Drying oven and coating machine

Abstract

The utility model discloses a drying oven and a coating machine, the drying oven comprises a box body, the box body is internally provided with a containing cavity, the box body is provided with an inlet used for leading in a base material and an outlet used for leading out the base material, and the inlet and the outlet are respectively communicated with the containing cavity; the multiple ship bodies are arranged in the box body at intervals, the multiple ship bodies divide the containing cavity into multiple rows of heating spaces arranged in the first direction, and each ship body is provided with an air nozzle used for blowing hot air to the corresponding heating space; and the multiple guide rollers are arranged along the heating space at intervals, and each guide roller is used for conducting a base material. Under the condition that the size of the box body is not increased, the drying time of the base material in the box body is prolonged, and the baking efficiency is improved. Or on the premise of the same conduction speed, the length of the box body is shortened, the energy consumption is reduced, and the manufacturing cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of battery manufacturing, and more specifically, to an oven and a coating machine. Background Art

[0002] In the preparation process of lithium-ion batteries, slurry mixing and coating largely determine the final performance of the battery. In particular, coating is of great significance to the capacity, consistency, safety, etc. of the battery. At present, the existing drying oven has low drying efficiency, high energy loss, large floor space and high production cost. Utility Model Content

[0003] One purpose of the utility model is to provide a new technical solution for an oven and a coating machine, which can at least solve the problems of low drying efficiency, high energy loss, large oven footprint and high production cost in the prior art.

[0004] The utility model provides an oven, comprising: a box body, a containing cavity is arranged in the box body, an inlet for introducing a substrate and an outlet for exporting the substrate are arranged on the box body, the inlet and the outlet are respectively connected with the containing cavity; a plurality of hulls, the plurality of hulls are arranged in the box body at intervals, and the plurality of hulls divide the containing cavity into a plurality of rows of heating spaces arranged along a first direction, each of the hulls is respectively provided with a wind nozzle for blowing hot air into the heating space; a plurality of guide rollers, the plurality of guide rollers are arranged at intervals along the heating space, and each of the guide rollers is respectively used for conducting the substrate.

[0005] Optionally, among the multiple rows of heating spaces, at least one row of the heating spaces is a temperature-controlled heating space, and the temperature-controlled heating space is not directly connected to the inlet or the outlet along the substrate conduction direction, and a plurality of temperature-controllable heat radiators are provided on the hull located on at least one side of the temperature-controlled heating space for adjusting the temperature of the temperature-controlled heating space.

[0006] Optionally, the plurality of wind nozzles located on one side of the same hull are spaced apart from each other, and the wind nozzles or heat radiators arranged opposite to each other on the hulls located on both sides of the same heating space are staggered along the conduction direction of the substrate.

[0007] Optionally, the box body is provided with multiple air inlets and multiple air outlets, one end of each air inlet is connected to the wind nozzles on each row of the hull, and the other end is connected to the heating device, one end of each air outlet is connected to each heating space, and the other end is connected to the exhaust damper.

[0008] Optionally, the oven further comprises: a circulation fan and a fresh air damper, wherein one end of the circulation fan is connected to the heating device, and the other end is respectively connected to the fresh air damper and each of the air outlets to control the hot air circulation in the oven.

[0009] Optionally, the first direction is the height direction, there are three hulls, which are respectively a first row of hulls, a second row of hulls and a third row of hulls, the first row of hulls, the second row of hulls and the third row of hulls divide the accommodating cavity into three heating spaces, which are respectively a first heating space, a second heating space and a third heating space.

[0010] Optionally, a plurality of guide rollers are provided in the first heating space between the first row of hulls and the second row of hulls, a plurality of guide rollers are provided in the second heating space between the second row of hulls and the third row of hulls, and a plurality of guide rollers are provided in the third heating space between the third row of hulls and the bottom of the box.

[0011] Optionally, the side of the first row of hulls facing the second row of hulls is provided with a plurality of the wind nozzles arranged at intervals, the side of the second row of hulls facing the first row of hulls and the side facing the third row of hulls are respectively provided with a plurality of the wind nozzles arranged at intervals, and the side of the third row of hulls facing the second row of hulls and the side facing the bottom of the box are respectively provided with a plurality of the wind nozzles arranged at intervals.

[0012] Optionally, a side of the second row of hulls facing the third row of hulls and a side of the third row of hulls facing the second row of hulls are respectively provided with temperature-controllable heat radiators to adjust the temperature in the second heating space.

