Infrared heating oven
By using insulated channels and fan components in the infrared heating oven to prevent NMP gas from explosion, and drying the substrate on both sides with upper and lower hot air components, the problems of complex pipeline layout and low drying efficiency in the prior art are solved, and safety and efficiency are improved.
Patent Information
- Application Number
- CN202421948599.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-12
- Publication Date
- 2025-07-11
- Estimated Expiration
- 2034-08-12
AI Technical Summary
The existing infrared drying module pipelines are complex in layout and cumbersome in installation. The structures of the positive electrode and negative electrode infrared drying modules are large, which increases the production or procurement costs. At the same time, there is a risk of NMP gas coming into contact with infrared lamps and explosions, and the drying efficiency is low.
An infrared heating oven is designed, using infrared lamp tubes to be installed in the insulation channel, the fan assembly is inlet to maintain positive pressure, the pipe is arranged outside the box, and the front and back sides of the substrate are dried in combination with the upper and lower hot air components, and the light-transmitting components and glass transmit infrared rays, simplifying the pipeline layout and improving drying efficiency.
Improves the safety performance of the equipment, prevents NMP gas explosion, simplifies pipeline installation, and achieves the simultaneous drying of the front and back sides of the substrate, improving drying efficiency.
Smart Images
Figure CN223090977U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of ovens, and particularly relates to an infrared heating oven. Background Art
[0002] In the production process of lithium batteries, it is necessary to dry the electrode sheets. Currently, common electrode sheet drying methods include hot air drying, infrared drying, and laser drying. Among them, infrared drying is a drying method in which infrared rays are emitted by an infrared device, radiate onto the electrode sheet, and heat the electrode sheet to achieve drying.
[0003] Infrared drying can be divided into positive electrode drying coating and negative electrode drying coating from the coating type. When performing positive electrode drying coating, NMP (N-methylpyrrolidone) gas will be generated. NMP (N-methylpyrrolidone) gas is a flammable and explosive gas. Therefore, the structure of the positive electrode infrared drying module needs to ensure its explosion-proof function while meeting the requirements of sealing and cooling. The negative electrode infrared drying module only needs to meet the cooling function.
[0004] The existing infrared drying module includes a lamp cover and infrared lamp tubes. The infrared lamp tubes are arranged inside the lamp cover. Most of the infrared lamp tubes are quartz glass tubes, with a maximum allowable temperature of 600°C, and the temperature of the crimping part shall not exceed 250°C. Currently, the cooling method of the used infrared drying module is to pass cooling air into the lamp cover through a pipeline.
[0005] However, the pipelines of the existing infrared drying module are all arranged inside the oven, with a complex pipeline layout and cumbersome installation. Moreover, the structural differences between the positive electrode infrared drying module and the negative electrode infrared drying module are large, increasing the manufacturing or procurement cost. Content of the Utility Model
[0006] In order to overcome the deficiencies of the prior art, the utility model provides an infrared heating oven, which can simplify the pipeline layout, facilitate the installation of pipelines, prevent the explosion caused by the contact between NMP (N-methylpyrrolidone) gas and infrared lamp tubes, improve the safety performance of the equipment, and can simultaneously perform hot air drying and infrared drying on the front and back sides of the base material, improving the drying efficiency of the electrode sheet.
[0007] The technical solution adopted by the utility model to solve its technical problems is:
[0008] An infrared heating oven for drying electrode sheets, comprising: a box body with a feed inlet and a discharge outlet respectively arranged on two sides, and having a heating chamber inside. The feed inlet and the discharge outlet are respectively for a substrate to enter and exit the heating chamber; an infrared drying mechanism, including a plurality of heat insulation channels and infrared lamps respectively arranged in the plurality of heat insulation channels. The plurality of heat insulation channels are horizontally arranged along the conveying direction of the electrode sheet, the length direction of the plurality of heat insulation channels is perpendicular to the conveying direction of the substrate, the plurality of heat insulation channels are evenly distributed on the upper and lower sides of the substrate, both ends of the heat insulation channels respectively penetrate through two sides of the box body, one end of the heat insulation channel is connected with a fan assembly for introducing air into the heat insulation channel, and a light-transmitting assembly is arranged on one side of the heat insulation channel close to the substrate, and the infrared light emitted by the infrared lamp irradiates the substrate through the light-transmitting assembly; a hot air drying mechanism, including two hot air assemblies located on the upper and lower sides of the substrate. The hot air assembly includes a hull and a plurality of air nozzles. The hull is arranged in the box body, and the plurality of air nozzles are sequentially arranged on the hull along the conveying direction of the electrode sheet, and the air nozzles blow hot air on the substrate, and the air nozzles and the heat insulation channels are arranged alternately.
