Drying oven suitable for double-side coating

Abstract

The invention provides a drying oven suitable for double-sided coating, and relates to the technical field of coating. The drying oven comprises an oven body, a transmission roller device, a circulating air device, a heating device and two air chambers, the two air chambers are oppositely arranged in the oven body in a spaced mode, the circulating air device is communicated with the oven body, the two air chambers are communicated with the circulating air device through the heating device, and a base material enters from the bottom end of the oven body, passes through the space between the two air chambers and penetrates out of the top end of the oven body. The base material penetrating out of the top end of the box body is connected to the driving roller device; wherein the transmission roller device can drive a base material to move in the vertical direction, the circulating air device can discharge moisture in the box body to the outside, convey outside fresh air to the heating device for heating and convey obtained hot air into the two air chambers, and the two air chambers can blow the hot air to the two faces of the base material respectively so as to dry the base material. Therefore, double-sided coating of the base material is realized, the coating efficiency of the base material is higher, and the production cycle of the lithium battery can be effectively shortened.

Description

Technical Field

[0001] This application relates to the field of coating technology, and particularly to a drying oven suitable for double-sided coating. Background Art

[0002] Coating is a key process in the production of lithium batteries, which mainly includes two parts, namely coating and drying. Coating refers to evenly applying a slurry containing active substances, binders, conductive agents, etc. on a substrate (also called a current collector, such as copper foil, aluminum foil, etc.), and drying refers to drying the slurry on the substrate to remove the organic solvents in the slurry, and finally solidifying the slurry to form a coating with a certain thickness and shape, so as to provide a basis for subsequent battery assembly and charge-discharge reactions.

[0003] In related technologies, usually, a coating machine is first used to coat the slurry on the substrate, and then a drying oven is used to dry the slurry on the substrate. Moreover, the substrate is conveyed horizontally both in the coating machine and the drying oven, which results in that a support roller must be provided on the back surface of the substrate to overcome the self-weight of the substrate, so that only the front surface of the substrate can be coated first, and the back surface of the substrate can be coated until the coating on the front surface of the substrate is completed, seriously reducing the coating efficiency of the substrate and thus prolonging the production cycle of lithium batteries. Summary of the Invention

[0004] This application provides a drying oven suitable for double-sided coating, aiming to solve the problem that the coating efficiency of the substrate in related technologies is relatively low, resulting in a long production cycle of lithium batteries.

[0005] To solve the above-mentioned drawbacks existing in related technologies, this application provides a drying oven suitable for double-sided coating. The drying oven suitable for double-sided coating includes a frame, a box body, a driving roller device, a circulating air device, a heating device, and two air chambers. The box body, the circulating air device, and the heating device are all arranged on the frame. The two air chambers are arranged in the box body relatively and at intervals. The driving roller device is arranged on the outer top wall of the box body. The substrate enters through the bottom end of the box body and passes through between the two air chambers and exits from the top end of the box body. The substrate exiting from the top end of the box body is connected to the driving roller device. The circulating air device is communicated with the box body, and the two air chambers are respectively connected to the circulating air device through the heating device. Specifically, the driving roller device is used to drive the substrate to move in the vertical direction; the circulating air device is used to discharge the moisture in the box body to the outside, and to convey the fresh air from the outside to the heating device for heating to obtain hot air, and then convey the hot air to the two air chambers; the two air chambers are used to blow hot air to the opposite two sides of the substrate respectively to dry the substrate.

[0006] In some implementations, the circulating air device includes an exhaust air device and a supply air device that are connected and communicate with each other. The exhaust air device communicates with the box body, and the two air chambers are respectively connected to the supply air device through a heating device. Specifically, the exhaust air device is used to extract moisture from the box body and split the extracted moisture into a first moisture discharged to the outside and a second moisture conveyed to the supply air device; the supply air device is used to extract fresh air from the outside space, mix the extracted fresh air with the second moisture to obtain a mixed air, heat the mixed air through the heating device to obtain hot air, and convey the hot air into the two air chambers.

[0007] In some implementations, the exhaust air device includes an exhaust fan, an exhaust duct, and a shunt pipe. One end of the shunt pipe is connected to the exhaust fan, and the other end is connected to the supply air device. A shunt component is provided in the shunt pipe. One end of the exhaust duct is connected to the box body, and the other end is connected to the shunt pipe and the pipe orifice faces the shunt component. Specifically, the exhaust fan is used to extract moisture from the box body through the exhaust duct; the exhaust duct is used to convey the moisture into the shunt pipe; the shunt component is used to split the moisture into a first moisture and a second moisture.

[0008] In some implementations, the two air chambers are opposite and spaced apart from each other in the width direction of the box body. The two inner side walls of the box body opposite in the width direction are both spaced apart from the adjacent air chambers to form an exhaust space. On this basis, there are two exhaust ducts. One ends of the two exhaust ducts are respectively connected to the two exhaust spaces, and the other ends of the two exhaust ducts are both connected to the shunt pipe and the pipe orifices both face the shunt component. Further, an exhaust hood is provided at the pipe orifice of each exhaust duct communicating with the corresponding exhaust space.

[0009] In some implementations, the direction in which the moisture enters the shunt pipe is perpendicular to the axial direction of the shunt pipe; the shunt component includes a shunt plate, and the shunt plate is inclined relative to the axis of the shunt pipe. The pipe orifices of the two exhaust ducts connected to the shunt pipe face the opposite two sides of the shunt plate respectively.

