A drying system for a lithium-ion battery pole coating machine

Abstract

The present invention provides a drying system for a lithium-ion battery pole piece coating machine, which belongs to the field of lithium-ion battery pole piece processing. The system comprises a belt conveyor composed of a conveying surface and a fixed portion. The conveying surface is evenly provided with placement frames for tilted placement of the battery pole pieces. The upper end of the fixed portion of the belt conveyor is provided with a drying box. The present invention utilizes abutments to perform distributed multi-point contact on the battery pole pieces, so that the front and back sides of the battery pole pieces are exposed to the greatest extent and the exposure degree of both sides is the same, thereby avoiding the battery pole piece having an excessively large contact area on one side, which results in different drying speeds and drying degrees on the front and back sides. The surface of the tilted battery pole piece is more susceptible to drying, so that the heat inside the drying box fully acts on the battery pole piece, thereby improving the overall drying efficiency and drying uniformity of the battery pole piece.

Description

Technical Field

[0001] The present invention relates to the field of lithium-ion battery pole piece processing, and in particular to a drying system for a lithium-ion battery pole piece coating machine. Background Art

[0002] Lithium-ion battery electrodes refer to the positive and negative electrodes in lithium-ion batteries. They are one of the most critical components of the battery, providing electrical conductivity, insulation, resistance to lateral flow, reducing battery pack capacity loss, and improving battery safety. The manufacturing process for lithium-ion battery electrodes can be divided into slurry preparation, slurry coating, electrode rolling, slicing, and drying. The drying process is designed to evaporate the moisture within the battery electrode to a certain degree of dryness, thereby effectively ensuring the quality of the battery electrode and improving the battery's lifespan and performance.

[0003] However, the following problems still exist in the drying process of common lithium-ion battery electrodes after coating: (1) The battery electrodes after slicing are usually placed directly on a conveyor belt and then transported to a drying box for hot air drying. However, the contact area between the bottom of the battery electrode and the conveyor belt is large, which can easily lead to inconsistent drying speeds on the upper and lower surfaces of the battery electrode; (2) At the same time, the direction of hot air blowing is fixed, and the drying speed of the battery electrode close to the heat source is faster than that of other parts, and the overall drying uniformity of the battery electrode per unit time is low. Summary of the Invention

[0004] The present invention provides a drying system for a lithium-ion battery pole piece coater to solve the problems existing in the drying process of lithium-ion battery pole pieces in the above-mentioned related art.

[0005] The present invention provides a drying system for a lithium-ion battery pole piece coating machine, comprising a belt conveyor consisting of a conveying surface and a fixed part, wherein placement frames for obliquely placing battery pole pieces are evenly arranged on the conveying surface, and a drying box is provided at the upper end of the fixed part of the belt conveyor.

[0006] The upper end of the conveying surface is equipped with a fixed plate evenly arranged from left to right, and the fixed plate consists of a horizontal section and an inclined section. The horizontal section of the fixed plate is connected to the conveying surface, and the inclined section of the fixed plate is provided with a placement frame parallel to it. The placement frame includes an upper return frame and a lower return frame, and the lower return frame is fixedly connected to the inclined section of the fixed plate. A cavity is provided inside the upper return frame and the lower return frame, and a rectangular and hollow connecting frame is connected between the upper return frame and the lower return frame. Connecting tubes with equal distances and even distribution are installed between adjacent connecting frames, and the connecting tubes are perpendicular to the connecting frames. Ventilation holes are distributed on the surfaces of the upper return frame, the lower return frame, the connecting frame and the connecting tube are connected to each other, and a grid plate is installed in the lower return frame.

[0007] A push rod connected to the connecting cylinder is installed on the side close to the front and rear connecting cylinders. The push rods are evenly arranged along the axis of the connecting cylinder, and the outer ring surface of the push rods is provided with evenly arranged connecting holes.

[0008] In one possible implementation, an inclined bevel gear is installed at the center of one end of the grid plate close to the conveying surface through a fixed shaft. The fixed shaft passes through the inclined section of the fixed plate and is rotatably connected thereto. The lower end of the inclined bevel gear is engaged with a horizontal bevel gear. The lower end of the horizontal bevel gear is connected to a transmission gear through a connecting shaft. The connecting shaft is rotatably mounted on the upper end of the mounting plate. The mounting plate is fixedly mounted on the conveying surface. A rack is installed on the lower side of the inner wall at the rear end of the drying box. When the transmission gear moves to the drying box, the transmission gear and the rack are engaged.