[0009] As a further improvement of the above technical solution, the heat insulation channel includes an inner layer and an outer layer, and a heat insulation layer is formed between the inner layer and the outer layer.
[0010] As a further improvement of the above technical solution, the infrared drying mechanism further includes a front door assembly and a rear door assembly; the front door assembly includes a front door body and a plurality of cover plates. The cover plates are provided with a plurality of air vents, the front door body is provided with a plurality of windows, and the plurality of cover plates respectively cover the plurality of windows. One end of each of the plurality of heat insulation channels is respectively communicated with the plurality of windows; the rear door assembly includes a wind hood, and the other ends of the plurality of heat insulation channels are all connected with the wind hood, and the wind hood is connected with the fan assembly.
[0011] As a further improvement of the above technical solution, the cover plate is a transparent plate.
[0012] As a further improvement of the above technical solution, the fan assembly includes an air duct and a blower. One end of the air duct is communicated with the wind hood, and the other end of the air duct is communicated with the air outlet end of the blower.
[0013] As a further improvement of the above technical solution, a filter is arranged at the air inlet end of the blower.
[0014] As a further improvement of the above technical solution, a sealing rubber strip is arranged between the front door body and the heat insulation channel.
[0015] As a further improvement of the above technical solution, the infrared lamp tube is fixed on the heat insulation channel through a support assembly. The support assembly includes a long bracket and lamp tube brackets respectively arranged on both sides of the long bracket. The long bracket is connected to the side of the heat insulation channel away from the light transmission assembly, and the two lamp tube brackets are respectively used to fix both ends of the infrared lamp tube.
[0016] As a further improvement of the above technical solution, a height adjustment bracket is arranged between the long bracket and the lamp tube bracket. The height adjustment bracket is provided with an installation long slot. The lamp tube bracket is fixed at one end of the height adjustment bracket, and the long bracket is connected to the installation long slot through bolts and nuts.
[0017] As a further improvement of the above technical solution, the light transmission assembly includes an installation frame and glass installed on the installation frame. A stepped groove is arranged on the side of the heat insulation channel close to the base material, and the installation frame is installed on the stepped groove through screws.
[0018] As a further improvement of the above technical solution, the number of the glasses is two. The two glasses are arranged in parallel, and a spacer is arranged between the two glasses.
[0019] The beneficial effects of the present utility model are as follows:
[0020] 1. The present utility model provides an infrared heating oven. By setting a heat insulation channel, the infrared lamp tube is arranged in the heat insulation channel, and the heat insulation channel penetrates through both sides of the box body. One end of the heat insulation channel is connected to a fan assembly. On the one hand, the fan assembly introduces air into the heat insulation channel to keep the inside of the heat insulation channel under positive pressure all the time, so as to ensure that the NMP (N-methylpyrrolidone) gas inside the box body cannot enter the heat insulation channel. Thus, it can prevent the NMP (N-methylpyrrolidone) gas from contacting the infrared lamp tube and causing an explosion, and improve the safety performance of the equipment. On the other hand, both ends of the heat insulation channel penetrate through both sides of the box body respectively, and pipelines can be arranged from the ends of the heat insulation channel. That is to say, the pipelines are arranged outside the box body, which is convenient for installation.