[0010] In some implementations, the direction in which the moisture enters the shunt pipe is perpendicular to the axial direction of the shunt pipe; the shunt component includes a partition plate, and the partition plate is perpendicular to the axis of the shunt pipe. The pipe orifices of the two exhaust ducts connected to the shunt pipe face the opposite two ends of the partition plate respectively. Guide air structures are provided on the opposite two sides of the partition plate. The guide air structures include two guide air plates; in the same guide air structure, one ends of the two guide air plates are both provided on the partition plate and are respectively adjacent to the opposite two ends of the partition plate, and the other ends of the two guide air plates extend obliquely towards each other and are joined. Further, the outer side of each guide air plate is recessed towards the direction of the other guide air plate to form an arc-shaped air guiding surface.

[0011] In some implementation solutions, the air supply device includes a blower, an air inlet pipe, and an air supply pipe. One end of the air inlet pipe is connected to the blower, and the other end is connected to the outside. One end of the air supply pipe is connected to the blower, and the other end is connected to the two air chambers through a heating device. The air inlet pipe is connected to a shunt pipe. Specifically, the blower is configured to: extract fresh air from the outside through the air inlet pipe, and cause the fresh air to converge with the second moisture from the shunt pipe in the air inlet pipe to obtain a mixed air; convey the mixed air to the heating device through the air supply pipe for heating to obtain hot air, and convey the hot air to the two air chambers through the air supply pipe.

[0012] In some implementation solutions, in addition to the structure given above, the drying oven further includes a filtering device. The circulating air device is connected to the two air chambers through the heating device and the filtering device in sequence. The filtering device is configured to filter the hot air conveyed by the circulating air device to the two air chambers.

[0013] In some implementation solutions, the air chamber includes a hollow housing. The housings of the two air chambers are respectively connected to the circulating air device through the heating device. A plurality of air nozzles communicating with the inside are provided on the outer side wall of the housing facing the base material. The plurality of air nozzles are spaced apart from each other in the height direction of the housing.

[0014] In some implementation solutions, the two air chambers are opposite and spaced apart from each other in the width direction of the box body. Two guiding components are provided in the box body respectively adjacent to the two air chambers. The two air chambers are respectively slidably connected to the two guiding components. The two guiding components are configured to respectively guide the sliding directions of the two air chambers in the box body; the drying oven further includes a lifting device provided on the outer top wall of the box body. The lifting device has at least two towing ropes. Each air chamber is connected to the lifting device through at least one towing rope. Specifically, the lifting device is configured to drive one air chamber to move obliquely upward in the width direction of the box body and the other air chamber to move obliquely downward in the width direction of the box body by taking in and paying out at least two towing ropes, so that the two air chambers are displaced and move away from each other.

[0015] In some implementations, the lifting device includes a cylinder, a transmission member, a rotating shaft, two fixed pulley assemblies, two fixing plates, and two linkage members. The cylinder, the two fixing plates, and the two fixed pulley assemblies are all disposed on the outer top wall of the box body. The two fixing plates are respectively adjacent to the opposite ends of the box body in the length direction. The opposite ends of the rotating shaft are respectively rotatably inserted into the two fixing plates. The two linkage members are both sleeved on the rotating shaft and are respectively adjacent to the two fixing plates. One end of the transmission member is sleeved on the rotating shaft and is located in the middle of the rotating shaft. The other end of the transmission member is rotatably disposed at the extending end of the piston rod of the cylinder. The telescopic direction of the piston rod of the cylinder is perpendicular to the axial direction of the rotating shaft. The two fixed pulley assemblies are respectively adjacent to the opposite ends of the box body in the length direction. The fixed pulley assembly includes two fixed pulley groups, and the fixed pulley group includes at least one fixed pulley. Specifically, in the same fixed pulley assembly, the two fixed pulley groups are respectively located on the opposite sides of the fixing plate in the width direction of the box body. The traction ropes are wound around the two fixed pulley groups. One ends of the traction ropes on the two fixed pulley groups are respectively connected to the opposite ends of the linkage member, and the other ends of the traction ropes on the two fixed pulley groups are respectively connected to the two air chambers.

[0016] For the drying oven provided in this application, it is composed of a frame, a box body, a transmission roller device, a circulating air device, a heating device, and two air chambers. The box body, the circulating air device, and the heating device are all disposed on the frame. The two air chambers are disposed in the box body relatively and spaced apart from each other. The circulating air device is communicated with the box body. The two air chambers are respectively connected to the circulating air device through the heating device. The base material enters through the bottom end of the box body and passes through between the two air chambers and exits from the top end of the box body. The transmission roller device is disposed on the outer top wall of the box body. The base material exiting from the top end of the box body is connected to the transmission roller device. In actual application, the slurry can be coated on both sides of the base material at the same time, and the drying oven of this application can be used to dry both sides of the base material at the same time, so that the slurry on both sides of the base material is cured to form a coating. That is to say, after the slurry is coated on both sides of the base material, the base material can be sent into the box body from the bottom end of the box body, and then the base material entering the box body passes through between the two air chambers and exits from the top end of the box body. The base material exiting from the top end of the box body will be connected to the transmission roller device, so that the transmission roller device drives the base material to move vertically in the box body (that is, the direction from the bottom end to the top end of the box body). During the process of the transmission roller device driving the base material to move vertically, the circulating air device can extract fresh air from the outside, and convey the extracted fresh air to the heating device for heating to obtain hot air, and the hot air will continue to be conveyed by the circulating air device to the two air chambers, so that the two air chambers respectively blow hot air to both sides of the base material. In this way, the simultaneous drying of both sides of the base material can be realized, and the moisture generated during the drying process will be discharged to the outside by the circulating air device. It can be seen that this application realizes the double-sided coating of the base material, and the coating efficiency of the base material is higher, which can effectively shorten the production cycle of the lithium battery and improve its production efficiency. Description of the Drawings

