CN220039005U - Drying device and pole piece processing system - Google Patents

Abstract

The utility model relates to a drying device and a pole piece processing system. A drying apparatus for drying pole pieces, the drying apparatus comprising: a drying cavity is arranged in the box body; the conveying mechanism is arranged in the drying cavity and is provided with a plurality of conveying rollers, the conveying rollers are distributed on two opposite sides of the drying cavity in a staggered manner along the conveying direction of the pole pieces, and the pole pieces are wound on the conveying rollers in a reciprocating manner; and the drying mechanism is arranged in the drying cavity and is used for drying the pole piece. The pole piece processing system comprises the drying device. The drying device and the pole piece processing system have the advantages that the conveying rollers are distributed on the two opposite sides of the drying cavity in a staggered mode along the conveying direction of the pole piece, the pole piece is wound on the conveying rollers in a reciprocating mode, the pole piece with a certain length can be stored in the drying cavity, and the pole piece is dried through the drying mechanism in the drying cavity, so that the whole structure of the drying device is compact, and the drying effect is good.

Description

Drying device and pole piece processing system

Technical Field

The utility model relates to the technical field of pole piece processing, in particular to a drying device and a pole piece processing system.

Background

At present, in the traditional pole piece drying device, the pole piece is arranged horizontally, and the air knife structures are arranged at the upper side and the lower side of the pole piece, and because the air knives are arranged in a large number, the air speed of an air duct outlet is relatively low under the same air quantity, so that the convection heat exchange coefficient is small, and the heat exchange efficiency is low. Due to the horizontal arrangement of the pole pieces, more than ten sections of ovens and even more than ten sections of ovens are needed to be sequentially arranged for drying the pole pieces, and the structure occupies a large volume.

Disclosure of Invention

Based on the above, it is necessary to provide a drying device and a pole piece processing system, aiming at the problems of large occupied volume and low drying efficiency of the existing pole piece drying device.

A drying apparatus for drying pole pieces, the drying apparatus comprising:

the box body is internally provided with a drying cavity, a feed inlet and a discharge outlet which are communicated with the drying cavity;

the conveying mechanism is arranged in the drying cavity and is provided with a plurality of conveying rollers, and the conveying rollers are distributed on two opposite sides of the drying cavity in a staggered manner along the conveying direction of the pole piece; the pole piece passes through the drying cavity from the feeding port and is output from the discharging port, and the pole piece is wound on each conveying roller in a reciprocating manner;

and the drying mechanism is arranged in the drying cavity and is used for drying the pole piece.

Above-mentioned drying device, each conveying roller is crisscross in the relative both sides in stoving chamber along the direction of delivery of pole piece, and the pole piece is the reciprocating type around locating each conveying roller, can make the pole piece of certain length store in stoving intracavity to dry the pole piece through the drying mechanism in the stoving intracavity, make drying device's overall structure compact and stoving effectual.

In one embodiment, the plurality of conveying rollers comprise first roller bodies and second roller bodies distributed on two opposite sides of the drying cavity, the second roller bodies and the first roller bodies are respectively positioned on different sides of the pole piece in the thickness direction, the first side of the pole piece in the thickness direction is in contact with the surface of the first roller body, and the second side of the pole piece in the thickness direction is suspended relative to the surface of the second roller body;

and a plurality of air blowing ports are uniformly distributed on the surface of the second roller body, and the air blowing directions of all the air blowing ports face the pole piece.

In one embodiment, the drying mechanism comprises a main body and a drying air outlet arranged on the main body, wherein the drying air outlet is used for outputting hot air to dry the pole piece;

the drying mechanism is provided with two drying air outlets along the conveying direction of the pole piece, and the air outlet direction of each drying air outlet is arranged at an included angle with the pole piece.

In one embodiment, the drying device further comprises a flow guiding piece, at least one flow guiding piece is arranged between every two adjacent first roller bodies, and a flow guiding channel communicated with the drying air outlet is formed by arranging the outer wall of the flow guiding piece and the pole piece at intervals.

In one embodiment, the box body is further provided with a first air inlet and a first air outlet which are communicated with the drying air outlet, the first air inlet and the first air outlet are positioned on one side of the box body along a first direction and are different in height position, and the first direction is intersected with the conveying direction and the vertical direction of the pole piece.