[0021] 2. The present utility model provides an infrared heating oven. By setting two hot air assemblies respectively located on the upper and lower sides of the base material, a plurality of air nozzles in the hot air assemblies are arranged in sequence along the moving direction of the base material, and the air nozzles and the heat insulation channel are arranged alternately. The air nozzles blow hot air on the base material, and the infrared light emitted by the infrared lamp tube in the heat insulation channel irradiates on the base material for heating. Thus, it can perform hot air drying and infrared drying on both the front and back sides of the base material at the same time, and improve the drying efficiency of the pole piece. Description of the Drawings
[0022] The present utility model will be further described below with reference to the drawings and embodiments.
[0023] Figure 1It is a schematic structural diagram provided by an example of the present utility model;
[0024] Figure 2 is Figure 1 a cross-sectional view perpendicular to the moving direction of the substrate in
[0025] Figure 3 is Figure 1 a cross-sectional view along the moving direction of the substrate in
[0026] Figure 4 is a three-dimensional view of the heat insulation channel;
[0027] Figure 5 is Figure 4 a schematic diagram of the internal structure of the heat insulation channel in
[0028] Figure 6 is Figure 2 a cross-sectional view of the heat insulation channel in
[0029] Figure 7 is Figure 6 an enlarged view of part A in
[0030] Reference numerals: 1 - box body, 11 - feed inlet, 12 - discharge outlet, 13 - heating chamber;
[0031] 2 - infrared drying mechanism, 21 - heat insulation channel, 22 - infrared lamp tube, 23 - fan assembly, 24 - light transmission assembly, 25 - front door assembly, 26 - air hood, 27 - support assembly, 211 - inner layer, 212 - outer layer, 213 - heat insulation layer, 214 - stepped groove, 231 - air duct, 232 - blower, 233 - filter, 241 - mounting frame, 242 - glass, 243 - screw, 244 - flat rubber strip, 245 - spacer, 246 - L-shaped pressing block, 251 - front door body, 252 - cover plate, 253 - sealing rubber strip, 271 - long bracket, 272 - lamp tube holder, 273 - height adjustment bracket, 2411 - outer flange, 2412 - inner flange, 2521 - air vent, 2511 - window, 2731 - mounting long groove;
[0032] 3 - hot air drying mechanism, 31 - hot air assembly, 311 - hull, 312 - air nozzle;
[0033] 4 - substrate. Detailed implementation manners
[0034] The concept, specific structure and technical effects of the present utility model will be clearly and completely described below in conjunction with embodiments and the accompanying drawings to fully understand the purpose, features and effects of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, other embodiments obtained by those skilled in the art without creative efforts shall fall within the scope of protection of the present utility model. In addition, all connection / linkage relationships involved in the patent do not simply refer to the direct connection of components, but refer to the formation of a more optimal connection structure by adding or reducing connection accessories according to specific implementation situations. Each technical feature in the creation of the present utility model can be interactively combined without conflicting with each other.
[0035] Referring to Figures 1 to 4 , an infrared heating oven provided by an example of the present utility model is used for drying a substrate 4, and includes a box body 1, an infrared drying mechanism 2 and a hot air drying mechanism 3.
[0036] Among them, a feed inlet 11 and a discharge outlet 12 are respectively arranged on both sides of the box body 1. The inside of the box body 1 has a heating cavity 13. The feed inlet 11 and the discharge outlet 12 are respectively used for the substrate 4 to enter and exit the heating cavity 13.
[0037] Structurally, the infrared drying mechanism 2 includes a plurality of heat insulation channels 21 and infrared lamp tubes 22 respectively arranged in the plurality of heat insulation channels 21. The plurality of heat insulation channels 21 are horizontally arranged along the conveying direction of the pole pieces. The length direction of the plurality of heat insulation channels 21 is perpendicular to the conveying direction of the substrate 4. The plurality of heat insulation channels 21 are evenly distributed on both the upper and lower sides of the substrate 4. Both ends of the heat insulation channel 21 penetrate through both sides of the box body 1 respectively. One end of the heat insulation channel 21 is connected with a fan assembly 23. The fan assembly 23 is used for introducing air into the heat insulation channel 21. A light transmission assembly 24 is arranged on the side of the heat insulation channel 21 close to the substrate 4. The infrared light emitted by the infrared lamp tube 22 is radiated onto the substrate 4 through the light transmission assembly 24.