[0017] To more clearly illustrate the relevant technologies or the technical solutions in the embodiments of the present application, the following will briefly introduce the accompanying drawings required for the description of the relevant technologies or the embodiments of the present application. Obviously, the accompanying drawings in the following description are only some embodiments of the present application, rather than all embodiments. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings.

[0018] Figure 1 Structural schematic diagram of the drying oven provided in the embodiment of the present application from the first perspective;

[0019] Figure 2 Structural schematic diagram of the drying oven provided in the embodiment of the present application from the second perspective;

[0020] Figure 3 Structural schematic diagram of the drying oven provided in the embodiment of the present application after removing the box body;

[0021] Figure 4 Cross-sectional view of the drying oven provided in the embodiment of the present application;

[0022] Figure 5 Structural schematic diagram of the circulating air device provided in the embodiment of the present application from one perspective;

[0023] Figure 6 Cross-sectional view of the circulating air device provided in the embodiment of the present application;

[0024] Figure 7 Structural schematic diagram of the circulating air device provided in the embodiment of the present application from another perspective;

[0025] Figure 8 Flow diagram of moisture, fresh air, and hot air in the circulating air device provided in the embodiment of the present application;

[0026] Figure 9 Provided by the embodiment of the present application Figure 6 Partial enlarged view of part A;

[0027] Figure 10 Assembly drawing of the lifting device and two air chambers provided in the embodiment of the present application;

[0028] Figure 11 Provided by the embodiment of the present application Figure 10 Partial enlarged view of part B.

[0029] The markings in the above respective accompanying drawings represent respectively:

[0030] 1 - Box body, 2 - Driving roller device, 3 - Circulating air device, 4 - Heating device, 5 - Air chamber, 6 - Filter device, 7 - Exhaust space, 8 - Lifting device, 9 - Guide assembly, 10 - Towing rope, 31 - Exhaust device, 32 - Air supply device, 311 - Exhaust fan, 312 - Exhaust duct, 313 - Shunt pipe, 314 - Shunt component, 315 - Exhaust hood, 321 - Blower, 322 - Inlet air duct, 323 - Air supply duct, 3141 - Partition board, 3142 - Air guide plate, 3143 - Arc air guide surface, 51 - Shell, 52 - Air nozzle, 81 - Cylinder, 82 - Transmission part, 83 - Rotating shaft, 84 - Fixed plate, 85 - Linkage part, 86 - Fixed pulley assembly, 861 - Fixed pulley group, 8611 - Fixed pulley. Detailed implementation mode

[0031] In the related art, when producing lithium batteries, it is often necessary to coat the base material. That is, first use a coater to coat the slurry on the base material, and then use a drying oven to dry the slurry on the base material. And the base material is conveyed horizontally in both the coater and the drying oven. This results in that a supporting roller must be provided on the back of the base material to overcome the self-weight of the base material, so that only the front side of the base material can be coated first, and the back side of the base material can be coated until the coating on the front side of the base material is completed. The coating efficiency of the base material is low, and the production cycle of lithium batteries is long. In view of this, the present application proposes a drying oven suitable for double-sided coating in the following embodiments to solve the above-mentioned drawbacks existing in the related art.

[0032] In order to make the purpose, technical solution and advantages of the present application more obvious and understandable, the present application will be clearly and completely described below in conjunction with the embodiments of the present application and the corresponding drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions from beginning to end. It should be understood that the following described embodiments of the present application are only used to explain the present application and are not used to limit the present application. That is, based on the various embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative work belong to the scope of protection of the present application. In addition, the technical features involved in the following described embodiments of the present application can be combined with each other as long as they do not conflict with each other.

[0033] Please refer to Figures 1 to 4 , Figure 1 which is a schematic structural diagram of the drying oven from the first perspective, Figure 2 which is a schematic structural diagram of the drying oven from the second perspective, Figure 3 which is a schematic structural diagram of the drying oven after removing the box body, Figure 4It is a cross-sectional view of a drying oven. This embodiment provides a drying oven suitable for double-sided coating, including a frame (not shown in the figure), a box body 1, a driving roller device 2, a circulating air device 3, a heating device 4, and two air chambers 5. The box body 1, the circulating air device 3, and the heating device 4 are all arranged on the frame. The two air chambers 5 are relatively and spaced apart from each other inside the box body 1. The circulating air device 3 is communicated with the box body 1. The two air chambers 5 are respectively connected to the circulating air device 3 through the heating device 4. The substrate to be dried (such as copper foil, aluminum foil, etc.) enters through the bottom end of the box body 1 and passes through between the two air chambers 5 and exits from the top end of the box body 1. The driving roller device 2 is arranged on the outer top wall of the box body 1. The substrate exiting from the top end of the box body 1 is connected to the driving roller device 2. It should be noted that the frame mainly plays a role of structural support in this embodiment. It is not limited to only supporting and fixing the box body 1, the circulating air device 3, and the heating device 4. It can also support and fix the driving roller device 2 and other devices described below (such as the filtering device 6, the lifting device 8, etc.). It can be designed specifically according to actual needs, and this embodiment does not make a unique limitation on this.

