Double-layer turn-back type drying oven

Abstract

The invention relates to the technical field of battery cell production equipment, in particular to a double-layer turn-back type drying oven. The drying oven comprises a first drying oven layer which is provided with a first drying channel and is used for drying a pole piece for the first time; the second drying oven layer is provided with a second drying channel and is used for drying the pole piece for the second time; the second oven layer and the first oven layer are stacked in the height direction; the rotary assembly is arranged between an outlet of the first drying channel and an inlet of the second drying channel and is used for turning over and rotating the pole piece; and the wrap angle adjusting assembly is arranged at the inlet of the first drying channel and / or the outlet of the second drying channel and used for conducting wrap angle increasing adjustment on the pole pieces on the wrap angle adjusting assembly. According to the double-layer turn-back type drying oven, the overall occupied area of the drying oven can be greatly reduced under the condition that the pole piece tape walking stability is improved. Meanwhile, the length of the equipment is reduced, so that the oven is convenient to maintain, and the use cost of the oven is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of battery cell production equipment, and in particular to a double-layer folding oven. Background Art

[0002] In the process of producing pole pieces, the foil needs to be coated with slurry on both sides, and the coated foil needs to be dried in an oven to obtain the pole piece.

[0003] In order to ensure the drying effect of the electrode, it is generally necessary to set up a long oven to dry the slurry on the foil, which leads to the problem of a large floor space of the oven, taking up a large amount of plant space, which is not conducive to equipment maintenance. In addition, the oven also needs to consider the docking with upstream and downstream equipment. It is necessary to set up a long roller group at the entrance and exit of the oven to ensure that the fluctuation can be kept low during the transmission of the electrode. Therefore, it will further reduce the space utilization of the plant and increase the cost of equipment use. At the same time, too long a belt running distance will also make it more likely that the electrode will deviate or wrinkle, and other unstable situations will occur, affecting the quality of the finished electrode. Summary of the invention

[0004] In order to solve the above problems, the present application proposes a double-layer folding oven, which can improve the space utilization rate of the equipment.

[0005] The present application discloses a double-layer folding oven, the oven comprising: The first oven layer is provided with a first drying channel for drying the electrode for the first time; The second oven layer is provided with a second drying channel for performing a second drying on the electrode sheet; the second oven layer is stacked with the first oven layer in the height direction; A rotating assembly, disposed between the outlet of the first drying channel and the inlet of the second drying channel, for turning over and rotating the electrode piece; and The wrap angle adjustment component is arranged at the entrance of the first drying channel and / or the exit of the second drying channel, and is used to increase the wrap angle of the pole piece on the wrap angle adjustment component.

[0006] In one embodiment, the wrap angle adjustment assembly includes a first roller and a plurality of air outlet members disposed on the opposite side of the first roller, and the air outlets of the air outlet members are disposed on a side close to the first roller and facing the first roller.

[0007] In one embodiment, the air outlet members include at least two, and the air outlet members are arranged around the first roller.

[0008] In one embodiment, the wrap angle adjustment components include at least two groups, and the at least two groups of wrap angle adjustment components are arranged along the tape running direction.

[0009] In one embodiment, the wrap angle adjustment assembly is configured to also be used to perform tension isolation on the pole piece running on the wrap angle adjustment assembly.

[0010] In one embodiment, the distance between the air outlet member and the first roller is 50 mm-500 mm, and the wind pressure of the air outlet member is 1 kPa-30 kPa.

[0011] In one embodiment, the rotary assembly includes a tension adjustment assembly, and the tension adjustment assembly is used to adjust the tension of the pole piece running on the rotary assembly.

[0012] In one embodiment, the tension adjustment assembly includes at least one active roller and at least two second rollers; The second rollers are respectively located at the exit of the first drying channel and the entrance of the second drying channel, and a tension sensor is provided on the second roller; the tension sensor is associated with the active roller to adjust the tension of the pole piece.

[0013] In one embodiment, the active roller is a contact type active roller or a suspension type active roller.

[0014] In one embodiment, the oven further comprises a circulating wind box, wherein the circulating wind box is provided with a first wind chamber and a second wind chamber; The air supply port of the first air chamber is connected to one end of the inlet of the first oven layer, and the air return port of the first air chamber is connected to one end of the outlet of the first oven layer; The air supply port of the second air chamber is connected to one end of the inlet of the second oven layer, and the air return port of the second air chamber is connected to one end of the outlet of the second oven layer.

[0015] In one embodiment, the circulation air box further includes a return air duct; The return air duct is arranged through the middle of the first air chamber and the second air chamber, and the return air duct is communicated with the return air port of the first air chamber and the return air port of the second air chamber.

[0016] In one embodiment, the oven is provided with at least one set of rollers and at least two sets of air nozzles; The nozzle group includes a first nozzle group arranged on the first oven layer and a second nozzle group arranged on the second oven layer; The roller group includes a plurality of rollers arranged at intervals along the same plane, and the roller group is arranged between the first nozzle group and the second nozzle group; The pole piece is carried along the upper and lower sides of the roller group, and the air nozzle groups are arranged toward the roller group to blow and dry the side of the pole piece facing the air nozzle group.