[0038] It can be understood that, on the one hand, by setting the fan assembly 23, the fan assembly 23 introduces air into the heat insulation channel 21, so that the inside of the heat insulation channel 21 always maintains a positive pressure to ensure that the NMP (N-methylpyrrolidone) gas inside the box body 1 cannot enter the heat insulation channel 21. Thus, it can prevent the NMP (N-methylpyrrolidone) gas from contacting the infrared lamp tube 22 and causing an explosion, and improve the safety performance of the equipment; on the other hand, both ends of the heat insulation channel 21 penetrate through both sides of the box body 1 respectively, and pipelines can be arranged from the ends of the heat insulation channel 21. That is to say, the pipelines are arranged outside the box body 1. Thus, it is convenient for installation.
[0039] Furthermore, the hot air drying mechanism 3 includes two hot air components 31 located on the upper and lower sides of the base material 4. The hot air component 31 includes a hull 311 and a plurality of air nozzles 312. The hull 311 is arranged in the box body 1, and the plurality of air nozzles 312 are sequentially arranged on the hull 311 along the conveying direction of the pole piece. The air nozzles 312 blow hot air on the base material 4, and the air nozzles 312 and the heat insulation channels 21 are arranged alternately. Thus, hot air drying and infrared drying can be carried out on the front and back sides of the base material 4 simultaneously, improving the drying efficiency of the pole piece.
[0040] Referring to Figure 6 , in some preferred embodiments, the heat insulation channel 21 includes an inner layer 211 and an outer layer 212, and a heat insulation layer 213 is formed between the inner layer 211 and the outer layer 212. Thus, the heat insulation effect of the heat insulation channel 21 can be improved.
[0041] Referring to Figure 1 and Figure 3 , further, the infrared drying mechanism 2 further includes a front door assembly 25 and a rear door assembly, and the two ends of the heat insulation channel 21 are respectively connected to the front door assembly 25 and the rear door assembly.
[0042] Specifically, the front door assembly 25 includes a front door body 251 and a plurality of cover plates 252. The cover plates 252 are provided with a plurality of air vents 2521, and the front door body 251 is provided with a plurality of windows 2511. The plurality of cover plates 252 are respectively covered on the plurality of windows 2511, and one ends of the plurality of heat insulation channels 21 are respectively communicated with the plurality of windows 2511.
[0043] More specifically, the cover plate 252 is a transparent plate, and the transparent plate is an acrylic plate, which is convenient for workers to observe the inside of the heat insulation channel 21 through the cover plate 252.
[0044] In order to improve the sealing performance of the oven, a sealing strip 253 is arranged between the front door body 251 and the heat insulation channel 21, which can prevent the gas in the box body 1 from leaking to the outside of the box body 1.
[0045] The rear door assembly includes a wind hood 26, and the other ends of the plurality of heat insulation channels 21 are all connected to the wind hood 26. The wind hood 26 is connected to the fan assembly 23.
[0046] Specifically, the fan assembly 23 includes an air duct 231 and a blower 232. One end of the air duct 231 is communicated with the wind hood 26, and the other end of the air duct 231 is communicated with the air outlet end of the blower 232. The blower 232 flows the air along the air duct 231 to the wind hood 26, then from the wind hood 26 to the plurality of heat insulation channels 21, and finally flows out from the plurality of air vents 2521 on the cover plate 252. Thus, the layout of the pipeline can be simplified, the number of pipelines can be reduced, and it is convenient for installation and maintenance.
[0047] Referring to Figure 5 and Figure 6, in some preferred embodiments, the infrared lamp tube 22 is fixed on the heat insulation channel 21 through the support assembly 27. The support assembly 27 includes a long bracket 271 and lamp tube brackets 272 respectively arranged on both sides of the long bracket 271. The long bracket 271 is connected to the side of the heat insulation channel 21 away from the light transmission component 24. The two lamp tube brackets 272 are respectively used to fix both ends of the infrared lamp tube 22. Thus, it can be avoided that the infrared lamp tube 22 is in direct contact with the heat insulation channel 21, which is conducive to the heat dissipation of the infrared lamp tube 22. Moreover, it can be avoided that the heat of the infrared lamp tube 22 is transferred to the heat insulation channel 21.