[0034] In this embodiment, the driving roller device 2 is used to drive the substrate to move in the vertical direction; the circulating air device 3 is used to discharge the moisture in the box body 1 to the outside, and convey the fresh air from the outside to the heating device 4 for heating to obtain hot air, and then convey the hot air to the two air chambers 5; the two air chambers 5 are used to blow hot air to the opposite sides of the substrate respectively to dry the substrate. It should be noted that the driving roller device 2 usually consists of a power source (such as an electric motor, a cylinder, an oil cylinder, etc.) and at least one roller shaft. The power source can drive each roller shaft to rotate. Then, winding the substrate around each roller shaft can realize the movement of the substrate in the vertical direction. This is a relatively mature technology in this field, so this embodiment does not describe it in detail. It should also be noted that the air chamber 5 usually consists of a housing 51 (hollow inside) and at least one air nozzle 52 communicated with the inside of the housing 51. This is a relatively mature technology in this field, so this embodiment does not describe it in detail. Then, corresponding to this embodiment, the housings 51 of the two air chambers 5 are respectively connected to the circulating air device 3 through the heating device 4. At least one air nozzle 52 communicated with the inside of the housing 51 is arranged on the outer side wall of the housing 51 facing the substrate. When there are multiple air nozzles 52 on the housing 51, the multiple air nozzles 52 can be irregularly distributed or regularly distributed on the housing 51. For example, the multiple air nozzles 52 are spaced apart from each other in the height direction of the housing 51. It can be designed specifically according to actual needs, and this embodiment does not make a unique limitation on this. In addition, the heating device 4 can adopt any device with a heating function commonly used in this field, such as a bare wire type electric heater, a PTC electric heater, a finned tube heat exchanger, a coil type heat exchanger, etc. It can be selected specifically according to actual needs, and this embodiment does not make a unique limitation on this.

[0035] That is to say, in actual applications, the slurry can be coated on both sides of the substrate simultaneously, and the drying oven of this embodiment can be used to dry both sides of the substrate simultaneously, so that the slurry on both sides of the substrate is cured to form a coating. Specifically, after the slurry is coated on both sides of the substrate, the substrate can be fed into the box body 1 from the bottom end of the box body 1, and then the substrate entering the box body 1 passes through between the two air chambers 5 and exits from the top end of the box body 1. The substrate exiting from the top end of the box body 1 is connected to the driving roller device 2, so that the driving roller device 2 drives the substrate to move vertically in the box body 1 (i.e., the direction pointing from the bottom end to the top end of the box body 1); during the process of the driving roller device 2 driving the substrate to move vertically, the circulating air device 3 can extract fresh air from the outside and transport the extracted fresh air to the heating device 4 for heating to obtain hot air, and the hot air will continue to be transported by the circulating air device 3 to the two air chambers 5, so that the two air chambers 5 blow hot air to both sides of the substrate respectively. In this way, the simultaneous drying of both sides of the substrate can be achieved, and the moisture generated during the drying process will be discharged to the outside by the circulating air device 3. On the one hand, the humidity inside the box body 1 can be reduced, improving the drying effect of the drying oven on the substrate. On the other hand, it is convenient for the fresh air to be replenished into the box body 1.

[0036] As can be seen from the above, this embodiment realizes the double-sided coating of the substrate, and the coating efficiency of the substrate is higher, which can effectively shorten the production cycle of the lithium battery and improve the production efficiency of the lithium battery.

[0037] In some embodiments, please refer to Figures 5 to 9 , Figure 5 which is a schematic structural diagram of the circulating air device from a perspective. Figure 6 which is a cross-sectional view of the circulating air device. Figure 7 which is a schematic structural diagram of the circulating air device from another perspective. Figure 8 which is a flow diagram of moisture, fresh air and hot air in the circulating air device. Figure 9 which is Figure 6Partial enlarged view of area A in the figure. The circulating air device 3 includes an exhaust air device 31 and a supply air device 32 that are connected and communicate with each other. The exhaust air device 31 is connected and communicates with the box body 1, and the two air chambers 5 are respectively connected and communicate with the supply air device 32 through the heating device 4. Specifically, during the process that the driving roller device 2 drives the base material to move in the vertical direction, the exhaust air device 31 can extract moisture from the box body 1, and the extracted moisture is divided into first moisture and second moisture, and the first moisture is discharged to the outside, and the second moisture is transported to the supply air device 32; the supply air device 32 can extract fresh air from the outside, and the extracted fresh air is confluent with the second moisture from the exhaust air device 31 to obtain mixed air, and the mixed air is transported to the heating device 4 for heating to obtain hot air, and the hot air is transported to the two air chambers 5. It can be understood that not only the fresh air from the outside but also a part of the moisture discharged from the box body 1 is introduced into the box body 1 of the present application, so that the energy utilization rate of the drying oven can be effectively improved, its investment and operation costs can be reduced, and the purpose of energy conservation and emission reduction can be achieved.