[0009] In one possible implementation, the upper end of the connecting frame is fixedly connected to the upper return frame, and the lower end of the connecting frame is slidingly connected to the lower return frame. Two diagonally distributed threaded rods are also connected between the upper return frame and the lower return frame. The threaded rods are rotationally connected to the lower return frame, and the threaded rods are threadedly connected to the upper return frame.

[0010] In one possible implementation, the ends of the front and rear push rods that are close to each other are both equipped with balls through ball hinges, and the distance between the left and right connecting cylinders is greater than the width of the battery electrode.

[0011] In a possible implementation, the ends of the left and right connecting cylinders that are close to each other and the end of the grid plate that is away from the conveying surface are connected to a buffer plate through a compression spring, and the surface of the buffer plate is provided with evenly distributed square holes.

[0012] In one possible implementation, dryers with several drying heads are installed on the front and rear inner walls of the drying box. The drying heads on the front dryers are tilted toward the front and downward and perpendicular to the inclined section of the fixed plate, and the drying heads on the rear dryers are tilted toward the rear and downward and parallel to the inclined section of the fixed plate.

[0013] In one possible implementation, the upper end of the drying box is provided with an inverted shaped plate, and the upper end surface of the drying box is provided with two left-right symmetrical grooves. The vertical section of the inverted shaped plate is slidably installed in the corresponding groove, and an electric push rod is connected between the inner side of the horizontal section of the inverted shaped plate and the upper end surface of the drying box.

[0014] Beneficial effects of the present invention:

[0015] 1. A lithium-ion battery electrode coating machine drying system provided according to an embodiment of the present invention utilizes a push rod to perform distributed multi-point contact on the battery electrode, so that the front and back sides of the battery electrode are exposed to the maximum extent and the exposure degree of both sides is the same, thereby avoiding the battery electrode having too large a single-sided contact area, resulting in different drying speeds and drying degrees on the front and back sides.

[0016] 2. According to an embodiment of the present invention, a drying system for a lithium-ion battery electrode coating machine is provided. The surface of the tilted battery electrode is more susceptible to drying. The ventilation holes, connecting holes, and the interconnected upper return frame, lower return frame, connecting cylinder, and connecting frame achieve the dual functions of expanding the range of hot air circulation and reducing the degree of obstruction of the battery electrode. The hot air can also be blown toward the battery electrode from the ventilation holes and connecting holes, thereby allowing the hot air inside the drying box to fully act on the battery electrode, thereby improving the overall drying efficiency and drying uniformity of the battery electrode.

[0017] 3. According to an embodiment of the present invention, a drying system for a lithium-ion battery electrode coating machine is provided. The battery electrodes placed in the frame rotate continuously inside the drying box to ensure that all surfaces of the battery electrodes can be dried continuously and to the same degree. The rotation of the placement frame is used to accelerate the flow of hot air around the battery electrodes, so that the hot air can more fully and evenly dry the entire battery electrode, further improving the drying speed and uniformity. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The present invention provides a three-dimensional structural diagram of a drying system for a lithium-ion battery electrode coating machine.

[0019] Figure 2 This invention Figure 1 Schematic diagram of the right view structure.

[0020] Figure 3 This invention Figure 2 AA section structural diagram.

[0021] Figure 4 It is a schematic diagram of the three-dimensional structure inside a drying box of a drying system for a lithium-ion battery electrode coating machine provided by an embodiment of the present invention.

[0022] Figure 5 The present invention provides a schematic diagram of the three-dimensional structure of a placement frame of a drying system for a lithium-ion battery electrode coating machine.

[0023] Figure 6 It is a left-side structural schematic diagram of a placement frame of a drying system for a lithium-ion battery pole piece coating machine provided by an embodiment of the present invention.

[0024] Figure 7 This invention Figure 6 BB-direction cross-sectional structural diagram.

[0025] Figure 8 The present invention provides a schematic top view of a placement frame of a drying system for a lithium-ion battery electrode coating machine.