[0048] Furthermore, a height adjustment bracket 273 is arranged between the long bracket 271 and the lamp tube bracket 272. The height adjustment bracket 273 is provided with an installation long slot 2731. The lamp tube bracket 272 is fixed at one end of the height adjustment bracket 273. The long bracket 271 is connected to the installation long slot 2731 through bolts and nuts. Thus, the distance between the infrared lamp tube 22 and the light transmission component 24 can be adjusted. Furthermore, the distance between the infrared lamp tube 22 and the base material 4 can be adjusted, which is convenient for controlling the heat of the infrared light emitted by the infrared lamp tube 22 radiating onto the base material 4.
[0049] Refer to Figure 6 and Figure 7 , in some preferred embodiments, the light transmission component 24 includes an installation frame 241 and glass 242 installed on the installation frame 241. A stepped groove 214 is arranged on the side of the heat insulation channel 21 close to the base material 4. The installation frame 241 is installed on the stepped groove 214 through screws 243. The stepped groove 214 can limit the installation frame 241. Thus, the assembly accuracy between the installation frame 241 and the heat insulation channel 21 can be guaranteed.
[0050] It should be noted that the infrared light emitted by the infrared lamp tube 22 passes through the glass 242 and then radiates onto the base material 4. On the one hand, the light transmittance of the glass 242 is relatively high, which can improve the heat transfer efficiency of the infrared light. On the other hand, the glass 242 has the characteristic of high temperature resistance. Compared with other materials, such as acrylic plates and other materials, the service life of the glass 242 is longer. Thus, the replacement frequency of parts can be reduced and the cost can be lowered.
[0051] Specifically, in order to further improve the light transmittance of the glass 242, the glass 242 adopts rainbow glass 242. Moreover, both sides of the rainbow glass 242 are coated. More specifically, an antireflection film with a wavelength of 940nm ± 10nm is coated on both sides of the rainbow glass 242.
[0052] During assembly, first install the glass 242 on the installation frame 241, and then install the installation frame 241 on the stepped groove 214 through screws 243. Thus, the installation and disassembly of the light transmission component 24 are facilitated, and the cleaning and replacement of the glass 242 are facilitated.
[0053] Further, a flat rubber strip 244 is provided between the stepped groove 214 and the mounting frame 241. When the screw 243 fixes the mounting frame 241 on the stepped groove 214, the edge of the mounting frame 241 presses the flat rubber strip 244 against the stepped groove 214, thereby improving the sealing performance between the mounting frame 241 and the heat insulation channel 21 and preventing the heat in the heating cavity 13 from being transferred into the heat insulation channel 21.
[0054] Further, the number of the glasses 242 is two. The two glasses 242 are arranged in parallel, and a spacer 245 is provided between the two glasses 242. The spacer 245 can form an air layer between the two glasses 242, thereby enabling the light-transmitting component 24 to have a certain heat insulation effect, reducing the heat transfer from the heating cavity 13 into the heat insulation channel 21, and at the same time, preventing the NMP (N-methylpyrrolidone) gas from condensing due to excessive temperature drop.
[0055] Furthermore, the mounting frame 241 has an outer flange 2411 and an inner flange 2412. The outer flange 2411 cooperates with the stepped groove 214, and the inner flange 2412 is used to support the edge of the glass 242.
[0056] Specifically, a plurality of mounting holes are provided in the outer flange 2411. The outer flange 2411 is stacked on the stepped groove 214, and the screw 243 passes through the mounting holes and is connected to the stepped groove 214, which is convenient for installation.
[0057] When installing the glass 242, first place one of the glasses 242 on the inner flange 2412 so that the inner flange 2412 supports the edge of one of the glasses 242. Then, place the spacer 245 on the edge of the glass 242. Next, place the other glass 242 on the spacer 245 so that the spacer 245 supports the edge of the other glass 242. Finally, press the other glass 242 tightly by an L-shaped pressing block 246. The L-shaped pressing block 246 is connected to the mounting frame 241, thereby enabling the double-layer glass 242 to be installed firmly.