In one embodiment, the drying device comprises a first flow equalizing plate, a second flow equalizing plate and a third flow equalizing plate, wherein the second flow equalizing plate and the third flow equalizing plate are arranged in the box body at intervals along the vertical direction, the box body is divided into an air inlet cavity, a drying cavity and an air outlet cavity, the first air inlet is positioned in the air inlet cavity, the first air outlet is positioned in the air outlet cavity, and at least one first flow equalizing plate is arranged in each drying air outlet.

In one embodiment, the drying device further comprises a plurality of flow dividing sheets, the flow dividing sheets are arranged in the air inlet cavity at intervals to form a flow dividing channel, and the flow dividing channel is communicated with the first air inlet and the drying cavity.

In one embodiment, each of the flow dividing sheets is L-shaped, the head of each of the flow dividing sheets is arranged at the first air inlet at intervals, and the tail of each of the flow dividing sheets is arranged at the edge of the air inlet cavity at intervals.

In one embodiment, the air inlet cavity comprises two first side walls which are oppositely arranged along the conveying direction of the pole piece; in the first direction, the two first side walls are in a tapered structure from one end close to the first air inlet to one end far away from the first air inlet.

A pole piece processing system comprises the drying device.

The pole piece processing system is characterized in that the drying device can store pole pieces with a certain length in the drying cavity, and the pole pieces are dried through the drying mechanism in the drying cavity, so that the overall structure of the drying device is compact and the drying effect is good.

Drawings

Fig. 1 is a schematic diagram of a drying apparatus according to an embodiment.

Fig. 2 is a partial enlarged view of a portion of the drying apparatus of fig. 1.

Fig. 3 is a schematic view of the drying apparatus shown in fig. 1.

Fig. 4 is an internal schematic view of a drying chamber of the drying apparatus of fig. 1.

Fig. 5 is an internal schematic view of an air inlet chamber of the drying apparatus shown in fig. 1.

Reference numerals:

10. a pole piece; 100. a case; 101. a drying chamber; 102. a feed inlet; 103. a discharge port; 104. a first air inlet; 105. a first exhaust outlet; 106. an air inlet cavity; 106a, a first sidewall; 107. an air outlet cavity; 200. a conveying mechanism; 210. a first roller body; 220. a second roller body; 221. an air blowing port; 300. a drying mechanism; 310. a main body; 311. drying an air outlet; 312. drying the air inlet; 400. a flow guide; 401. a diversion channel; 500. a first flow equalizing plate; 600. a second flow equalizing plate; 601. a second flow equalizing hole; 700. a third flow equalizing plate; 701. a third flow equalizing hole; 800. a diverter blade; 801. a shunt channel.

Detailed Description

In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model. The present utility model may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the utility model, whereby the utility model is not limited to the specific embodiments disclosed below.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "initial," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

Referring to fig. 1 and 2, a drying device in an embodiment is used for drying a pole piece 10, the drying device includes a box 100, a conveying mechanism 200 and a drying mechanism 300, a drying cavity 101 is disposed in the box 100, and the drying mechanism 300 is disposed in the drying cavity 101 and is used for drying the pole piece 10. The conveying mechanism 200 is disposed in the drying cavity 101 and has a plurality of conveying rollers, each conveying roller is alternately disposed on two opposite sides of the drying cavity 101 along the conveying direction of the pole piece 10, and the pole piece 10 is reciprocally wound around each conveying roller.

The conveying direction of the pole piece 10 is the X direction shown in fig. 1. Each conveying roller is distributed on two opposite sides of the drying cavity 101 along the conveying direction of the pole piece 10 in a staggered manner, and can be understood as follows: the conveying rollers are distributed on opposite sides of the drying chamber 101, and the positions of the conveying rollers in the X direction shown in fig. 1 do not overlap. The pole piece 10 is reciprocally wound on each conveying roller, and can be understood as follows: the pole piece 10 is wound around one conveying roller positioned at one side of the drying cavity 101, then wound around the other conveying roller positioned at the other side of the drying cavity 101, and the winding is repeated in a circulating way.

The above-mentioned drying device, each conveying roller is crisscross in the relative both sides of stoving chamber 101 along the direction of delivery of pole piece 10, and pole piece 10 is the reciprocating type around locating each conveying roller, can make the pole piece 10 of certain length store in stoving chamber 101 to dry pole piece 10 through the drying mechanism 300 in the stoving chamber 101, make drying device's overall structure compact and stoving effectual.