[0017] In one embodiment, the roller group includes a separate group, and an isolation structure for isolating the first oven layer and the second oven layer is provided between the rollers in the roller group; The roller group is configured so that both opposite sides are used for supporting the pole pieces.

[0018] In one embodiment, the roller group includes two groups, and an isolation structure for isolating the first oven layer and the second oven layer is provided between the two groups of roller groups; The two groups of roller groups support the pole pieces of the first oven layer and the pole pieces of the second oven layer respectively.

[0019] The double-layer folding oven of the present application can not only make full use of the vertical space of the oven, but also shorten the tape running distance, reduce the length of the continuous tape running of the pole piece, thereby reducing the fluctuation of the pole piece during the transmission process, and greatly reducing the overall occupied area of ​​the oven while improving the tape running stability of the pole piece. At the same time, the reduction in equipment length can also facilitate the maintenance of the oven and reduce the cost of using the oven. BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 A schematic diagram of the structural module of a double-layer folding oven provided in an embodiment of the present application.

[0021] Figure 2 A schematic structural diagram of the main part of the double-layer folding oven provided in an embodiment of the present application.

[0022] Figure 3 A schematic diagram of the structure of the angle adjustment assembly provided in an embodiment of the present application.

[0023] Figure 4 Another structural schematic diagram of the angle adjustment assembly provided in an embodiment of the present application.

[0024] Figure 5 This is a first structural schematic diagram of the rotary assembly provided in an embodiment of the present application.

[0025] Figure 6 A second structural schematic diagram of the rotary assembly provided in an embodiment of the present application.

[0026] Figure 7 This is a third structural schematic diagram of the rotary assembly provided in an embodiment of the present application.

[0027] Figure 8 This is a fourth structural schematic diagram of the rotary assembly provided in an embodiment of the present application.

[0028] Fig. 9 Another structural schematic diagram of the oven main body of the double-layer folding oven provided in an embodiment of the present application.

[0029] Fig.10 A schematic diagram of the structure of the circulating bellows provided in an embodiment of the present application.

[0030] Fig.11 Another schematic diagram of the structure of the circulating bellows provided in an embodiment of the present application.

[0031] Fig.12 This is a schematic diagram of the overall structure of a double-layer folding oven provided in an embodiment of the present application.

[0032] Fig.13 A schematic diagram of the airflow direction in the air duct of a double-layer folding oven provided in an embodiment of the present application.

[0033] Fig.14 A schematic diagram of the airflow direction of another air duct of the double-layer folding oven provided in an embodiment of the present application.

[0034] Reference numerals: 1. First oven layer; 11. First drying channel; 12. First air supply chamber; 13. First air return chamber; 2. Second oven layer; 21. Second drying channel; 22. Second air supply chamber; 23. Second air return chamber; 3. Rotating assembly; 31. Active roller; 32. Second roller; 4. Wrap angle adjustment component; 41. Air outlet member; 42. First roller; 5. Pole piece; 6. Isolation structure; 7. Air nozzle; 8. Roller; 9. Circulation bellows; 91. First air chamber; 911. Air supply outlet of first air chamber; 912. Return air outlet of first air chamber; 92. Second air chamber; 921. Air supply outlet of second air chamber; 922. Return air outlet of second air chamber; 93. First fan; 94. Second fan; 95. Return air duct. DETAILED DESCRIPTION It should be noted that, in the absence of conflict, the embodiments and technical features in the embodiments of the present application can be combined with each other, and the detailed description in the specific implementation method should be understood as an explanation of the purpose of the present application and should not be regarded as an improper limitation on the present application.

[0036] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the specific technical solution of the present application will be further described in detail below in conjunction with the drawings in the embodiments of the present application. The following embodiments are used to illustrate the present application, but are not used to limit the scope of the present application.

[0037] In the embodiments of the present application, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present application, unless otherwise specified, "multiple" means two or more.

[0038] In addition, in the embodiments of the present application, directional terms such as "up", "down", "left" and "right" are defined relative to the orientation of the components in the drawings. It should be understood that these directional terms are relative concepts. They are used for relative description and clarification, and they may change accordingly according to the changes in the orientation of the components in the drawings.

[0039] In the embodiments of the present application, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium.

[0040] In the present application, the terms "include", "comprises" or any other variants thereof are intended to cover non-exclusive inclusion. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0041] In the embodiments of the present application, the words "exemplary" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present the related in a specific way.

[0042] like Figure 1 As shown, the present application discloses a double-layer folding oven, which includes a first oven layer 1, a second oven layer 2, a rotating component 3 and an angle adjustment component 4.

[0043] The first oven layer 1 is provided with a first drying channel 11 for performing a second drying on the electrode piece 5, and the second oven layer 2 is provided with a second drying channel 21 for performing a second drying on the electrode piece 5. In addition, the second oven layer 2 is stacked with the first oven layer 1 in the height direction. Providing the first oven layer 1 and the second oven layer 2 can utilize the space in the longitudinal direction of the oven and reduce the area occupied.