[0013] Optionally, the first row of hulls, the second row of hulls and the third row of hulls are respectively provided with temperature sensors and humidity sensors.

[0014] A second aspect of the utility model provides a coating machine, comprising the oven described in the above embodiment.

[0015] The oven of the utility model is provided with a plurality of hulls in the box body, and the accommodating cavity in the box body is divided into a plurality of heating spaces arranged along a first direction by the plurality of hulls, and the air nozzles on the hulls are used to blow hot air toward the heating spaces, so that the substrate is cyclically dried during the conduction process in the heating spaces, thereby increasing the drying time of the substrate in the box body without increasing the volume of the box body, and improving the baking efficiency. Alternatively, under the premise of the same conduction speed, the length of the box body is shortened, the energy consumption is reduced, and the manufacturing cost is reduced.

[0016] Other features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the present invention and, together with the description, serve to explain the principles of the present invention.

[0018] Figure 1 It is a structural schematic diagram of an oven according to an embodiment of the utility model.

[0019] Reference numerals:

[0020] Box body 10; accommodating chamber 11; inlet 12; outlet 13; air inlet 14; air outlet 15;

[0021] The first row of hulls 21; the second row of hulls 22; the third row of hulls 23;

[0022] Wind nozzle 30;

[0023] Guide roller 40;

[0024] A first heating space 51; a second heating space 52; a third heating space 53;

[0025] Heat radiator 60;

[0026] Heating device 71; circulating fan 72; fresh air damper 73; exhaust air damper 74. DETAILED DESCRIPTION

[0027] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention.

[0028] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present invention, its application, or uses.

[0029] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered as part of the specification.

[0030] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0031] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0032] In the specification and claims of the utility model, if the term "first" or "second" is involved, it may explicitly or implicitly include one or more of the features. In the description of the utility model, unless otherwise specified, "multiple" means two or more. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / " generally means that the related objects are in an "or" relationship.

[0033] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate 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 present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0034] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" involved 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 it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0035] The oven according to the embodiment of the utility model is described in detail below with reference to the accompanying drawings.

[0036] like Figure 1 As shown, the oven according to the present invention includes a box body 10 , a plurality of hulls and a plurality of guide rollers 40 .

[0037] Specifically, a housing 10 is provided with a housing chamber 11, and an inlet 12 for introducing a substrate and an outlet 13 for exporting the substrate are provided on the housing 10, and the inlet 12 and the outlet 13 are respectively communicated with the housing chamber 11. A plurality of hulls are arranged in the housing 10 at intervals, and the housing chamber 11 is divided into a plurality of rows of heating spaces arranged along a first direction by the plurality of hulls, and each hull is provided with a nozzle 30 for blowing hot air into the heating space; a plurality of guide rollers 40 are arranged at intervals along the heating space, and each guide roller 40 is used to conduct the substrate.

[0038] In other words, if Figure 1 As shown, the oven according to the utility model is mainly composed of a box body 10, a plurality of hulls and a plurality of guide rollers. Among them, a receiving cavity 11 is arranged in the box body 10, and an inlet 12 for introducing a substrate and an outlet 13 for exporting the substrate are arranged on the box body 10, and the inlet 12 and the outlet 13 are respectively connected to the receiving cavity 11. In the utility model, the substrate can be a material such as an electrode sheet or a diaphragm. The substrate can be introduced into the box body 10 through the inlet 12, and after drying, it can be exported from the box body 10 through the outlet 13 to enter the next process.

[0039] like Figure 1 As shown, multiple hulls are arranged in the box 10 at intervals, and the multiple hulls can divide the accommodating cavity 11 into multiple rows of heating spaces arranged along the first direction. Among them, the multiple hulls include two or more hulls, and the multiple rows of heating spaces include two or more rows of heating spaces. The first direction can be understood as any direction along the height direction or horizontal direction of the box 10. A wind nozzle 30 is respectively provided on each hull, and the wind nozzle 30 can be used to blow hot air into the corresponding heating space, thereby achieving drying of the substrate. Multiple guide rollers 40 can be arranged at intervals along the heating space, and each guide roller 40 is used to conduct the substrate. The substrate is introduced into and exported from the box through the guide rollers 40. Multiple hulls divide the accommodating cavity 11 into multiple rows of heating spaces arranged along the first direction. The first direction can also be understood as any direction along the height direction or horizontal direction of the box 10, so that the substrate can be folded back and forth in the box 10, and the substrate can be circulated and dried during the substrate conduction process.