In the above embodiment, referring to fig. 1 and 3 in combination, opposite sides of the case 100 along the conveying direction of the pole piece 10 are respectively provided with a feed port 102 and a discharge port 103, the feed port 102 and the discharge port 103 are both in communication with the drying cavity 101, and the pole piece 10 is input into the drying cavity 101 through the feed port 102 and output out of the drying cavity 101 through the discharge port 103. That is, the pole piece 10 can be dried and conveyed, the pole piece 10 to be dried is input into the drying cavity 101 through the feeding port 102, and the dried pole piece 10 is output out of the drying cavity 101 through the discharging port 103.

Referring to fig. 1, the plurality of conveying rollers include a first roller body 210 and a second roller body 220 distributed on opposite sides of the drying chamber 101, the second roller body 220 and the first roller body 210 are respectively located on different sides of the pole piece 10 in the thickness direction, the first side of the pole piece 10 in the thickness direction contacts with the surface of the first roller body 210, and the second side of the pole piece 10 in the thickness direction is suspended relative to the surface of the second roller body 220.

It will be appreciated that the first side of the pole piece 10 in the thickness direction is not covered with the active material layer, and the second side of the pole piece 10 in the thickness direction is covered with the active material layer and needs to be dried, so that the first side of the pole piece 10 may be in contact with the surface of the first roller body 210 and the second side of the pole piece 10 may not be in contact with the surface of the second roller body 220 to prevent the active material layer from adhering to the surface of the second roller body 220.

In this embodiment, the first roller 210 and the second roller 220 are relatively distributed along the vertical direction (i.e. the Z direction shown in fig. 1). For example, as shown in fig. 1, the first roller 210 is disposed at the top side of the drying cavity 101, and the second roller 220 is disposed at the bottom side of the drying cavity 101, so that a height difference exists between the second roller 220 and the first roller 210, which is beneficial to storage and drying of the pole piece 10. In other embodiments, the first roller 210 and the second roller 220 may be relatively distributed along a horizontal direction (i.e. the X direction shown in fig. 1).

In this embodiment, the number of the first roller bodies 210 and the second roller bodies 220 is at least two, all the first roller bodies 210 and all the second roller bodies 220 are arranged side by side at intervals along the conveying direction of the pole piece 10, and the rotation speeds of all the first roller bodies 210 and all the second roller bodies 220 are the same, so as to realize uniform speed conveying of the pole piece 10. In other embodiments, all of the first roller bodies 210 and all of the second roller bodies 220 may also rotate at different speeds.

Further, referring to fig. 4, a plurality of air blowing openings 221 are uniformly distributed on the surface of the second roller 220, and the air blowing direction of all the air blowing openings 221 faces the pole piece 10.

The air outlet 221 is connected to an external air supply device, and air is blown to the pole piece 10 through the air outlet 221 by the external air supply device, so that the second side of the pole piece 10 is suspended relative to the surface of the second roller 220, so as to prevent the second side of the pole piece 10 from contacting the surface of the second roller 220.

In this embodiment, all the air blowing openings 221 are circular holes, and the diameters of the circular holes are equal, so as to facilitate uniform distribution of the air blowing flow. In other embodiments, all of the vents 221 may also be square holes or other shapes, and the sizes of all of the vents 221 may not be exactly equal.

Referring to fig. 1, at least one drying mechanism 300 is disposed between every two adjacent first roller bodies 210, and all the drying mechanisms 300 are located at one side of the first roller bodies 210.

Here, at least one drying mechanism 300 is disposed between every two adjacent first roller bodies 210, which can be understood as: one drying mechanism 300 is provided between every two adjacent first roller bodies 210, or at least two drying mechanisms 300 are provided. In this way, all the drying mechanisms 300 are located at the side where the first roller body 210 is located, so that the whole structure of the drying device is compact, and the drying efficiency of the pole piece 10 can be effectively improved.

Referring to fig. 1 and 2, the drying mechanism 300 includes a main body 310 and a drying air outlet 311 disposed in the main body 310, wherein the drying air outlet 311 is used for outputting hot air to dry the pole piece 10.

Specifically, the drying mechanism 300 further includes a fan and a drying air inlet 312, the drying air inlet 312 is disposed on the main body 310, and the fan is disposed inside the main body 310. When the blower is operated, hot air flows into the main body 310 from the drying air inlet 312 and is outputted from the drying air outlet 311.