[0044] Please combine Figure 2Specifically, the oven may include a roller 8 and a tuyere 7 arranged opposite to the roller 8, and the roller 8 may cooperate with other isolation structures 6 to relatively isolate the first oven layer 1 from the second oven layer 2. The pole piece 5 may enter the first drying channel 11 from the entrance of the first oven layer 1, and at this time, the wet surface of the pole piece 5 faces the outlet of the tuyere 7, and the tuyere 7 blows air to the pole piece 5 and makes it close to the roller 8, and the roller 8 drives the pole piece 5 to move along the first oven layer 1 toward its outlet, and dries the pole piece 5 during the movement of the pole piece 5.

[0045] When the pole piece 5 moves to the exit of the first oven layer 1, the pole piece 5 will be turned over and rotated by the rotation of the rotary assembly 3, and enter the second oven layer 2 from the entrance of the second oven layer 2, so as to perform secondary drying on the pole piece 5. The rotary assembly 3 is arranged between the exit of the first drying channel 11 and the entrance of the second drying channel 21, and is used to turn over and rotate the pole piece 5. Specifically, the rotary assembly 3 may include a plurality of rollers, and the turning action of the rollers is used to enable the pole piece 5 to smoothly rotate from the first oven layer 1 to the second oven layer 2, and the space occupied in the plane direction is reduced by utilizing the longitudinal space of the oven, thereby improving the space utilization rate. Moreover, when the rotary assembly 3 is used to dock the first oven layer 1 with the second oven layer 2, the pole piece 5 can be cut off from the middle section of the oven belt, and the belt running stability of the pole piece 5 is improved to avoid the situation where the pole piece 5 is deviated or wrinkled due to the excessively long belt running of the pole piece 5.

[0046] It is understandable that the number of the rollers can be one or more than two to achieve turning over the pole piece 5. In addition, the roller can be an active roller or a passive roller to meet different usage requirements. The present application does not limit the specific implementation of the rotary assembly 3.

[0047] The wrap angle adjustment component 4 is arranged alone at the entrance of the first drying channel 11 or at the exit of the second drying channel 21, or is arranged at the entrance of the first drying channel 11 and at the exit of the second drying channel 21 at the same time, and is used to increase the wrap angle of the pole piece 5 on the wrap angle adjustment component 4. Among them, the wrap angle adjustment component 4 adopts a structural design that can increase the wrap angle, so as to increase the entry angle when the oven is docked with the external equipment, thereby reducing the space occupied by the docking roller. In addition, increasing the wrap angle between the pole piece 5 and the roller can also increase the friction between the pole piece 5 and the roller, improve the stability of the pole piece 5 during the tape running process, thereby avoiding the situation where the pole piece 5 deviates or wrinkles due to excessive tape running.

[0048] In one embodiment, the wrap angle adjustment component 4 can be cooperated with two or more rollers to increase the wrap angle of the pole piece 5 through the limiting effect between the rollers. In another embodiment, the wrap angle adjustment component 4 can also be provided with a wind knife, a pressing piece, etc. for pushing the pole piece 5, so that the pole piece 5 is close to the belt and its wrap angle is increased. It can be understood that the purpose of providing the wrap angle adjustment component 4 is to increase the wrap angle of the pole piece 5 at the entrance of the first oven layer 1 or at the exit of the second oven layer 2, so that it can enter or be transported out of the oven using a shorter belt length. The present application does not limit the implementation method of the wrap angle adjustment component 4.

[0049] Furthermore, when the first oven layer 1 is arranged above the second oven layer 2, the upstream equipment of the pole piece 5 is arranged in parallel with the second oven layer 2. If the pole piece 5 needs to be docked from the upstream equipment into the first oven layer 1, in order to ensure the stability of the belt running, the traditional method requires more rollers for docking, so that more rollers are used for docking and a large amount of space is occupied. However, the present application adopts a design of increasing the wrap angle, which can reduce the number of rollers required for docking external equipment, thereby reducing the area occupied by arranging the docking rollers, and meeting the stability requirements of the double-layer oven belt running process.

[0050] As can be seen from the above, the double-layer folding oven of the present application can not only make full use of the space of the oven in the longitudinal direction, but also shorten the tape running distance, reduce the continuous tape running length of the pole piece 5, thereby reducing the fluctuation of the pole piece 5 during the transmission process, and greatly reduce the overall occupied area of ​​the oven while improving the tape running stability of the pole piece 5. At the same time, the reduction in equipment length can also facilitate the maintenance of the oven and reduce the cost of using the oven.

[0051] See also Figure 3 , the figure shows one structure of the angle adjustment component 4 provided in an embodiment of the present application.

[0052] In one embodiment, the wrap angle adjustment component 4 includes a first roller 42 and a plurality of air outlets 41 disposed on the opposite side of the first roller 42, and the air outlet of the air outlet 41 is disposed on a side close to the first roller 42 and facing the first roller 42. The air outlet length of the air outlet 41 can be equal to or greater than the width of the pole piece 5, such as by using a wind knife to blow air to the pole piece 5, so that the pole piece 5 can be close to the first roller 42, and the wrap angle of the pole piece 5 on the first roller 42 is increased, so that the pole piece 5 can be moved at a larger angle toward the entrance of the first oven layer 1 or toward the external equipment, thereby reducing the walking distance. The air outlet 41 can be connected to an air source to obtain an air outlet effect that can generate a certain wind pressure.