[0040] The utility model arranges guide rollers 40 in the heating space, so that the substrate is folded and moved back and forth in the box body 10 under the conduction of the guide rollers 40, thereby improving the drying efficiency of the oven and reducing the space occupied by the oven. Alternatively, under the premise of the same conduction speed, the length of the box body 10 is shortened, energy consumption is reduced, and manufacturing costs are reduced.

[0041] According to one embodiment of the utility model, at least one row of heating spaces among the multiple rows of heating spaces can be configured as a temperature-controlled heating space (see Figure 1The second heating space 52 is provided in the temperature-controlled heating space, and the temperature-controlled heating space is not directly connected to the inlet 12 or the outlet 13 on the box body along the substrate conduction direction. A plurality of temperature-controlled heat radiators 60 can be provided on the hull located on at least one side of the temperature-controlled heating space. The temperature of the temperature-controlled heating space can be effectively adjusted by the temperature-controlled heat radiators 60.

[0042] See also Figure 1 In the present invention, taking the substrate as an example, in order to further improve the drying efficiency and drying quality of the electrode, if only hot air drying is used, in addition to the problem of electrode cracking caused by the floating of the adhesive due to the temperature being immutable, the surface drying rate of the electrode is higher than the drying rate inside the electrode, resulting in orange peel and hard skin on the surface of the electrode. A temperature-controllable thermal radiator 60 is used, the illumination power and radiation temperature are adjustable, and the thermal radiation (such as infrared light) has the ability to penetrate the electrode slurry, and the water has a strong absorption of infrared light in a special band, so the inside of the electrode can be dried efficiently, the drying rate is faster, and the problems of floating of the adhesive and hard skin on the surface are avoided, and the drying efficiency and drying quality of the electrode are further improved.

[0043] The setting of the temperature-controlled heating space divides the heating stage of the electrode entering the oven into a hot air drying stage and a temperature-controlled drying stage. At the same time, since the temperature in the temperature-controlled drying stage is usually higher and the temperature difference with the outside of the oven is larger, the setting of the temperature-controlled heating space not being directly connected to the inlet 12 or outlet 13 on the box body 10 along the substrate conduction direction can avoid cracking or shrinkage of the electrode caused by directly introducing the electrode from outside the box body 10 into the temperature-controlled drying stage with a higher temperature or directly leading out of the box body 10 after the temperature-controlled drying stage, thereby affecting the quality of the electrode.

[0044] According to one embodiment of the present invention, see Figure 1 , multiple air nozzles 30 located on one side of the same hull are spaced apart from each other, and the air nozzles 30 or heat radiators 60 arranged oppositely on the hulls on both sides of the same heating space can be staggered along the conduction direction of the substrate. In order to avoid the dense heat radiators 60 or air nozzles 30 causing the pole piece to heat too quickly, the utility model adopts an arrangement method in which multiple air nozzles 30 located on one side of the same hull are spaced apart from each other, and the air nozzles 30 or heat radiators 60 arranged oppositely on the hulls on both sides of the same heating space can be staggered along the conduction direction of the substrate.

[0045] The utility model oven adopts a combination of hot air and infrared to solve the problems of low drying efficiency, high energy loss, large floor space and high production cost of hot air oven. At the same time, it also solves the problem that the baking intensity cannot be adjusted in a single-section oven. The utility model oven improves the drying efficiency by more than 2 times, reduces the energy loss by more than 20%, and can avoid cracking of the pole piece while ensuring the above advantages, ensuring that different process requirements are met.

[0046] In the present invention, the heat radiator 60 can be an infrared radiator. The infrared radiator can be a ceramic infrared radiator, the heating distance is set at 100-300mm, and the radiator temperature is set at 200-400℃. The present invention can be specifically adjusted according to the pole piece running speed and the distance between the heat radiator 60 and the pole piece. Of course, the present invention can also use a laser dryer instead of the heat radiator 60, which will not be described in detail in the present invention.