In this embodiment, the number of the drying air outlets 311 and the drying air inlets 312 is not limited to one, i.e. at least two drying air outlets 311 or at least two drying air inlets 312 may be provided for each drying mechanism 300. Here, the number of the drying air outlet 311 and the drying air inlet 312 is not particularly limited.

In the present embodiment, the main body 310 may have a rectangular parallelepiped shape, a prismatic shape, or other shapes, and the shape of the main body 310 is not particularly limited herein.

Further, referring to fig. 1 and 2, the drying mechanism 300 is provided with two drying air outlets 311 along the conveying direction of the pole piece 10, and the air outlet direction of each drying air outlet 311 is disposed at an included angle with the pole piece 10.

It can be understood that, because the air outlet direction of the drying air outlet 311 is set at an included angle with the pole piece 10, the air flow output by the drying air outlet 311 can be ensured to be blown onto the pole piece 10 directly in a large range, which is beneficial to improving the drying efficiency of the pole piece 10.

Preferably, the included angle between the air outlet direction of each drying air outlet 311 and the pole piece 10 is 2 °. In this way, the air flow output by the drying air outlet 311 can be directly blown to the pole piece 10, and the air output is ensured.

Referring to fig. 1 and 2, the drying device further includes a guiding member 400, at least one guiding member 400 is disposed between every two adjacent first roller bodies 210, and a guiding channel 401 is disposed between an outer wall of the guiding member 400 and the pole piece 10 at intervals and is in communication with the drying air outlet 311.

It can be understood that the outer wall of the guide piece 400 and the pole piece 10 are arranged at intervals to form a long and narrow slit-shaped guide channel 401, and the hot air output by the drying air outlet 311 flows into the guide channel 401 under the guide action of the guide piece 400 and exchanges heat with the pole piece 10 to dry the pole piece 10, so that the contact area between the hot air and the pole piece 10 is increased, and the drying efficiency of the pole piece 10 is improved.

In this embodiment, the flow guiding member 400 may be a solid structure or a hollow structure, as long as the outer wall of the flow guiding member 400 and the pole piece 10 are disposed at intervals.

Referring to fig. 5 and 1, in the conveying direction of the pole piece 10, the outer edge of each guide piece 400 does not exceed the edge of the drying air outlet 311.

Here, the outer edge of each guide 400 does not exceed the edge of the drying air outlet 311, which can be understood as: the outermost side of the flow guiding piece 400 does not exceed the outermost side of the drying air outlet 311, so that the drying air outlet 311 is positioned between the outer wall of the flow guiding piece 400 and the pole piece 10, and the flow guiding channel 401 between the outer wall of the flow guiding piece 400 and the pole piece 10 plays a better role in guiding the hot air of the drying air outlet 311.

Further, referring to fig. 2, the drying apparatus further includes a first flow equalizing plate 500, and at least one first flow equalizing plate 500 is disposed in each drying air outlet 311.

It should be noted that, the first flow equalizing plate 500 is uniformly provided with a plurality of first flow equalizing holes, and the hot air in the drying air outlet 311 is uniformly output after passing through the first flow equalizing plate 500. All the first flow equalizing holes may be round holes, square holes or other shapes, and the shape of the first flow equalizing holes is not particularly limited.

Referring to fig. 3, the box 100 is further provided with a first air inlet 104 and a first air outlet 105 which are communicated with the drying air outlet 311, wherein the first air inlet 104 and the first air outlet 105 are located at one side of the box 100 along a first direction and have different height positions, and the first direction intersects with the conveying direction and the vertical direction of the pole piece 10.

The first direction is the Y direction shown in fig. 3. When the pole piece 10 needs to be dried, hot air is input from the first air inlet 104, a part of the hot air is blown out to the second side of the pole piece 10 through the drying air inlet 312 and the drying air outlet 311 of the drying mechanism 300 in sequence, the other part of the hot air directly enters the drying cavity 101, and all the hot air is discharged to the outside of the box 100 through the first air outlet 105. Thus, the drying effect and the drying efficiency of the pole piece 10 are improved.

In this embodiment, the first direction is perpendicular to both the conveying direction and the vertical direction of the pole piece 10. In other embodiments, the first direction may be disposed at an angle other than 90 degrees with respect to the conveying direction and the vertical direction of the pole piece 10.