[0053] Furthermore, in order to improve the effect of increasing the wrap angle, the air outlet member 41 may include at least two, and the air outlet member 41 is arranged around the first roller 42. Specifically, when the air outlet member 41 is arranged around the first roller 42, if the force of the wind blown by the air outlet member 41 on the pole piece 5 is greater than the radial force of the pulling force exerted on the pole piece 5 by the upstream and downstream along the first roller 42, the part affected by the air outlet member 41 can be closely attached to the first roller 42, and the wrap angle can be increased compared to the case where there is no force from the air outlet member 41, and the belt docking angle when entering or outputting from the oven is increased, and the number of rollers required for docking is reduced, thereby reducing the area required to be occupied by the oven. Moreover, compared with the conventional staggered arrangement of rollers, the arrangement of the air outlet member 41 surrounding the first roller 42 can make the wind pressure of the air outlet member 41 received by various parts of the pole piece 5 more uniform, and the fit between the pole piece 5 and the first roller 42 is better, thereby improving the effect of increasing the wrap angle and further reducing the probability of the pole piece 5 running off track or wrinkling when passing through the first roller 42.

[0054] Of course, the number of the air outlet members 41 can be adjusted according to the needs. For example, if the pole piece 5 needs to use a larger turning angle for belt running, the air outlet members 41 can be set to 3 or more, so that the air outlet members 41 have a larger effect area on the pole piece 5, and the contact area and wrap angle between the pole piece 5 and the first roller 42 are also larger. At the same time, the air outlet members 41 can also be added to increase the wind pressure on the pole piece 5, so that it can achieve a larger effect of increasing the wrap angle.

[0055] In some embodiments, the distance between the air outlet piece 41 and the first roller 42 and the wind pressure of the air outlet can be configured to be adjustable. Among them, the distance between the air outlet piece 41 and the first roller 42 is 50mm-500mm, and the wind pressure of the air outlet piece 41 is 1kPa-30kPa. By adjusting the distance between the air outlet piece 41 and the first roller 42 and the wind pressure of the air outlet piece 41, the equipment's ability to control the wrap angle of the pole piece 5 can be improved, so that it can adapt to pole pieces 5 of different specifications and tape running speeds, and improve the flexibility of adjusting the wrap angle. At the same time, the adjustable distance between the air outlet piece 41 and the first roller 42 and the wind pressure of the air outlet can achieve an angle range adjustment of 0°-50° to adapt to different plant layout requirements and the number of rollers.

[0056] For example, if the wrap angle of the pole piece 5 with a smaller width is adjusted, the wind pressure of the air outlet member 41 can be appropriately reduced, thereby saving energy consumption. Alternatively, if the pole piece 5 is traveling at a faster speed, the pole piece 5 is subjected to relatively greater tension. At this time, the distance between the air outlet member 41 and the first roller 42 can be reduced, or the wind pressure blown by the air outlet member 41 can be increased, thereby increasing the friction between the pole piece 5 and the first roller 42, ensuring that the steering angle of the pole piece 5 is in a relatively ideal state when the pole piece 5 is traveling too long.

[0057] In a further preferred embodiment, the distance between the air outlet member 41 and the first roller 42 is 100mm-200mm, and the opening size of the air outlet member 41 is set to be adjustable, and the adjustment range can be set to 0-10mm, so that the air outlet effect of the air outlet member 41 can be adjusted according to the tape running requirements of different pole pieces 5, and can be adapted to pole pieces 5 of different sizes and tape running requirements. In addition, if the pole piece 5 of the oven deviates, the staff can quickly adjust the distance between the air outlet member 41 and the first roller 42, or adjust the wind pressure generated by the air outlet member 41, so as to improve the stability of the tape running of the pole piece 5 and the convenience of maintenance.

[0058] It can be understood that the above parameters and the specific implementation method of the air outlet piece 41 can be determined according to actual needs. For example, by setting an automatic or manually controlled adjustment mechanism for the air outlet piece 41, the position distance between it and the first roller 42 can be adjusted. The present application does not limit its specific implementation method.

[0059] In another preferred embodiment, the combination Figure 4 As shown, if it is necessary to further increase the wrap angle between the pole piece 5 and the roller when entering the oven or being transported out of the oven, the wrap angle adjustment assembly 4 may include at least two groups, and at least two groups of wrap angle adjustment assemblies 4 are arranged along the belt running direction. Multiple groups of wrap angle adjustment assemblies 4 can enable the pole piece 5 to turn gradually and finally enter the oven, or enter other downstream equipment, thereby providing better belt running stability.