[0038] As at least one of the embodiments, the exhaust air device 31 includes an exhaust fan 311, an exhaust duct 312, and a shunt pipe 313. One end of the shunt pipe 313 communicates with the exhaust fan 311, and the other end communicates with the supply air device 32. A shunt component 314 is provided in the shunt pipe 313. One end of the exhaust duct 312 communicates with the box body 1, and the other end communicates with the shunt pipe 313, and the pipe orifice where the exhaust duct 312 communicates with the shunt pipe 313 faces the shunt component 314. Specifically, during the process that the driving roller device 2 drives the base material to move in the vertical direction, the exhaust fan 311 can extract moisture from the box body 1 through the exhaust duct 312, and the exhaust duct 312 can transport the extracted moisture into the shunt pipe 313. Since the pipe orifice where the exhaust duct 312 communicates with the shunt pipe 313 faces the shunt component 314, the moisture entering the shunt pipe 313 will impact the shunt component 314, and this impact will divide the moisture into first moisture discharged to the outside and second moisture transported to the supply air device 32.

[0039] In this at least one embodiment, the two air chambers 5 are opposite and spaced from each other in the width direction of the box body 1. The two inner side walls of the box body 1 opposite in the width direction are both spaced from the adjacent air chamber 5 to form an exhaust space 7; based on this, there are two exhaust ducts 312. One ends of the two exhaust ducts 312 respectively communicate with the two exhaust spaces 7, the other ends of the two exhaust ducts 312 both communicate with the shunt pipe 313, and the pipe orifices where the two exhaust ducts 312 communicate with the shunt pipe 313 both face the shunt component 314. An exhaust hood 315 is provided at the pipe orifice where each exhaust duct 312 communicates with the corresponding exhaust space 7. It should be noted that the exhaust hood 315 refers to a hood-shaped component for collecting air flow, which can expand the moisture collection range and improve the exhaust efficiency. This belongs to a relatively mature technology in this field, so the present application will not describe it in too much detail.

[0040] In at least one embodiment, the direction of moisture entering the shunt pipe 313 is perpendicular to the axial direction of the shunt pipe 313, and the shunt member 314 includes a partition plate 3141 which is perpendicular to the axis of the shunt pipe 313. The pipe orifices of the two rows of air pipes 312 communicating with the shunt pipe 313 respectively face opposite ends of the partition plate 3141 (i.e., the pipe orifices of the two rows of air pipes 312 communicating with the shunt pipe 313 are opposite to each other). Guide air structures are provided on both opposite sides of the partition plate 3141, and the guide air structures include two guide air plates 3142. In the same guide air structure, one ends of the two guide air plates 3142 are both provided on the partition plate 3141 and are respectively adjacent to opposite ends of the partition plate 3141 (i.e., respectively adjacent to the pipe orifices of the two rows of air pipes 312 communicating with the shunt pipe 313), and the other ends of the two guide air plates 3142 extend obliquely towards each other and are joined. The outer sides (i.e., the sides away from the other guide air plate 3142) of each guide air plate 3142 are recessed towards the direction of the other guide air plate 3142 to form an arc-shaped guide air surface 3143. It can be understood that the moisture entering the shunt pipe 313 through the two rows of air pipes 312 will respectively impact opposite ends of the shunt member 314, and under the guidance of the guide air plates 3142 and their arc-shaped guide air surfaces 3143 on both sides of the partition plate 3141, it is shunted into a first moisture discharged to the outside and a second moisture delivered to the air supply device 32.

[0041] Of course, the structure of the shunt member 314 is not limited to this. As long as it can achieve shunting the moisture into a first moisture and a second moisture. Exemplarily, in other embodiments, the shunt member 314 may include a shunt plate which is inclined relative to the axis of the shunt pipe 313, and the pipe orifices of the two rows of air pipes 312 communicating with the shunt pipe 313 respectively face opposite sides of the shunt plate. It can be understood that the moisture entering the shunt pipe 313 through the two rows of air pipes 312 will respectively impact opposite sides of the shunt member 314. Since the direction of the moisture entering the shunt pipe 313 is perpendicular to the axial direction of the shunt pipe 313 and the shunt plate is inclined relative to the axis of the shunt pipe 313, the moisture will be shunted into a first moisture discharged to the outside and a second moisture delivered to the air supply device 32 under the guidance of opposite sides of the shunt plate.

[0042] As at least one of the embodiments, the air supply device 32 includes a blower 321, an air inlet pipe 322 and an air supply pipe 323. One end of the air inlet pipe 322 communicates with the blower 321, and the other end is connected to the outside. One end of the air supply pipe 323 communicates with the blower 321, and the other end communicates with the two air chambers 5 in the box body 1 through the heating device 4. The air inlet pipe 322 communicates with the shunt pipe 313. Specifically, during the process that the driving roller device 2 drives the base material to move in the vertical direction, the blower 321 can extract fresh air from the outside through the air inlet pipe 322, and make the extracted fresh air converge with the second moisture from the shunt pipe 313 in the air inlet pipe 322 to obtain a mixed air, and convey the mixed air to the heating device 4 through the air supply pipe 323 for heating to obtain hot air, and convey the hot air to the two air chambers 5 through the air supply pipe 323.