[0047] According to one embodiment of the utility model, Figure 1 As shown, the box 10 is provided with a plurality of air inlets 14 and a plurality of air outlets 15, one end of each air inlet 14 is connected to the air nozzle 30 on each row of hulls, the other end of each air inlet 14 is connected to the heating device 71, one end of each air outlet 15 is connected to each heating space, and the other end of each air outlet 15 is connected to the exhaust damper 74. The heat generated by the heating device 71 is introduced into the box 10 through the air inlet 14 and the air nozzle for drying the substrate. At the same time, the steam in the box 10 is discharged from the box through the air outlet 15 and the exhaust damper 74, so that the substrate in the box 10 is effectively dried.

[0048] According to one embodiment of the present invention, see Figure 1 The oven also includes: a circulating fan 72 and a fresh air damper 73, wherein one end of the circulating fan 72 is connected to the heating device 71, and the other end of the circulating fan 72 is respectively connected to the fresh air damper 73 and each air outlet 15. The circulating fan 72 can control the hot air circulation in the oven to achieve circulating drying of the substrate in the box body 10, thereby improving the drying efficiency of the oven.

[0049] See also Figure 1 The drying principle of the oven of the utility model is that one end of the air inlet 14 is connected to the circulating fan 72 through the heating device 71, and the other end is connected to the wind nozzle on the hull in the box body 10. The heating device 71 can heat the gas blown out by the circulating fan 72, so the wind nozzle blows out the hot air flow to heat the electrode and dry the moisture. One end of the air outlet 15 is directly connected to the accommodating cavity in the box body 10, and the other end is respectively connected to the exhaust damper 74 and the circulating fan 72. According to the temperature, pressure and other conditions in the oven, the exhaust damper 74 can be controlled to be opened or closed to control the hot air circulation in the oven. In addition, the circulating fan 72 is also connected to the fresh air damper 73. When the exhaust damper 74 is opened and part of the gas in the oven is discharged, the fresh air damper 73 controls the new gas to enter the circulating fan 72, and enters the oven after being heated by the heating package, thereby realizing the effective drying of the substrate.

[0050] According to one embodiment of the present invention, see Figure 1, the first direction may be the height direction, the hulls may be set to three, the three hulls are arranged in the height direction in the box 10, and the three hulls are respectively the first row of hulls 21, the second row of hulls 22 and the third row of hulls 23 from top to bottom, the first row of hulls 21, the second row of hulls 22 and the third row of hulls 23 divide the accommodating cavity into three heating spaces, and the three heating spaces are respectively the first heating space 51, the second heating space 52 and the third heating space 53. The pole piece is dried in the first heating space 51, the second heating space 52 and the third heating space 53 in a cycle, and the drying time of the pole piece in the box 10 can be increased without increasing the volume of the box 10, thereby improving the baking efficiency. Or, under the premise of the same conduction speed, the length of the box 10 can be shortened, energy consumption can be reduced, and the manufacturing cost can be reduced.

[0051] According to an embodiment of the utility model, a plurality of guide rollers 40 are arranged in the first heating space 51 between the first row of hulls 21 and the second row of hulls 22, and the substrate enters the first heating space 51 through the plurality of guide rollers 40 for drying. A plurality of guide rollers 40 are arranged in the second heating space 52 between the second row of hulls 22 and the third row of hulls 23. The substrate after drying in the first heating space 51 enters the second heating space 52 for further drying under the action of the plurality of guide rollers 40. A plurality of guide rollers 40 are arranged in the third heating space 53 between the third row of hulls 23 and the bottom of the box 10. The substrate after drying in the second heating space 52 continues to enter the third heating space 53 for drying under the action of the guide rollers 40, thereby realizing that the substrate (electrode piece) goes back and forth in the box 10 for multiple times, thereby increasing the drying time of the electrode piece in the box 10 without increasing the volume of the box 10, and improving the baking efficiency. Or, under the premise of the same conduction speed, the length of the box 10 is shortened, energy consumption is reduced, and manufacturing cost is reduced. Of course, the specific number of guide rollers can be set according to actual needs, and will not be described in detail in the present invention.

[0052] According to one embodiment of the present invention, see Figure 1 , a plurality of spaced-apart air nozzles 30 are provided on the side of the first row of hulls 21 facing the second row of hulls 22. A plurality of spaced-apart air nozzles 30 are provided on the side of the second row of hulls 22 facing the first row of hulls 21 and on the side facing the third row of hulls 23. A plurality of spaced-apart air nozzles 30 are provided on the side of the third row of hulls 23 facing the second row of hulls 22 and on the side facing the bottom of the box 10.

