Coating drying equipment

Abstract

The utility model relates to coating and drying equipment and belongs to the technical field of battery electrodes, the coating and drying equipment comprises a box body, a conveying mechanism and a plurality of air supply pipelines, the conveying mechanism conveys pole pieces from the head end of a channel of the box body to the tail end of the channel, and the air supply pipelines are sequentially arranged above the pole pieces at intervals in the first horizontal direction; the air supply pipeline extends in the second horizontal direction perpendicular to the first horizontal direction, a plurality of air supply holes are formed in the side, close to the head end of the channel, of the air supply pipeline, and airflow in the air supply pipeline obliquely flows downwards through the air supply holes. According to the coating drying equipment provided by the invention, airflow blown out of the air supply pipeline obliquely flows downwards, so that the contact area of the airflow and the pole piece can be increased, the drying efficiency is improved, the distance of the airflow can be increased, the situation that the quality of the pole piece is influenced due to the fact that the flow speed is too high when the airflow makes contact with the pole piece is avoided, and the drying quality is improved to a certain extent.

Description

Technical Field

[0001] This application relates to the technical field of battery electrodes, and particularly to a coating and drying device. Background Art

[0002] The battery electrode sheet is an important part of the battery, which undertakes the functions of current conduction and chemical reaction catalysis. In a battery, there are usually two electrodes, the positive electrode and the negative electrode, which are responsible for the flow of electrons and the transfer of ions respectively. With the increasing requirements for the battery's endurance mileage and safety performance, etc., the requirements for the battery electrode coating process are also getting higher and higher. Especially in the drying process of the electrode sheet, it will directly affect the forming quality of the electrode sheet. However, the existing coating and drying devices have many problems such as slow drying efficiency and poor drying quality. Summary of the Utility Model

[0003] Based on this, it is necessary to provide a coating and drying device to solve the technical problems of slow drying efficiency and poor drying quality of the existing coating and drying devices.

[0004] To achieve the above object, this application provides a coating and drying device, which includes:

[0005] A box body, which forms a channel along the first horizontal direction;

[0006] A transportation mechanism, which is arranged in the box body and transports the electrode sheet from the head end of the channel to the tail end of the channel; and

[0007] Multiple air supply pipes, which are arranged at intervals along the first horizontal direction above the electrode sheet in sequence. The air supply pipes extend along the second horizontal direction perpendicular to the first horizontal direction. A plurality of air supply holes are arranged on the side of the air supply pipe close to the head end of the channel, and the air flow in the air supply pipe flows obliquely downward through the air supply holes.

[0008] Optionally, the air supply pipe is formed by splicing a plurality of rectangular plates.

[0009] Optionally, the plurality of air supply holes are arranged at intervals along the second horizontal direction in sequence.

[0010] Optionally, there are 8 air supply holes arranged on the air supply pipe.

[0011] Optionally, the aperture diameters of the plurality of air supply holes increase gradually from both ends to the middle along the second horizontal direction, and the distances between adjacent two air supply holes increase gradually from both ends to the middle along the second horizontal direction.

[0012] Optionally, the aperture diameters of the plurality of air supply holes increase by 5 mm gradually from both ends to the middle along the second horizontal direction, and the distances between adjacent two air supply holes increase by 3 mm gradually from both ends to the middle along the second horizontal direction.

[0013] Optionally, the initial aperture of the air supply holes is 10 mm, and the initial distance between two adjacent air supply holes is 60 mm.

[0014] Optionally, all the air supply ducts share a single blower.

[0015] Optionally, the coating and drying equipment further includes a return air mechanism disposed inside the box body, and the return air mechanism is used to discharge the gas inside the box body out of the box body.

[0016] Optionally, there are two return air mechanisms, and the two return air mechanisms are respectively disposed above and below the pole piece.

[0017] The beneficial effects of the coating and drying equipment provided by this application are as follows: Compared with the prior art, the coating and drying equipment of this application includes a box body, a transportation mechanism, and a plurality of air supply ducts. The transportation mechanism transports the pole piece from the head end of the channel of the box body to the tail end of the channel. The plurality of air supply ducts are sequentially arranged at intervals along the first horizontal direction above the pole piece. The air supply ducts extend along the second horizontal direction perpendicular to the first horizontal direction. A plurality of air supply holes are provided on one side of the air supply duct close to the head end of the channel. The air flow in the air supply duct flows obliquely downward through the air supply holes; thus, compared with blowing parallel to the pole piece and blowing perpendicular to the pole piece in the prior art, the air flow blown out by the air supply duct of this application flows obliquely downward, which can not only increase the contact area between the air flow and the pole piece, improve the drying efficiency, but also increase the path of the air flow, avoid the excessive flow velocity when the air flow contacts the pole piece and affect the quality of the pole piece, and improve the drying quality to a certain extent. Description of the Drawings

[0018] In order to more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of this application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0019] Figure 1 Schematic cross-sectional structure of the coating and drying equipment provided by the embodiment of this application Figure 1 ;

[0020] Figure 2 Schematic cross-sectional structure of the coating and drying equipment provided by the embodiment of this application Figure 2 ;

[0021] Figure 3 Distribution diagram of the air discharge volume of the same branch pipe of the coating and drying equipment provided by the embodiment of this application and the coating and drying equipment with other opening positions;

[0022] Figure 4This is the total exhaust air volume distribution diagram of different branch pipes of the coating and drying equipment provided by the embodiments of this application and the coating and drying equipment at other opening positions.