[0043] In some embodiments, please refer to Figures 1 to 9 , in addition to the structure given above, the drying oven further includes a filtering device 6. The circulating air device 3 communicates with the two air chambers 5 through the heating device 4 and the filtering device 6 in sequence. The filtering device 6 can filter the hot air conveyed by the circulating air device 3 to the two air chambers 5. It should be noted that the filtering device 6 can adopt any device with a filtering function commonly used in the art, such as a plate filter, a pleated filter, a bag filter, a high-efficiency particulate air (HEPA) filter, an ultra-high efficiency particulate air (ULPA) filter, a granular activated carbon filter, an activated carbon fiber filter, an electrostatic filtering structure, etc., and can be specifically selected according to actual needs. The present application does not make a unique limitation thereto.

[0044] In some embodiments, please combine Figure 10 and Figure 11 , Figure 10 is an assembly drawing of the lifting device and the two air chambers, Figure 11 is Figure 10Partial enlarged view at B in the figure. Inside the box body 1, there are two guiding components 9 respectively adjacent to the two air chambers 5. The two air chambers 5 are respectively slidably connected to the two guiding components 9, and the two guiding components 9 can respectively guide the sliding directions of the two air chambers 5 in the box body 1. Based on this, in addition to the structure given above, the drying oven further includes a lifting device 8 provided on the outer top wall of the box body 1. The lifting device 8 has at least two towing ropes 10, and each air chamber 5 is connected to the lifting device 8 through at least one towing rope 10. Specifically, the lifting device 8 is used to drive one air chamber 5 to move obliquely upward in the width direction of the box body 1 and the other air chamber 5 to move obliquely downward in the width direction of the box body 1 by retracting and releasing at least two towing ropes 10, so that the two air chambers 5 are displaced and move away from each other, so as to increase the space between the two air chambers 5 for the staff to maintain each component (such as the air chamber 5, the guiding component 9, etc.) in the box body 1. In addition, it should be noted that the guiding component 9 mainly plays the role of guiding the sliding direction of the air chamber 5 in the box body 1 in this application. It is usually composed of at least one guiding structure, which is a relatively mature technology in this field, so this application will not describe it in too much detail. It should also be noted that the guiding structures include linear guide rails, dovetail guide rails, T-shaped guide rails, crossed roller guide rails, guide pillars and bushings, etc., which can be specifically selected according to actual needs, and this application does not make a unique limitation on this.

[0045] It can be understood that when it is necessary to maintain the components (such as the air chamber 5, the guiding component 9, etc.) in the box body 1, the two air chambers 5 can be controlled to move obliquely away from each other in the width direction of the box body 1 (that is, one air chamber 5 moves obliquely upward and the other air chamber 5 moves obliquely downward) through the lifting device 8, so as to increase the space between the two air chambers 5 to facilitate the maintenance operation of the staff. After the staff has completed the maintenance of each component in the box body 1, the two air chambers 5 can be controlled to move obliquely towards each other in the width direction of the box body 1 (that is, the air chamber 5 that moved obliquely upward before now moves obliquely downward, and the air chamber 5 that moved obliquely downward before now moves obliquely upward) through the lifting device 8 until the two air chambers 5 are aligned in the width direction of the box body 1 (that is, the two air chambers 5 are reset), and then the drying of the substrate can be continued.

[0046] As at least one of the embodiments, the lifting device 8 includes a cylinder 81 (or other power sources commonly used in the art, such as motors, oil cylinders, etc.), a transmission member 82, a rotating shaft 83, two fixing plates 84, two linkage members 85, and two fixed pulley assemblies 86. The cylinder 81, the two fixing plates 84, and the two fixed pulley assemblies 86 are all provided on the outer top wall of the box body 1. The two fixing plates 84 are respectively adjacent to the opposite ends of the box body 1 in the length direction. The opposite ends of the rotating shaft 83 are respectively rotatably inserted into the two fixing plates 84. The two linkage members 85 are both sleeved on the rotating shaft 83 and are respectively adjacent to the two fixing plates 84. One end of the transmission member 82 is sleeved on the rotating shaft 83 and is located in the middle of the rotating shaft 83. The other end of the transmission member 82 is rotatably provided at the extending end of the piston rod of the cylinder 81. The rotation axis of the transmission member 82 is parallel to the axis of the rotating shaft 83. The extending / retracting direction of the piston rod of the cylinder 81 is perpendicular to the axial direction of the rotating shaft 83. The two fixed pulley assemblies 86 are respectively adjacent to the opposite ends of the box body 1 in the length direction. The fixed pulley assembly 86 includes two fixed pulley groups 861. The fixed pulley group 861 includes at least one fixed pulley 8611. Specifically, in the same fixed pulley assembly 86, the two fixed pulley groups 861 are respectively located on the opposite sides of the corresponding fixing plate 84 in the width direction of the box body 1. The traction ropes 10 are wound around the two fixed pulley groups 861. One ends of the traction ropes 10 on the two fixed pulley groups 861 are respectively connected to the opposite ends of the linkage member 85. The other ends of the traction ropes 10 on the two fixed pulley groups 861 are respectively connected to the two air chambers 5.