[0053] like Figure 1As shown, a plurality of air nozzles 30 arranged at intervals are provided on the side of the first row of hulls 21 facing the second row of hulls 22. The air nozzles 30 on the first row of hulls 21 blow hot air toward the pole pieces. A plurality of air nozzles 30 are provided on the side of the second row of hulls 22 facing the first row of hulls 21, and a plurality of air nozzles 30 are provided on the side of the second row of hulls 22 facing the third row of hulls 23, so as to ensure that the pole pieces can be dried with hot air through the air nozzles 30 during the process of being conducted to the opposite sides of the second row of hulls 22. A plurality of air nozzles 30 are provided on the side of the third row of hulls 23 facing the second row of hulls 22 and on the side facing the bottom of the box body 10, so as to ensure that the pole pieces can be dried with hot air through the air nozzles 30 during the process of being conducted to the opposite sides of the third row of hulls 23.

[0054] See also Figure 1 In the utility model, a hot air drying system is formed between the first row of hulls 21, the second row of hulls 22 and the third row of hulls 23, a plurality of air inlets 14, a plurality of air outlets 15 and a plurality of air nozzles 30. The number of air nozzles 30 in each row can be 6, and each air nozzle 30 is vertically downward or upward toward the pole piece and parallel to each other. Among them, the first row of hulls 21 is provided with a row of downward air nozzles 30, and the hot air blown downward by the air nozzles 30 is directed toward the pole piece. The second row of hulls 22 is provided with a row of upward air nozzles 30 and a row of downward air nozzles 30 that blow hot air upward and blow hot air downward, respectively. The third row of hulls 23 is also provided with a row of upward air nozzles 30 and a row of downward air nozzles 30 that blow hot air upward and blow hot air downward, respectively. The wind nozzles 30 on both sides of the first row of hulls 21 and the second row of hulls 22 are staggered along the pole conduction direction, the wind nozzles 30 on both sides of the second row of hulls 22 and the third row of hulls 23 are staggered along the pole conduction direction, and the wind nozzles 30 on both sides of the third row of hulls 23 are staggered along the pole conduction direction, ensuring that different areas in the box 10 are dried with hot air, thereby improving drying efficiency.

[0055] According to one embodiment of the present invention, see Figure 1, the side of the second row of hulls 22 facing the third row of hulls 23 and the side of the third row of hulls 23 facing the second row of hulls 22 are respectively provided with temperature-controllable heat radiators 60, which effectively adjust the temperature in the second heating space 52. In the present utility model, in order to further improve the drying efficiency and drying quality of the pole piece, if only the hot air drying method is adopted, in addition to the problem of the pole piece cracking caused by the floating of the adhesive due to the temperature being immutable, it will also cause the pole piece surface drying rate to be higher than the pole piece internal drying rate, resulting in orange peel, hard skin and other problems on the pole piece surface. With the heat radiator 60, the light power and radiation temperature are adjustable, and the infrared light has the ability to penetrate the pole piece slurry, and the water has a strong absorption of the infrared light of the special band, so the inside of the pole piece can be dried efficiently, the drying rate is fast, and the problems of the floating of the adhesive and the hard skin on the surface are avoided, and the drying efficiency and drying quality of the pole piece are further improved.

[0056] In this utility model, see Figure 1 , the heat radiators 60 on the second row of hulls 22 and the third row of hulls 23 are staggered. In order to avoid the pole piece being heated too quickly due to the dense heat radiators 60, the utility model adopts an alternating arrangement of the upper and lower heat radiators 60, and two heat radiators 60 are arranged between each row of air nozzles 30 on the opposite sides of the second row of hulls 22 and the third row of hulls 23, and the upper and lower heat radiators 60 are staggered in the height direction.

[0057] The oven of the utility model adopts a folding oven structure and a combination of hot air and infrared, which solves the problems of low drying efficiency, high energy loss, large floor space and high production cost of hot air ovens. At the same time, it also solves the problem that the baking intensity cannot be adjusted in a single section of a folding oven. The oven of the utility model improves the drying efficiency by more than 2 times, reduces the energy loss by more than 20%, and can avoid cracking of the pole piece while ensuring the above advantages, ensuring that different process requirements are met.