[0023] Explanation of reference numerals:

[0024] 1. Box body; 110. Channel;

[0025] 2. Transportation mechanism;

[0026] 3. Air supply duct; 310. Air supply holes;

[0027] 4. Air return mechanism;

[0028] 5. Electrode sheet. Detailed implementation manners

[0029] To make the above objects, features, and advantages of this application more obvious and understandable, the following will describe the detailed implementation manners of this application with reference to the accompanying drawings. Many specific details are set forth in the following description to fully understand this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of this application. Therefore, this application is not limited by the specific embodiments disclosed below.

[0030] In the description of this application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to this application.

[0031] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of this application, "a plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0032] In this application, unless otherwise clearly defined or limited, terms such as "installed", "connected", "joined", "fixed", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0033] In this application, unless otherwise clearly defined or limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0034] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only implementation.

[0035] The embodiments of this application provide a coating and drying device. Please refer to Figures 1 to 4 , this coating and drying device includes a box body 1, a conveying mechanism 2 and a plurality of air supply pipes 3. The box body 1 is formed with a channel 110 along a first horizontal direction; the conveying mechanism 2 is disposed in the box body 1, and the conveying mechanism 2 conveys the electrode sheet 5 from the head end of the channel 110 to the tail end of the channel 110; a plurality of air supply pipes 3 are sequentially arranged at intervals above the electrode sheet 5 along the first horizontal direction, the air supply pipes 3 extend along a second horizontal direction perpendicular to the first horizontal direction, and a plurality of air supply holes 310 are provided on one side of the air supply pipe 3 close to the head end of the channel 110, and the air flow in the air supply pipe 3 flows obliquely downward through the air supply holes 310.

[0036] In the embodiments of the present application, the coating and drying equipment includes a box body 1, a conveying mechanism 2, and a plurality of air supply pipes 3. The conveying mechanism 2 conveys the electrode sheet 5 from the head end of the channel 110 of the box body 1 to the tail end of the channel 110. The plurality of air supply pipes 3 are sequentially arranged at intervals along the first horizontal direction above the electrode sheet 5. The air supply pipes 3 extend along the second horizontal direction perpendicular to the first horizontal direction. A plurality of air supply holes 310 are provided on one side of the air supply pipe 3 close to the head end of the channel 110. The air flow in the air supply pipe 3 flows obliquely downward through the air supply holes 310. Thus, compared with blowing air parallel to the electrode sheet 5 and blowing air perpendicular to the electrode sheet 5 in the prior art, the air flow blown out by the air supply pipe 3 of the present application flows obliquely downward, which can not only increase the contact area between the air flow and the electrode sheet 5 and improve the drying efficiency, but also increase the path of the air flow, avoid the excessive flow velocity when the air flow contacts the electrode sheet 5 and affect the quality of the electrode sheet 5, and improve the drying quality to a certain extent.

[0037] Among them, please refer to Figure 3 and Figure 4 , fluid simulation is carried out on the above three exhaust air pipe structure schemes under the same boundary conditions. The exhaust air volume distribution diagrams after simulation processing are as shown in Figure 3 and Figure 4 . The total opening areas of the three structure schemes are the same, but the opening surfaces on the exhaust air pipes are different. It can be seen from the figure that the exhaust air volume distribution trends of the three in the same branch pipe are basically the same, that is, large in the middle and small at both sides; at the same time, the exhaust air volume distribution trends of different branch pipes are also basically the same, only the exhaust air volume values are different. The inclined opening is 34% larger than the bottom opening and 82% larger than the side openings. That is, the exhaust air volume of the inclined opening facing the moving direction of the electrode sheet 5 is the best, and at the same time, it ensures that the exhaust air volume distribution trend of a single branch pipe is large in the middle and small at both sides.

[0038] Furthermore, the inclination angle of the air flow of the air supply holes 310 is adapted to the wind speed angle affected by the movement of the electrode sheet 5 and the suction negative pressure, and there is no unique limitation here.

[0039] In one embodiment, please refer to Figure 1 , the air supply pipe 3 is formed by splicing a plurality of rectangular plates.

[0040] Specifically, all the air supply holes 310 are uniformly arranged along the length direction of a rectangular plate. Compared with opening holes on a circular pipe, the difficulty of opening holes on the plate is lower.

[0041] In one embodiment, please refer to Figure 2 , a plurality of air supply holes 310 are sequentially arranged at intervals along the second horizontal direction.