Referring to fig. 4 and 5, the drying device includes a second flow equalizing plate 600 and a third flow equalizing plate 700, where the second flow equalizing plate 600 and the third flow equalizing plate 700 are disposed in the box 100 along a vertical direction at intervals, and divide the box 100 into an air inlet cavity 106, a drying cavity 101 and an air outlet cavity 107, the first air inlet 104 is located in the air inlet cavity 106, and the first air outlet 105 is located in the air outlet cavity 107.

It should be noted that, the second flow equalizing plate 600 is uniformly provided with a plurality of second flow equalizing holes 601, and the third flow equalizing plate 700 is uniformly provided with a plurality of third flow equalizing holes 701. When the pole piece 10 needs to be dried, hot air is input from the first air inlet 104, a part of the hot air is blown out to the second side of the pole piece 10 through the air inlet cavity 106, the second flow equalizing hole 601, the drying air inlet 312 and the drying air outlet 311 in sequence, and the other part of the hot air enters the drying cavity 101 through the air inlet cavity 106 and the second flow equalizing hole 601 in sequence, and all the hot air is discharged to the outside of the box body 100 through the third flow equalizing hole 701 and the first air outlet 105. Through the arrangement, the air inlet cavity 106, the drying cavity 101 and the air outlet cavity 107 are sequentially arranged along the vertical direction, and all hot air flows from top to bottom, so that the hot air is uniformly distributed.

In this embodiment, the second flow equalizing hole 601 and the third flow equalizing hole 701 may be round holes, square holes or other shapes, and the shapes of the second flow equalizing hole 601 and the third flow equalizing hole 701 are not particularly limited.

In this embodiment, the second flow equalizing plate 600 and the third flow equalizing plate 700 are fixed to the inner wall of the case 100 by welding or riveting. In other embodiments, the second flow equalizing plate 600, the third flow equalizing plate 700 and the case 100 may be integrally formed.

In this embodiment, the air inlet chamber 106, the drying chamber 101 and the air outlet chamber 107 are all rectangular cavities. In other embodiments, the air inlet chamber 106, the drying chamber 101 and the air outlet chamber 107 may be cylindrical or have other shapes, and the shapes of the air inlet chamber 106, the drying chamber 101 and the air outlet chamber 107 are not particularly limited.

Referring to fig. 5, the drying device further includes a plurality of flow dividing sheets 800, and the plurality of flow dividing sheets 800 are disposed in the air inlet cavity 106 at intervals and form a flow dividing channel 801, and the flow dividing channel 801 is communicated with the first air inlet 104 and the drying cavity 101.

It can be appreciated that when the pole piece 10 needs to be dried, hot air is input from the first air inlet 104, the hot air in the air inlet cavity 106 is split through the split channel 801, a part of hot air can be uniformly distributed into each drying air inlet 312 through the split channel 801 in sequence through the second flow equalizing holes 601, and another part of hot air can enter the drying cavity 101 through the second flow equalizing holes 601.

In this embodiment, the splitter 800 and the case 100 are in a split structure, and the splitter 800 and the case 100 are fixed by welding or riveting. In other embodiments, the splitter 800 and the case 100 may also be a unitary structure.

Specifically, referring to fig. 5, each of the splitter blades 800 has an L-shape, the head of each splitter blade 800 is disposed at a distance from the first air inlet 104, and the tail of each splitter blade 800 is disposed at a distance from the edge of the air inlet cavity 106.

It should be noted that, at least one drying mechanism 300 is disposed between every two adjacent first roller bodies 210, and each drying mechanism 300 is disposed at intervals along the X direction shown in fig. 5, and by disposing the tail portion of each splitter 800 at intervals at the edge of the air inlet cavity 106, the hot air entering the air inlet cavity 106 can be guided to each drying air inlet 312 by the splitter 800.

In other embodiments, each of the splitter 800 can also be C-shaped or otherwise shaped.

More specifically, referring to fig. 4, the air intake cavity 106 includes two first sidewalls 106a disposed opposite to each other along the conveying direction of the pole piece 10; in the first direction, the two first side walls 106a taper from one end close to the first air inlet 104 to one end far from the first air inlet 104.

Here, in the first direction, the two first side walls 106a are in a tapered structure from one end close to the first air inlet 104 to one end far away from the first air inlet 104, so that the flow velocity of the hot air in the area, far from the first air inlet 104, in the air inlet cavity 106 can be increased, and the uniformity of the airflow in the whole air inlet cavity 106 is increased.

Referring to fig. 1, a pole piece processing system in an embodiment includes the above-mentioned drying device.

