 8, characterized in that: The pipeline assembly also includes a fourth opening and closing valve arranged on the first air inlet duct, the fourth opening and closing valve divides the first air inlet duct into a first air inlet section and a second air inlet section, the first air inlet section is connected to the first preheating and drying section, the first main drying section and the first drying section are respectively connected to the second air inlet section, and at least one of the first preheating and drying section and the first drying section is connected to the second air inlet section through the first connecting pipe.

19. The coating and drying device according to claim 18, characterized in that: The pipeline assembly also includes a fifth opening and closing valve and a sixth opening and closing valve, and the fifth opening and closing valve and the sixth opening and closing valve are arranged at intervals in the first exhaust duct, and divide the first exhaust duct into a first exhaust section, a second exhaust section and a third exhaust section, the first exhaust section, the second exhaust section and the third exhaust section are connected to the first preheating and drying section, the first main drying section and the first drying section one by one, and at least one of the first exhaust section and the third exhaust section is connected to the second air inlet section through the first connecting pipe.

20. A battery production system, characterized in that: It comprises the coating and drying device as described in claims 1-19, and the coating and drying device is used for drying the pole pieces of the battery.

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