[0060] In the implementation scheme of the above-mentioned wrap angle adjustment component 4, the wrap angle adjustment component 4 can also be configured to perform tension isolation on the pole piece 5 on the wrap angle adjustment component 4. When the pole piece 5 enters the oven from an external device, or is transported from the oven to an external device, in addition to the rollers that guide the tape, the traditional oven also needs to add tension isolation components to prevent the pole piece 5 from being affected by tension fluctuations during the tape running and running off track. The traditional tension isolation method is to set a group of tension isolation rollers, and use active rollers to perform tension isolation on the pole piece 5 according to the tension changes, but the traditional tension isolation method requires multiple rollers, and the adjustment of the active rollers is relatively complicated, which is not only costly but also increases the tape running length, thereby increasing the occupied area of ​​the docking part between the oven and the external device.

[0061] The present application can make the pole piece 5 close to the first roller 42 through the wrap angle adjustment component 4, so as to avoid the influence of the front and rear tension changes of the belt on the pole piece 5, and realize the tension isolation of the belt. Furthermore, the tension isolation effect can be adjusted by adjusting the distance between the air outlet 41 and the first roller 42, or by adjusting the wind pressure, so that the oven only needs the wrap angle adjustment component 4 to achieve tension isolation, without adding additional tension isolation rollers, which can further reduce the floor space occupied by the oven docking with external equipment, which is conducive to optimizing the layout of equipment in the factory.

[0062] See also Figure 5 , the figure shows the structure of the rotating component 3 provided in the embodiment of the present application.

[0063] Specifically, it includes a tension adjustment component, which is used to adjust the tension of the pole piece 5 running on the rotating component 3. If a double-layer oven structure is adopted, during the transfer from the upper oven layer to the lower oven layer, the deviation and wrinkling caused by the tension imbalance are likely to occur due to the large turning angle of the roller. The tension adjustment component is integrated into the rotating component 3, so that the oven adjusts the tension of the pole piece 5 in the middle of the running, which not only reduces the space for setting up a tension adjustment roller separately, but also can further improve the stability of the pole piece 5 running in the oven, so as to better meet the working requirements of the double-layer oven.

[0064] In one embodiment, the tension adjustment assembly includes at least one active roller 31 and at least two second rollers 32. The second rollers 32 are respectively located at the exit of the first drying channel 11 and the entrance of the second drying channel 21, and each of the second rollers 32 is provided with a tension sensor. The tension sensor is associated with the active roller 31 to adjust the tension of the pole piece 5.

[0065] Among them, the active roller 31 can be set in the middle of the pole piece 5 in the first drying channel 11 and the second drying channel 21 to support and turn the pole piece 5. The active roller 31 can actively drive the pole piece 5 on it through a common driving method in the field such as a motor or a cylinder, and the driving method of the active roller 31 is not limited to this. The second roller 32 is used to smooth the belt path so that the pole piece 5 can rotate smoothly between the first drying channel 11 and the second drying channel 21. In order to improve the rotation effect of the pole piece 5, a tension sensor can be set on one or both of the second rollers 32. The tension sensor can monitor the pressure of the pole piece 5 on it during the belt running, thereby obtaining the tension information of the pole piece 5 during the belt running, and enable the device to actively adjust the state of the active roller 31 according to the tension information, thereby realizing the tension adjustment of the pole piece 5 on the active roller 31. The specific tension adjustment method can refer to the implementation method in the field of technology.

[0066] See also Figure 6-7 In another embodiment, the rotary assembly 3 may include an active roller 31 and one or two driven rollers matched therewith, so as to improve the smoothness of the pole piece 5 during the rotation process. In addition, the active roller 31 may be set to one or more, and the specific number of the active roller 31 and the driven roller may be determined according to the actual situation.

[0067] See also Figure 8 In addition to using a contact type active roller 31, in one embodiment, the active roller 31 can also be set as a suspended active roller, which can make the pole piece 5 thereon suspended by blowing air, so as to avoid problems such as dust generated by the contact type roller, which affects the processing quality of the pole piece 5. Specifically, the suspended active roller can adopt air suspension or magnetic suspension, and the suspension method adopted by the suspended active roller 31 is not limited.

[0068] See also Fig. 9 , the figure shows another structure of the double-layer folding oven provided in an embodiment of the present application.

[0069] In one embodiment, the oven is provided with at least one set of roller groups and at least two sets of nozzle groups. The nozzle group includes a first nozzle group 71 provided on the first oven layer 1 and a second nozzle group 72 provided on the second oven layer 2. The roller group includes a plurality of rollers 8 arranged at intervals along the same plane, the roller group is arranged between the first nozzle group 71 and the second nozzle group 72, the pole piece 5 is conveyed along the upper and lower sides of the roller group, and the nozzle groups are all arranged toward the roller group, so as to blow and dry the side of the pole piece 5 facing the nozzle group.

[0070] The air nozzles 7 in the air nozzle group can be arranged at intervals along the first oven layer 1 and the second oven layer 2, respectively, to blow and dry the pole piece 5 conveyed by the roller group. The width range of the air nozzle 7 can be limited to within 100 mm, thereby increasing the number of air nozzles 7 under the same oven length to improve the drying efficiency, thereby achieving the purpose of reducing the oven length. The roller group can be controlled by a motor and driven by a belt to realize the conveyance of the pole piece 5.