[0042] In one embodiment, please refer to Figure 2, there are 8 air supply holes 310 provided on the air supply duct 3, and the number of the air supply holes 310 is flexibly set according to the actual length of the air supply duct 3, and no unique limitation is made here.

[0043] In one embodiment, please refer to Figure 2 , the apertures of the plurality of air supply holes 310 increase sequentially from both ends to the middle along the second horizontal direction, and the spacing between adjacent two air supply holes 310 increases sequentially from both ends to the middle along the second horizontal direction, so that a single air duct forms a working condition with a large air supply volume in the middle and a small air supply volume at both ends, which adapts to the characteristics that the middle part of the pole piece 5 is not easy to be dried and the edge part is easy to be dried, and improves the drying effect of the pole piece 5.

[0044] Exemplarily, the apertures of the plurality of air supply holes 310 increase sequentially by 5 mm from both ends to the middle along the second horizontal direction, and the spacing between adjacent two air supply holes 310 increases sequentially by 3 mm from both ends to the middle along the second horizontal direction.

[0045] Exemplarily, the initial aperture of the air supply hole 310 is 10 mm, and the initial spacing between adjacent two air supply holes 310 is 60 mm.

[0046] In summary, the number of the air supply holes 310 on the above single air supply duct 3, the increment of the apertures of the plurality of air supply holes 310, the increment of the spacing between adjacent two air supply holes 310, the initial aperture of the air supply hole 310, and the initial spacing between adjacent two air supply holes 310 are all the optimal parameters selected to adapt to the 1.4 m box body, so as to obtain the optimal exhaust air volume distribution and the best value of the total exhaust air volume.

[0047] It can be understood that in other embodiments, the number of the air supply holes 310 on the single air supply duct 3, the increment of the apertures of the plurality of air supply holes 310, the increment of the spacing between adjacent two air supply holes 310, the initial aperture of the air supply hole 310, and the initial spacing between adjacent two air supply holes 310 can all be flexibly designed according to the actual width of the pole piece 5 and the actual drying requirement, and no unique limitation is made here.

[0048] In one embodiment, please refer to Figure 1 , all the air supply ducts 3 share a single fan, which saves costs.

[0049] In one embodiment, please refer to Figure 1 , the coating and drying equipment further includes a return air mechanism 4 arranged in the box body 1, and the return air mechanism 4 is used to discharge the gas in the box body 1 out of the box body 1.

[0050] The return air mechanism 4 can timely discharge the gas in the box body 1 and take away the heat, avoiding the heat gradually gathering in the box body 1 and causing damage to the pole piece 5, improving the heating uniformity of the pole piece 5, and improving the drying quality of the pole piece 5.

[0051] In one embodiment, refer to Figure 1 , there are two air return mechanisms 4, and the two air return mechanisms 4 are respectively arranged above and below the pole piece 5, further improving the heating uniformity of the pole piece 5.

[0052] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0053] The above-described embodiments only represent several implementation manners of the present application. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the appended claims.

Claims

1. A coating and drying device, characterized in that: include: The box body has a passage formed along a first horizontal direction; A transport mechanism is disposed in the box, and the transport mechanism transports the electrode from the head end of the channel to the end end of the channel; as well as A plurality of air supply ducts are arranged above the pole piece at intervals in sequence along the first horizontal direction, the air supply ducts extend along a second horizontal direction perpendicular to the first horizontal direction, a plurality of air supply holes are arranged on one side of the air supply duct close to the head end of the channel, and the air flow in the air supply duct flows obliquely downward through the air supply holes.

2. The coating and drying equipment according to claim 1, characterized in that: The air supply duct is formed by splicing a plurality of rectangular plates.

3. The coating and drying equipment according to claim 1, characterized in that: The plurality of air supply holes are arranged in sequence at intervals along the second horizontal direction.

4. The coating and drying equipment according to claim 1, characterized in that: The air supply duct is provided with 8 air supply holes.

5. The coating and drying equipment according to claim 3, characterized in that: The apertures of the plurality of air supply holes increase gradually from both ends to the middle along the second horizontal direction, and the distance between two adjacent air supply holes increases gradually from both ends to the middle along the second horizontal direction.

6. The coating and drying equipment according to claim 5, characterized in that: The apertures of the plurality of air supply holes increase by 5 mm from both ends to the middle along the second horizontal direction, and the spacing between two adjacent air supply holes increases by 3 mm from both ends to the middle along the second horizontal direction.

7. The coating and drying equipment according to claim 5, characterized in that: The initial aperture of the air supply holes is 10 mm, and the initial spacing between two adjacent air supply holes is 60 mm.

8. The coating and drying equipment according to claim 1, characterized in that: All the air supply ducts share one fan.

9. The coating and drying equipment according to claim 1, characterized in that: The coating and drying equipment further comprises an air return mechanism disposed in the box body, and the air return mechanism is used to discharge the gas in the box body out of the box body.

10. The coating and drying equipment according to claim 9, characterized in that: The two air return mechanisms are provided, and the two air return mechanisms are respectively provided above the pole piece and below the pole piece.

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