[0047] It can be understood that there is a sequential connection relationship among the piston rod of the cylinder 81, the transmission member 82, the rotating shaft 83, the two linkage members 85, the two fixed pulley assemblies 86, the plurality of traction ropes 10, and the two air chambers 5 in this application. The extension / retraction of the piston rod of the cylinder 81 will cause the transmission member 82, the rotating shaft 83, and the two linkage members 85 to rotate synchronously in different directions, so that the two air chambers 5 can be driven by the plurality of traction ropes 10 to move obliquely away from / towards each other in the width direction of the box body 1, thereby realizing the opening and closing of the two air chambers 5.

[0048] The above embodiments are only preferred implementations of the present application, and they are not the only limitations on the relevant contents of the drying oven; in this regard, ordinary technicians in this field can flexibly set them according to the actual application scenarios based on the above embodiments. It can be understood that through the implementation of the above embodiments of the present application, the drying oven is composed of a frame, a box 1, a transmission roller device 2, a circulating air device 3, a heating device 4 and two air chambers 5. The box 1, the circulating air device 3 and the heating device 4 are all arranged on the frame, and the two air chambers 5 are arranged in the box 1 opposite to each other and spaced apart from each other. The circulating air device 3 is connected to the box 1, and the two air chambers 5 are respectively connected to the circulating air device 3 through the heating device 4. The substrate enters through the bottom end of the box 1 and passes through the two air chambers 5 from the top of the box 1. The transmission roller device 2 is arranged on the outer top wall of the box 1, and the substrate passing through the top of the box 1 is connected to the transmission roller device 2. In practical applications, the slurry can be coated on both sides of the substrate at the same time, and the drying oven of the present application can be used to dry both sides of the substrate at the same time, so that the slurry on both sides of the substrate is solidified to form a coating; that is, after the slurry coating on both sides of the substrate is completed, the substrate can be fed into the box body 1 from the bottom end of the box body 1, and then the substrate entering the box body 1 passes through between the two air chambers 5 and passes out from the top of the box body 1, and the substrate passing through the top of the box body 1 will be connected to the transmission roller device 2, so that the transmission roller device 2 drives the substrate to move in the box body 1 along the vertical direction (i.e., the direction from the bottom end of the box body 1 to the top end); in the process of the transmission roller device 2 driving the substrate to move in the vertical direction, the circulating air device 3 can extract fresh air from the outside, and transport the extracted fresh air to the heating device 4 for heating to obtain hot air, and the hot air will continue to be transported by the circulating air device 3 to the two air chambers 5, so that the two air chambers 5 respectively blow hot air to both sides of the substrate, so that the simultaneous drying of both sides of the substrate can be achieved, and the moisture generated during the drying process will be discharged to the outside by the circulating air device 3. It can be seen that the present application achieves double-sided coating of the substrate, the coating efficiency of the substrate is higher, and the production cycle of the lithium battery can be effectively shortened and the production efficiency of the lithium battery can be improved.

[0049] It should be noted that several embodiments shown above in this application are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. For the same or similar parts among the embodiments, reference can be made to each other. It should also be noted that in the textual description of this application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is such an actual relationship or order between these entities or operations. Further, the term "comprise", "include" or any other corresponding variant is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes these elements, but may also include other elements not explicitly listed, or may also include elements inherent to this process, method, article or device; moreover, without more limitations, an element defined by the statement "including one..." does not exclude the existence of another identical element in the process, method, article or device including the said element.

[0050] In addition, by implementing several embodiments shown above in this application, those skilled in the art can implement or use this application. For the several embodiments shown above in this application, various modifications will be obvious to those skilled in the art. The general principles defined in this application can be implemented in other embodiments not shown without departing from the spirit or scope of this application. Therefore, this application will not be limited to the several embodiments shown above, but rather will conform to the broadest scope consistent with the principles and novel features disclosed in this application.

Claims

1. A drying oven suitable for double-sided coating, characterized in that, It includes a frame, a box body, a driving roller device, a circulating air device, a heating device and two air chambers. The box body, the circulating air device and the heating device are all arranged on the frame. The two air chambers are arranged in the box body relatively and spaced apart from each other. The driving roller device is arranged on the outer top wall of the box body. The base material enters through the bottom end of the box body, passes between the two air chambers and exits from the top end of the box body. The base material exiting from the top end of the box body is connected to the driving roller device. The circulating air device is communicated with the box body, and the two air chambers are respectively connected to the circulating air device through the heating device; The driving roller device is used to drive the base material to move in the vertical direction; the circulating air device is used to discharge the moisture in the box body to the outside, and convey the fresh air from the outside to the heating device for heating to obtain hot air, and convey the hot air to the two air chambers; the two air chambers are used to blow the hot air to the opposite sides of the base material respectively to dry the base material.

2. The drying oven according to claim 1, characterized in that, The circulating air device includes a exhaust device and a supply device which are communicated with each other. The exhaust device is communicated with the box body, and the two air chambers are respectively connected to the supply device through the heating device, where: The exhaust device is used to extract the moisture from the box body and divide the moisture into a first moisture discharged to the outside and a second moisture conveyed to the supply device; The supply device is used to extract the fresh air from the outside, make the fresh air converge with the second moisture to obtain a mixed air, convey the mixed air to the heating device for heating to obtain the hot air, and convey the hot air to the two air chambers.

3. The drying oven according to claim 2, wherein, The exhaust device includes an exhaust fan, an exhaust pipe and a shunt pipe. One end of the shunt pipe is communicated with the exhaust fan, and the other end is communicated with the supply device. A shunt component is arranged in the shunt pipe. One end of the exhaust pipe is communicated with the box body, and the other end is communicated with the shunt pipe and the pipe orifice faces the shunt component, where: The exhaust fan is used to extract the moisture from the box body through the exhaust pipe; The exhaust pipe is used to convey the moisture into the shunt pipe; The shunt component is used to divide the moisture into the first moisture and the second moisture.