[0071] Wherein, a roller group is arranged between the two groups of air nozzle groups, so that the space between the first oven layer 1 and the second oven layer 2 can be effectively utilized, thereby further reducing the volume of the oven.

[0072] At the same time, in order to improve thermal efficiency and thus reduce power consumption of the equipment, an isolation structure 6 may be provided between the rollers 8 to provide thermal isolation between the first oven layer 1 and the second oven layer 2 .

[0073] In one implementation, the roller group may include a single group, and an isolation structure 6 is provided between the rollers 8 in the roller group for isolating the first oven layer 1 and the second oven layer 2. The roller group is configured to support the pole piece 5 on both opposite sides.

[0074] Among them, the roller 8 can use rollers 8 of the same diameter, and the pole piece 5 can be carried on the opposite sides thereof, that is, the roller 8 contacts the pole piece 5 in the first drying channel 11 on the side close to the first drying channel 11, and at the same time contacts the pole piece 5 in the second drying channel 21 on the side close to the second drying channel 21, so as to support the pole pieces 5 in the two drying channels at the same time. Compared with the traditional method of setting multiple rows of rollers 8 to realize the carrying function, the rollers 8 in this embodiment occupy less space, so as to further reduce the volume occupied by the oven. At the same time, the use of the same group of rollers can ensure the synchronization of the pole pieces 5 on the upper and lower sides, thereby improving the stability of the carrying of the pole pieces 5.

[0075] In another implementation, combine Figure 2 The figure shows a method for implementing a roller group, which includes two groups of rollers 8 respectively arranged in the first oven layer 1 and the second oven layer 2, and the two groups of rollers 8 are isolated by an isolation structure 6. The first nozzle group 71 faces the rollers 8 in the first oven layer 1, and the second nozzle group 72 faces the rollers 8 in the second oven layer 2, so that the pole piece 5 can also be dried.

[0076] It is understandable that the arrangement of the roller group and the air nozzle group can be determined according to actual conditions. For example, the first air nozzle group 71 and the second air nozzle group 72 are both arranged downward so that the wet surface of the pole piece 5 is always facing upward.

[0077] In addition, in order to improve the drying effect of the electrode 5, the roller group in the first oven layer 1 is arranged to support one side of the electrode 5 upward, and the first air nozzle group 71 is arranged downward, so that the wet surface of the electrode 5 is facing upward and facing the first air nozzle group 71, and the dry surface of the electrode 5 is close to the roller group, thereby reducing the fluctuation of the electrode 5 and avoiding the situation where the wet material is scraped onto the air nozzle 7 due to large fluctuations on the surface of the electrode 5. In addition, the wet surface facing upward can also improve the drying effect of the wet surface of the electrode 5.

[0078] During the operation of the double-layer folding oven, the pole piece 5 enters the first oven layer 1 located on the upper layer through the wrap angle adjustment component 4. At this time, the wet surface faces upward, and the dry surface is pressed against one side of the roller group by the wind pressure of the first air nozzle group 71. The first air nozzle group 71 blows air toward the wet surface to dry it, completing the first drying operation in the oven, and the wet surface of the pole piece 5 becomes a semi-dry surface. Then, the pole piece 5 comes out from the outlet of the first oven layer 1, and then turns to enter the second oven layer 2 located on the lower layer through the rotary component 3. At this time, the semi-dry surface faces downward, and the dry surface is pressed against the other side of the roller group by the wind pressure of the second air nozzle group 72. The second air nozzle group 72 blows air toward the semi-dry surface to dry it, completing the second drying operation in the oven. The double-layer folding oven in the present application can achieve a drying length twice that of a traditional oven under the same oven occupancy area, which can effectively shorten the length of the oven, reduce maintenance difficulty and use cost.

[0079] See also Figure 10-11 , the figure shows a first perspective and a second perspective of the circulating bellows 9 provided in an embodiment of the present application, wherein the second perspective is a side view of the first perspective.

[0080] like Figure 10-11 As shown, the circulating wind box 9 includes a first wind chamber 91 and a second wind chamber 92, wherein the air supply port 911 of the first wind chamber 91 is connected to one end of the inlet of the first oven layer 1, and the return air port 912 of the first wind chamber 91 is connected to one end of the outlet of the first oven layer 1. The air supply port 921 of the second wind chamber 92 is connected to one end of the inlet of the second oven layer 2, and the return air port 922 of the second wind chamber 92 is connected to one end of the outlet of the second oven layer 2. The first wind chamber 91 is arranged at the upper part of the circulating wind box 9, and the second wind chamber 92 is arranged at the lower part of the circulating wind box 9, thereby utilizing the longitudinal space of the circulating wind box 9 and saving floor space. The air supply port 911 of the first wind chamber 91 is isolated from the return air port, and the air supply port 921 of the second wind chamber 92 is isolated from the return air port.