[0058] In the present invention, the heat radiator 60 can be an infrared radiator. The infrared radiator can be a ceramic infrared radiator, the heating distance is set at 100-300mm, and the radiator temperature is set at 200-400℃. The present invention can be specifically adjusted according to the pole piece running speed and the distance between the radiator and the pole piece. Of course, the present invention can also use a laser dryer instead of the heat radiator 60, which will not be described in detail in the present invention.

[0059] According to an embodiment of the utility model, the first row of hulls 21, the second row of hulls 22 and the third row of hulls 23 are respectively provided with temperature sensors and humidity sensors. By providing the temperature sensors and humidity sensors, the surface temperature of the pole pieces is detected by the temperature sensors to prevent the pole pieces from cracking due to excessively high temperature or poor drying effect due to excessively low temperature. The humidity of the gas in the oven is detected by the humidity sensor, and the exhaust fan is used to ensure that the steam in the oven is stable within a certain range.

[0060] The oven of the utility model, see Figure 1 The heating stage in the box 10 can be divided into three stages: the first stage is the hot air drying stage, in which the temperature is relatively low to prevent the defects caused by too fast drying of the newly coated electrode at high temperature. The second stage is the hot air and infrared radiation synergistic drying stage, in which the temperature is high, the PVDF has high crystallinity, and exhibits good adhesion, which has a positive effect on the battery cycle performance. The third stage is the hot air drying stage again, in which the temperature is lowered, which is basically the same as the temperature of the first stage, to avoid the electrode shrinkage caused by the sudden cold after the electrode leaves the oven due to the excessively high temperature, resulting in coating defects.

[0061] The oven according to the embodiment of the utility model is a variable temperature folding oven that uses hot air drying and infrared drying. Through the oven, the variable temperature drying and curing of the slurry coated on the electrode is completed. Specifically, the process includes the following steps:

[0062] 1. Unwinding and tension adjustment of the base copper foil. After the copper foil is unwound by the unwinding mechanism, the tension is adjusted by the tension roller. After the tension of the copper foil is stabilized, coating is performed;

[0063] 2. The first hot air drying of the electrode: After passing through the coating die head, the electrode directly enters the folding oven and enters the first heating space 51. The air nozzles on both sides of the first heating space 51 blow out hot air with a temperature of 60°C. At this time, the front and back sides of the electrode are heated and dried, and the coating is dried from a fluid state to a semi-fluid state. This stage is the first hot air drying stage;

[0064] 3. Second hot air and infrared radiation synergistic drying of the pole piece: After the first hot air drying stage, the pole piece enters the second heating space 52 through the guide roller 40. The air nozzles 30 and the heat radiators 60 on both sides of the second heating space 52 synergistically dry the pole piece. This stage is the hot air and infrared radiation synergistic drying stage, and the hot air system has the same parameter settings as step 2. The infrared radiator is 100 mm away from the pole piece, and the radiator temperature is set to 300°C.

[0065] 3. The third hot air drying of the electrode: After the electrode is dried by hot air and infrared radiation, it enters the third heating space 53 through the guide roller 40. At this stage, since the electrode has been basically dried, and in order to further reduce the temperature difference with the outside, the electrode is dried only through the downward wind nozzles 30 on the third row of hulls 23. After drying, it is led out of the oven through the guide roller 40 and directly enters the next stage.

[0066] The oven of the utility model heats the pole piece by hot air and infrared radiation to evaporate the water, and the saturated steam can be taken away by fresh air. In addition, the temperature sensor and the humidity sensor are respectively provided on the first row of hulls 21, the second row of hulls 22 and the third row of hulls 23. The temperature sensor is used to detect the surface temperature of the pole piece to prevent the pole piece from cracking due to excessively high temperature or poor drying effect due to excessively low temperature. The humidity sensor detects the humidity of the gas in the oven, and ensures that the steam in the oven is stable within a certain range through the circulating fan 72.

[0067] In summary, the oven of the utility model adopts a combination of hot air and infrared to solve the problems of low drying efficiency, high energy loss, large floor space and high production cost of hot air ovens. At the same time, it also solves the problem that the baking intensity cannot be adjusted in a single-section oven. The oven of the utility model improves the drying efficiency by more than 2 times, reduces the energy loss by more than 20%, and can avoid cracking of the pole piece while ensuring the above advantages, ensuring that different process requirements are met.