It should be noted that, the pole piece processing system includes the drying device, and further includes other components such as a pole piece 10 coating device and a pole piece 10 shaping device.

The pole piece processing system comprises the pole piece 10, a drying device and a drying mechanism 300, wherein the pole piece 10 is wound on each conveying roller in a reciprocating mode, the drying device can enable the pole piece 10 with a certain length to be stored in the drying cavity 101, and the pole piece 10 is dried through the drying mechanism 300 in the drying cavity 101, so that the whole structure of the drying device is compact and the drying effect is good.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims (10)

1. A drying device for drying pole pieces (10), characterized in that the drying device comprises:

a drying cavity (101) is arranged in the box body (100);

the conveying mechanism (200) is arranged in the drying cavity (101) and is provided with a plurality of conveying rollers, the conveying rollers are distributed on two opposite sides of the drying cavity (101) in a staggered manner along the conveying direction of the pole piece (10), and the pole piece (10) is wound on the conveying rollers in a reciprocating manner;

and the drying mechanism (300) is arranged in the drying cavity (101) and is used for drying the pole piece (10).

2. The drying apparatus according to claim 1, wherein the plurality of conveying rollers includes first and second roller bodies (210, 220) distributed on opposite sides of the drying chamber (101), the second roller body (220) and the first roller body (210) being located on different sides of the pole piece (10) in a thickness direction, respectively, the first side of the pole piece (10) in the thickness direction being in contact with a surface of the first roller body (210), the second side of the pole piece (10) in the thickness direction being suspended with respect to the surface of the second roller body (220);

a plurality of air blowing openings (221) are uniformly distributed on the surface of the second roller body (220), and the air blowing directions of all the air blowing openings (221) face the pole piece (10).

3. The drying device according to claim 2, wherein the drying mechanism (300) comprises a main body (310) and a drying air outlet (311) arranged on the main body (310), and the drying air outlet (311) is used for outputting hot air to dry the pole piece (10);

the drying mechanism (300) is provided with two drying air outlets (311) along the conveying direction of the pole piece (10), and the air outlet direction of each drying air outlet (311) is arranged at an included angle with the pole piece (10).

4. A drying apparatus according to claim 3, further comprising a flow guiding member (400), at least one flow guiding member (400) being disposed between each two adjacent first roller bodies (210), and a flow guiding channel (401) being disposed between an outer wall of the flow guiding member (400) and the pole piece (10) at an interval and being in communication with the drying air outlet (311).

5. A drying apparatus according to claim 3, wherein the box (100) is further provided with a first air inlet (104) and a first air outlet (105) which are communicated with the drying air outlet (311), the first air inlet (104) and the first air outlet (105) are located at one side of the box (100) along a first direction and have different height positions, and the first direction intersects with the conveying direction and the vertical direction of the pole piece (10).

6. The drying device according to claim 5, wherein the drying device comprises a first flow equalizing plate (500), a second flow equalizing plate (600) and a third flow equalizing plate (700), the second flow equalizing plate (600) and the third flow equalizing plate (700) are arranged in the box body (100) at intervals along the vertical direction, the box body (100) is divided into an air inlet cavity (106), a drying cavity (101) and an air outlet cavity (107), the first air inlet (104) is positioned in the air inlet cavity (106), the first air outlet (105) is positioned in the air outlet cavity (107), and at least one first flow equalizing plate (500) is arranged in each drying air outlet (311).

7. The drying apparatus according to claim 6, further comprising a plurality of flow dividing sheets (800), wherein a plurality of the flow dividing sheets (800) are disposed in the air intake chamber (106) at intervals and form a flow dividing channel (801), and the flow dividing channel (801) is in communication with the first air intake (104) and the drying chamber (101).

8. The drying apparatus according to claim 7, wherein each of the flow dividing plates (800) has an L-shape, a head portion of each of the flow dividing plates (800) is disposed at an interval to the first air inlet (104), and a tail portion of each of the flow dividing plates (800) is disposed at an interval to an edge of the air inlet chamber (106).

9. The drying apparatus according to claim 6, wherein the air intake chamber (106) comprises two first side walls (106 a) disposed opposite each other along the conveying direction of the pole pieces (10); in the first direction, the two first side walls (106 a) are in a tapered structure from one end close to the first air inlet (104) to one end far away from the first air inlet (104).

10. A pole piece processing system comprising a drying apparatus as claimed in any one of claims 1 to 9.