[0026] Figure 9 This invention Figure 8 Schematic diagram of the CC-direction cross-sectional structure.

[0027] Figure 10 This invention Figure 6 Schematic diagram of the enlarged structure of the D area in the middle.

[0028] Figure 11 The present invention provides a schematic diagram of the three-dimensional structure of a grid plate, a buffer plate and a compression spring of a drying system for a lithium-ion battery electrode coating machine.

[0029] In the figure: 1. Belt conveyor; 11. Conveying surface; 12. Fixing plate; 13. Rack; 14. Mounting plate; 2. Placement frame; 21. Upper return frame; 212. Threaded rod; 22. Lower return frame; 23. Vent; 24. Connecting cylinder; 25. Grid plate; 251. Buffer plate; 252. Square hole; 253. Compression spring; 26. Connecting frame; 261. Connecting hole; 27. Push rod; 271. Ball bearing; 28. Inclined bevel gear; 281. Horizontal bevel gear; 29. ​​Transmission gear; 3. Drying box; 31. Dryer; 32. Drying head; 33. Inverted plate; 34. Electric push rod; 4. Battery electrode. DETAILED DESCRIPTION

[0030] To make the above-mentioned objects, features, and advantages of the present invention more readily apparent, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings. The following description sets forth numerous specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described below, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0031] See also Figure 1 A lithium-ion battery electrode coating machine drying system includes a belt conveyor 1 consisting of a conveying surface 11 and a fixed part, and a placement frame 2 for obliquely placing battery electrodes is evenly arranged on the conveying surface 11. A drying box 3 is provided at the upper end of the fixed part of the belt conveyor 1.

[0032] See also Figure 1 、 Figure 4 、 Figure 5 、 Figure 6 and Figure 11, the upper end of the conveying surface 11 is equipped with a fixed plate 12 evenly arranged from left to right, the fixed plate 12 consists of a horizontal section and an inclined section, the horizontal section of the fixed plate 12 is connected to the conveying surface 11, and the inclined section of the fixed plate 12 is provided with a placement frame 2 parallel thereto, the placement frame 2 includes an upper return frame 21 and a lower return frame 22, the lower return frame 22 is fixedly connected to the inclined section of the fixed plate 12, and a cavity is provided inside the upper return frame 21 and the lower return frame 22, and a rectangularly distributed and hollow connecting frame 26 is connected between the upper return frame 21 and the lower return frame 22, and equidistant and evenly distributed connecting cylinders 24 are installed between adjacent connecting frames 26, such as Figure 5 As shown, the front-to-back bidirectional connecting tube 24 and the left-to-right bidirectional connecting tube 24 only differ in diameter. The connecting tube 24 is perpendicular to the connecting frame 26. The upper return frame 21, the lower return frame 22, the connecting frame 26 and the connecting tube 24 are all covered with ventilation holes 23 on their surfaces. The upper return frame 21, the lower return frame 22, the connecting frame 26 and the connecting tube 24 are interconnected, and a grid plate 25 is installed in the lower return frame 22.

[0033] See also Figure 7 、 Figure 9 and Figure 10 The sides of the front and rear connecting tubes 24 that are close to each other are each installed with a push rod 27 that is connected to the connecting tube 24. The push rod 27 is evenly arranged along the axis of the connecting tube 24, and the outer ring surface of the push rod 27 is provided with evenly arranged connecting holes 261.

[0034] First, insert the battery electrode 4 from the upper return frame 21 to the lower return frame 22 between the front and rear connected cylinders 24, and the end of the push rod 27 contacts the surface of the battery electrode 4. At this time, the battery electrode 4 is in an inclined semi-suspended state. The push rod 27 is used to perform distributed multi-point contact on the battery electrode 4, so that the front and back sides of the battery electrode 4 are exposed to the greatest extent and the exposure degree of both sides is the same, avoiding the battery electrode 4. The contact area on one side is too large, resulting in different drying speeds and drying degrees on the front and back. After the battery electrode 4 is placed, the placement frame 2 carrying the battery electrode 4 is transported to the inside of the drying box 3 by the belt conveyor 1. Then, the drying box 3 dries the tilted battery pole pieces 4. The surfaces of the tilted battery pole pieces 4 are more susceptible to drying. The ventilation holes 23 and the connecting holes 261, as well as the upper return frame 21, the lower return frame 22, the connecting cylinder 24 and the connecting frame 26 that are interconnected, achieve the dual functions of expanding the range of hot air circulation and reducing the degree of obstruction of the battery pole pieces 4. The hot air can also be blown toward the battery pole pieces 4 from the ventilation holes 23 and the connecting holes 261, thereby allowing the hot air inside the drying box 3 to fully act on the battery pole pieces 4, thereby improving the overall drying efficiency and drying uniformity of the battery pole pieces 4.