[0068] Of course, for those skilled in the art, other structures and working principles of the oven are understandable and achievable, and will not be described in detail in the present invention.

[0069] According to the second aspect of the utility model, a coating machine is provided, including the oven in the above-mentioned embodiment. Since the oven in the embodiment of the utility model has the above-mentioned technical effects, the coating machine in the embodiment of the utility model should also have the corresponding technical effects, that is, the coating agent of the utility model solves the problems of low drying efficiency, high energy loss, large floor space and high production cost of the hot air oven by adopting the oven in the above-mentioned embodiment. At the same time, it also solves the problem that the baking intensity cannot be adjusted in a single-section oven. The coating machine of the utility model improves the drying efficiency by more than 2 times, reduces the energy loss by more than 20%, and can avoid cracking of the pole piece under the premise of ensuring the above-mentioned advantages, ensuring that different process requirements are met.

[0070] Of course, for those skilled in the art, other structures and working principles of the coating machine are understandable and achievable, and will not be described in detail in the present utility model.

[0071] Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present invention. It should be understood by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. An oven, characterized in that: include: A box body, wherein a receiving cavity is provided in the box body, and an inlet for introducing a substrate and an outlet for exporting the substrate are provided on the box body, and the inlet and the outlet are respectively communicated with the receiving cavity; A plurality of hulls, wherein the plurality of hulls are arranged in the box body at intervals, and the plurality of hulls divide the accommodating cavity into a plurality of rows of heating spaces arranged along a first direction, and each of the hulls is provided with a nozzle for blowing hot air into the heating space; A plurality of guide rollers are arranged at intervals along the heating space, and each of the guide rollers is used for conducting the substrate.

2. The oven according to claim 1, characterized in that Among the multiple rows of heating spaces, at least one row of the heating spaces is a temperature-controlled heating space, and the temperature-controlled heating space is not directly connected to the inlet or the outlet along the substrate conduction direction. The hull located on at least one side of the temperature-controlled heating space is provided with multiple temperature-controllable heat radiators for adjusting the temperature of the temperature-controlled heating space.

3. The oven according to claim 2, characterized in that The plurality of air nozzles located on one side of the same hull are spaced apart from each other, and the air nozzles or heat radiators arranged opposite to each other on the hulls located on both sides of the same heating space are staggered along the conduction direction of the substrate.

4. The oven according to claim 1, characterized in that The box body is provided with multiple air inlets and multiple air outlets, one end of each air inlet is connected to the wind nozzles on each row of the hull, and the other end is connected to the heating device, one end of each air outlet is connected to each heating space, and the other end is connected to the exhaust damper.

5. The oven according to claim 4, characterized in that Also includes: A circulation fan and a fresh air damper, wherein one end of the circulation fan is connected to the heating device, and the other end is respectively connected to the fresh air damper and each of the air outlets to control the hot air circulation in the oven.

6. The oven according to claim 1, characterized in that The first direction is the height direction, there are three hulls, which are respectively a first row of hulls, a second row of hulls and a third row of hulls, the first row of hulls, the second row of hulls and the third row of hulls divide the accommodating cavity into three heating spaces, which are respectively a first heating space, a second heating space and a third heating space.

7. The oven according to claim 6, characterized in that A plurality of guide rollers are provided in the first heating space between the first row of hulls and the second row of hulls, a plurality of guide rollers are provided in the second heating space between the second row of hulls and the third row of hulls, and a plurality of guide rollers are provided in the third heating space between the third row of hulls and the bottom of the box.

8. The oven according to claim 6, characterized in that The side of the first row of hulls facing the second row of hulls is provided with a plurality of spaced-apart wind nozzles, the side of the second row of hulls facing the first row of hulls and the side facing the third row of hulls are respectively provided with a plurality of spaced-apart wind nozzles, and the side of the third row of hulls facing the second row of hulls and the side facing the bottom of the box are respectively provided with a plurality of spaced-apart wind nozzles.

9. The oven according to claim 6, characterized in that A side of the second row of hulls facing the third row of hulls and a side of the third row of hulls facing the second row of hulls are respectively provided with temperature-controllable heat radiators to adjust the temperature in the second heating space.

10. The oven according to claim 6, characterized in that The first row of hulls, the second row of hulls and the third row of hulls are respectively provided with temperature sensors and humidity sensors.

11. A coating machine, characterized in that: The invention comprises the oven according to any one of claims 1 to 10.

Images