4. The drying oven according to claim 3, wherein, The two air chambers are opposite and spaced apart from each other in the width direction of the box body. The two inner side walls of the box body opposite in the width direction are spaced apart from the adjacent air chambers to form an exhaust space; there are two exhaust pipes. One ends of the two exhaust pipes are respectively communicated with the two exhaust spaces, and the other ends of the two exhaust pipes are both communicated with the shunt pipe and the pipe orifices both face the shunt component.

5. The drying oven according to claim 4, characterized in that, An exhaust hood is arranged at the pipe orifice of each exhaust pipe communicated with the corresponding exhaust space.

6. The drying oven according to claim 4, characterized in that, The direction in which the moisture enters the shunt pipe is perpendicular to the axis of the shunt pipe; the shunt component includes a shunt plate which is inclined relative to the axis of the shunt pipe. The pipe orifices of the two exhaust pipes communicated with the shunt pipe face the opposite sides of the shunt plate respectively.

7. The drying oven according to claim 4, characterized in that, The direction in which the moisture enters the shunt pipe is perpendicular to the axis of the shunt pipe; The shunt component includes a partition plate perpendicular to the axis of the shunt pipe. The nozzles of the two exhaust pipes communicating with the shunt pipe face opposite ends of the partition plate respectively. Guide wind structures are provided on both opposite sides of the partition plate, and each guide wind structure includes two guide wind plates. In the same guide wind structure, one ends of the two guide wind plates are provided on the partition plate and are adjacent to opposite ends of the partition plate respectively, and the other ends of the two guide wind plates extend obliquely towards each other and meet.

8. The drying oven according to claim 7, characterized in that, An arc-shaped wind guiding surface is formed by the outer side of each guide wind plate being recessed towards the other guide wind plate.

9. The drying oven according to claim 3, characterized in that, The air supply device includes a blower, an air inlet pipe and an air supply pipe. One end of the air inlet pipe is connected to the blower and the other end is connected to the outside. One end of the air supply pipe is connected to the blower and the other end is connected to the two air chambers through the heating device. The air inlet pipe is connected to the shunt pipe. The blower is configured to: extract the fresh air from the outside through the air inlet pipe, and make the fresh air converge with the second moisture from the shunt pipe in the air inlet pipe to obtain the mixed air; convey the mixed air to the heating device through the air supply pipe for heating to obtain the hot air, and convey the hot air to the two air chambers through the air supply pipe.

10. The drying oven according to claim 1, characterized in that, It further includes a filtering device. The circulating air device is connected to the two air chambers through the heating device and the filtering device in sequence. The filtering device is used to filter the hot air conveyed by the circulating air device to the two air chambers.

11. The drying oven according to claim 1, characterized in that, The air chamber includes a hollow housing. The housings of the two air chambers are respectively connected to the circulating air device through the heating device. A plurality of air nozzles communicating with the inside are provided on the outer side wall of the housing facing the substrate, and the plurality of air nozzles are spaced from each other in the height direction of the housing.

12. The drying oven according to claim 1, characterized in that, The two air chambers are opposite and spaced from each other in the width direction of the box body. Two guiding components are provided in the box body adjacent to the two air chambers respectively. The two air chambers are respectively slidably connected to the two guiding components, and the two guiding components are used to guide the sliding directions of the two air chambers in the box body respectively. The drying oven further includes a lifting device provided on the outer top wall of the box body. The lifting device has at least two traction ropes, and each air chamber is connected to the lifting device through at least one traction rope. The lifting device is used to drive one air chamber to move obliquely upward in the width direction of the box body and the other air chamber to move obliquely downward in the width direction of the box body by taking in and releasing the at least two traction ropes, so that the two air chambers are displaced and move away from each other.

13. The drying oven according to claim 12, characterized in that, The lifting device includes a cylinder, a transmission member, a rotating shaft, two fixing plates, two linkage members and two fixed pulley assemblies. The cylinder, the two fixing plates and the two fixed pulley assemblies are all arranged on the outer top wall of the box body. The two fixing plates are respectively adjacent to the opposite ends of the box body in the length direction. The opposite ends of the rotating shaft are respectively rotatably inserted into the two fixing plates. The two linkage members are both sleeved on the rotating shaft and are respectively adjacent to the two fixing plates. One end of the transmission member is sleeved on the rotating shaft, and the other end is rotatably arranged at the extending end of the piston rod of the cylinder. The telescopic direction of the piston rod is perpendicular to the axial direction of the rotating shaft. The two fixed pulley assemblies are respectively adjacent to the opposite ends of the box body in the length direction. The fixed pulley assembly includes two fixed pulley groups, and the fixed pulley group includes at least one fixed pulley; In the same fixed pulley assembly, the two fixed pulley groups are respectively located on the opposite sides of the fixing plate in the width direction of the box body. The traction ropes are wound around the two fixed pulley groups. One ends of the traction ropes on the two fixed pulley groups are respectively connected to the opposite ends of the linkage member, and the other ends of the traction ropes on the two fixed pulley groups are respectively connected to the two air chambers.

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