[0058] It should be noted that the connection manner between the L-shaped pressing block 246 and the mounting frame 241 is not limited. They can be bonded together by glass glue or fixed together by screws 243.
[0059] The above is a specific description of the preferred embodiment of the present invention. However, the present invention is not limited to the described embodiment. Those skilled in the art can make various equivalent deformations or substitutions without departing from the spirit of the present invention, and these equivalent deformations or substitutions are all included in the scope defined by the claims of this application.
Claims
1. An infrared heating oven for drying the electrode sheet, characterized in that Comprising: A box body, with a feed inlet and a discharge outlet respectively arranged on both sides, having a heating chamber inside, and the feed inlet and the discharge outlet are respectively used for the substrate to enter and exit the heating chamber; An infrared drying mechanism, including a plurality of heat insulation channels and infrared lamp tubes respectively arranged in the plurality of heat insulation channels. The plurality of heat insulation channels are horizontally arranged along the conveying direction of the pole piece. The length direction of the plurality of heat insulation channels is perpendicular to the conveying direction of the substrate. The plurality of heat insulation channels are evenly distributed on the upper and lower sides of the substrate. Both ends of the heat insulation channel respectively penetrate through both sides of the box body. One end of the heat insulation channel is connected with a fan assembly, and the fan assembly is used to introduce air into the heat insulation channel. A light-transmitting component is arranged on the side of the heat insulation channel close to the substrate, and the infrared light emitted by the infrared lamp tube irradiates the substrate through the light-transmitting component; A hot air drying mechanism, including two hot air assemblies located on the upper and lower sides of the substrate. The hot air assembly includes a hull and a plurality of air nozzles. The hull is arranged in the box body, and the plurality of air nozzles are sequentially arranged on the hull along the conveying direction of the pole piece. The air nozzles blow hot air on the substrate, and the air nozzles and the heat insulation channels are arranged alternately.
2. The infrared heating oven according to claim 1, characterized in that, The heat insulation channel includes an inner layer and an outer layer, and a heat insulation layer is formed between the inner layer and the outer layer.
3. An infrared heating oven according to claim 1, wherein, The infrared drying mechanism further includes a front door assembly and a rear door assembly; The front door assembly includes a front door body and a plurality of cover plates. The cover plates are provided with a plurality of air vents, the front door body is provided with a plurality of windows, and the plurality of cover plates respectively cover the plurality of windows. One end of each of the plurality of heat insulation channels is respectively communicated with the plurality of windows; The rear door assembly includes a wind hood, and the other ends of the plurality of heat insulation channels are all connected to the wind hood, and the wind hood is connected to the fan assembly.
4. An infrared heating oven according to claim 3, characterized in that, The fan assembly includes an air duct and a blower. One end of the air duct is communicated with the wind hood, and the other end of the air duct is communicated with the air outlet end of the blower.
5. An infrared heating oven according to claim 4, characterized in that, A filter is arranged at the air inlet end of the blower.
6. The infrared heating oven according to claim 3, characterized in that, A sealing strip is arranged between the front door body and the heat insulation channel.
7. An infrared heating oven according to claim 1, characterized in that, The infrared lamp tube is fixed on the heat insulation channel through a support assembly. The support assembly includes a long bracket and lamp tube brackets respectively arranged on both sides of the long bracket. The long bracket is connected to the side of the heat insulation channel away from the light-transmitting component, and the two lamp tube brackets are respectively used to fix both ends of the infrared lamp tube.
8. An infrared heating oven according to claim 7, wherein, A height adjustment bracket is arranged between the long bracket and the lamp tube bracket. The height adjustment bracket is provided with an installation long groove. The lamp tube bracket is fixed at one end of the height adjustment bracket, and the long bracket is connected in the installation long groove through bolts and nuts.
9. An infrared heating oven according to claim 1, characterized in that, The light-transmitting component includes an installation frame and glass installed on the installation frame. A stepped groove is arranged on the side of the heat insulation channel close to the substrate, and the installation frame is installed on the stepped groove through screws.
10. An infrared heating oven according to claim 9, characterized in that, The number of the glasses is two, the two glasses are arranged in parallel, and a spacer is arranged between the two glasses.