[0081] The circulating air box 9 also includes a first fan 93 and a second fan 94, wherein the air outlet of the first fan 93 is connected to the air supply port 911 of the first air chamber 91, and the air outlet of the second fan 94 is connected to the air supply port 921 of the second air chamber 92, so that the first fan 93 and the second fan 94 respectively provide hot air to the first oven layer 1 and the second oven layer 2 for drying the electrode 5.

[0082] For details, see Fig.12 , the figure shows a schematic diagram of the air duct structure of the double-layer folding oven provided in an embodiment of the present application.

[0083] like Fig.12As shown, the oven further includes a first air supply chamber 12 and a first return air chamber 13 arranged on the first oven layer 1, and a second air supply chamber 22 and a second return air chamber 23 arranged on the second oven layer 2. The first air supply chamber 12 is connected to the air supply port 911 of the first air chamber 91, and the first return air chamber 13 is connected to the return air port 922 of the second air chamber 92; the second air supply chamber 22 is connected to the air supply port 921 of the second air chamber 92, and the second return air chamber 23 is connected to the return air port 922 of the second air chamber 92. The airflow in the first air supply chamber 12 is blown out through the air nozzle 7 and returned from the first return air chamber 13, and the airflow in the second air supply chamber 22 is blown out through the air nozzle 7 and returned from the second return air chamber 23. The circulating air duct can shorten the circulation path of the airflow, reduce heat loss, and more easily control the temperature of the airflow by setting the first air chamber 91 and the second air chamber 92, and connecting with the first oven layer 1 and the second oven layer 2.

[0084] In one embodiment, the circulation air box 9 further includes a return air duct 95, which is arranged through the middle of the first air chamber 91 and the second air chamber 92, and the return air duct 95 is connected with the return air port 912 of the first air chamber 91 and the return air port 922 of the second air chamber 92. By arranging the return air duct 95 in the middle of the circulation air box 9, the return air distance between the first return air chamber 13 and the second return air chamber 23 is shortened, which not only shortens the return air path and reduces the volume, but also improves the circulation efficiency of the air duct.

[0085] In addition, the lower part of the circulating wind box 9 and the height range of the platform can be designed to be 1.5-2.5 meters, which can facilitate the provision of a maintenance port on the circulating wind box 9 for easy maintenance. And the circulating wind box 9 can be arranged at the back of the entire oven to reduce the volume occupied.

[0086] In one embodiment, the airflow direction in the first drying channel 11 and the airflow direction in the second drying channel 21 are the same as the running direction of the electrode 5, thereby reducing the disturbance to the electrode 5 and effectively ensuring the smooth running of the electrode 5. Figure 2 The cross-sectional areas of the first air supply chamber 12 and the second air supply chamber 22 gradually decrease along the belt conveying direction, thereby ensuring the uniformity of the air outlet of the nozzle group. In addition, guide plates can be provided inside the first air supply chamber 12 and the second air supply chamber 22 to ensure the uniformity of the air outlet in the lateral direction inside the oven.

[0087] See also Fig.13 , the figure shows a schematic diagram of the airflow direction of the air duct of the double-layer folding oven provided in an embodiment of the present application.

[0088] like Fig.13 As shown, combined Figure 10-12In the actual operation of the double-layer folding oven, the airflow generated by the first fan 93 enters the first air chamber 91 from the upper left side of the circulating air box 9, enters the first air supply chamber 12 through the air supply port 911 of the first air chamber 91 located on the upper right side of the circulating air box 9, and enters the first return air chamber 13 through the air nozzle 7. Then, the airflow enters the circulating air box 9 from the first return air chamber 13 through the return air port 912 of the first air chamber 91 located on the upper left side of the circulating air box 9, and is discharged through the return air duct 95 located in the middle and continues the heating cycle. The airflow generated by the second fan 94 enters the second air chamber 92 from the upper right side of the circulating air box 9, enters the second air supply chamber 22 through the air supply port 921 of the second air chamber 92 located on the lower left side of the circulating air box 9, and enters the second return air chamber 23 through the air nozzle 7. Then, the airflow enters the circulating air box 9 from the second return air chamber 23 through the return air port 922 of the second air chamber 92 located at the lower right side of the circulating air box 9, and is discharged through the return air duct 95 located in the middle to continue the heating cycle.

[0089] Because the traditional circulating bellows 9 is a long oven, the hot air needs to flow from one end of the oven through a long passage to the other end to supply air to the air nozzle 7, which makes it easy for the temperature of the hot air delivered to different positions in the oven to be different, and the temperature uniformity is poor. However, the circulating bellows 9 in the present application, combined with the structural characteristics of the upper and lower oven layers, supplies air to the first oven layer 1 and the second oven layer 2 distributed up and down respectively, which not only shortens the circulation path due to the reduction in the length of the oven, but also makes its temperature uniform, and the air flow temperature in the oven is easier to maintain, thereby improving the energy efficiency of the oven. In addition, the circulating bellows 9 can be integrated on the side of the oven to reduce the volume occupied.

[0090] In addition, see Fig.14 , the figure shows another schematic diagram of the air duct flow direction of the double-layer folding oven provided in an embodiment of the present application.

[0091] like Fig.14 As shown, Fig.13 The difference is that the position where the first fan 93 enters the first air chamber 91 is opposite to the position where the second fan 94 enters the second air chamber 92, which can also achieve the same effect. Of course, the airflow path is affected by the running direction of the pole piece 5, and the positions of the air inlet and return air can be adjusted accordingly according to the running direction of the pole piece 5, and the same or similar effects can be achieved.

[0092] From the above, it can be seen that the double-layer reciprocating oven can optimize and shorten the gas circulation path of the oven through the design of the circulating bellows and the double-layer reciprocating structure of the oven, which can effectively improve the space utilization of the equipment, thereby further reducing the occupied area of ​​the double-layer reciprocating oven and reducing the costs incurred during the manufacturing and use process.

[0093] The serial numbers of the embodiments of this application are only for description and do not represent the advantages and disadvantages of the embodiments. The above are only preferred embodiments of this application, and do not limit the patent scope of this application. Any equivalent device or equivalent process transformation made by using the contents of the description and drawings of this application, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of this application.

Claims

1. A double-layer folding oven, characterized in that: The oven comprises: The first oven layer is provided with a first drying channel for drying the electrode for the first time; The second oven layer is provided with a second drying channel for performing a second drying on the electrode sheet; the second oven layer is stacked with the first oven layer in the height direction; A rotating assembly, disposed between the outlet of the first drying channel and the inlet of the second drying channel, for turning over and rotating the electrode piece; and The wrap angle adjustment component is arranged at the entrance of the first drying channel and / or the exit of the second drying channel, and is used to increase the wrap angle of the pole piece on the wrap angle adjustment component.

2. The double-layer folding oven according to claim 1, characterized in that: The wrap angle adjustment assembly includes a first roller and a plurality of air outlet members arranged on the opposite side of the first roller, and the air outlets of the air outlet members are arranged on a side close to the first roller and facing the first roller.

3. The double-layer folding oven according to claim 2, characterized in that: The air outlet members include at least two, and the air outlet members are arranged around the first roller.

4. The double-layer folding oven according to any one of claims 1 to 3, characterized in that: The wrap angle adjustment components include at least two groups, and the at least two groups of wrap angle adjustment components are arranged along the tape running direction.

5. The double-layer folding oven according to any one of claims 1 to 3, characterized in that: The wrap angle adjustment assembly is configured to also be used to perform tension isolation on the pole piece running on the wrap angle adjustment assembly.

6. The double-layer folding oven according to claim 2 or 3, characterized in that: The distance between the air outlet member and the first roller is 50 mm-500 mm, and the wind pressure of the air outlet member is 1 kPa-30 kPa.

7. The double-layer folding oven according to claim 1, characterized in that: The rotary assembly includes a tension adjustment assembly, and the tension adjustment assembly is used to adjust the tension of the pole piece on the rotary assembly.

8. The double-layer folding oven according to claim 7, characterized in that: The tension adjustment assembly includes at least one active roller and at least two second rollers; The second rollers are respectively located at the exit of the first drying channel and the entrance of the second drying channel, and a tension sensor is provided on the second roller; the tension sensor is associated with the active roller to adjust the tension of the pole piece.

9. The double-layer folding oven according to claim 8, characterized in that: The active roller is a contact type active roller or a suspended type active roller.

10. The double-layer folding oven according to claim 1, characterized in that: The oven further comprises a circulating wind box, wherein the circulating wind box is provided with a first wind chamber and a second wind chamber; The air supply port of the first air chamber is connected to one end of the inlet of the first oven layer, and the air return port of the first air chamber is connected to one end of the outlet of the first oven layer; The air supply port of the second air chamber is connected to one end of the inlet of the second oven layer, and the air return port of the second air chamber is connected to one end of the outlet of the second oven layer.

11. The double-layer folding oven according to claim 10, characterized in that: The circulating bellows also includes a return air duct; The return air duct is arranged through the middle of the first air chamber and the second air chamber, and the return air duct is communicated with the return air port of the first air chamber and the return air port of the second air chamber.

12. The double-layer folding oven according to claim 1, characterized in that: The oven is provided with at least one set of rollers and at least two sets of air nozzles; The nozzle group includes a first nozzle group arranged on the first oven layer and a second nozzle group arranged on the second oven layer; The roller group includes a plurality of rollers arranged at intervals along the same plane, and the roller group is arranged between the first nozzle group and the second nozzle group; The pole piece is carried along the upper and lower sides of the roller group, and the air nozzle groups are arranged toward the roller group to blow and dry the side of the pole piece facing the air nozzle group.

13. The double-layer folding oven according to claim 12, characterized in that: The roller group includes a separate group, and an isolation structure for isolating the first oven layer and the second oven layer is provided between the rollers in the roller group; The roller group is configured so that both opposite sides are used for supporting the pole pieces.

14. The double-layer folding oven according to claim 12, characterized in that: The roller group includes two groups, and an isolation structure for isolating the first oven layer and the second oven layer is provided between the two groups of roller groups; The two groups of roller groups support the pole pieces of the first oven layer and the pole pieces of the second oven layer respectively.

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