[0035] See also Figure 4 、 Figure 5 and Figure 6 The center of one end of the grid plate 25 close to the conveying surface 11 is equipped with an inclined bevel gear 28 through a fixed shaft. The fixed shaft passes through the inclined section of the fixed plate 12 and is rotatably connected thereto. The lower end of the inclined bevel gear 28 is meshed with a horizontal bevel gear 281. The lower end of the horizontal bevel gear 281 is connected to a transmission gear 29 through a connecting shaft. The connecting shaft is rotatably mounted on the upper end of the mounting plate 14. The mounting plate 14 is fixedly mounted on the conveying surface 11. A rack 13 is mounted on the lower side of the inner wall at the rear end of the drying box 3. When the transmission gear 29 moves to the drying box 3, the transmission gear 29 is meshed with the rack 13.

[0036] When the placement frame 2 as a whole enters the interior of the drying box 3, the transmission gear 29 that moves with the conveying surface 11 engages with the rack 13 and the transmission gear 29 rotates, thereby causing the horizontal bevel gear 281 to drive the inclined bevel gear 28 to rotate. The inclined bevel gear 28 drives the placement frame 2 as a whole to rotate through the fixed axis, and the placement frame 2 rotates in its inclined direction, and then the battery electrodes 4 in the placement frame 2 continue to rotate inside the drying box, ensuring that all surfaces of the battery electrodes 4 can be dried continuously and to the same degree, and the rotation of the placement frame 2 is used to accelerate the flow of hot air around the battery electrodes 4, so that the hot air can more fully and evenly dry the battery electrodes 4 as a whole, further improving the drying speed and uniformity.

[0037] See also Figure 4 、 Figure 5 and Figure 8 The upper end of the connecting frame 26 is fixedly connected to the upper return frame 21, and the lower end of the connecting frame 26 is slidingly connected to the lower return frame 22. Two diagonally distributed threaded rods 212 are also connected between the upper return frame 21 and the lower return frame 22. The threaded rod 212 is rotationally connected to the lower return frame 22, and the threaded rod 212 is threadedly connected to the upper return frame 21.

[0038] When placing battery pole pieces 4 of different lengths, the threaded rod 212 can be rotated to allow the upper return frame 21 to drive the connecting frame 26 and the connecting tube 24 to move as a whole toward the direction of the lower return frame 22. The threaded rod 212 and the lower return frame 22 guide and limit the upper return frame 21, so as to adjust the distance between the upper return frame 21 and the lower return frame 22 according to the length of the battery pole piece 4, so that the contact points of the support rod 27 on the surface of the battery pole piece 4 are evenly distributed, thereby making the inclined battery pole piece 4 evenly stressed during rotation.

[0039] See also Figure 9 and Figure 10The adjacent ends of the front and rear push rods 27 are each fitted with a ball bearing 271 via a ball joint. The distance between the left and right connecting cylinders 24 is greater than the width of the battery electrode 4. On the one hand, the ball bearing 271 makes point contact with the surface of the battery electrode 4, further reducing the clamping area of ​​the battery electrode 4 and increasing the exposure of the battery electrode 4. On the other hand, the fact that the distance between the left and right connecting cylinders 24 is greater than the width of the battery electrode 4 allows the battery electrode 4 to undergo linear reciprocating movement perpendicular to the left and right connecting cylinders 24 during rotation with the placement frame 2. This in turn changes the position of the contact point between the ball bearing 271 and the surface of the battery electrode 4, exposing previously contacted locations on the battery electrode 4 for drying. This ensures that every location on the surface of the battery electrode 4 is dried. The rolling friction generated between the ball bearing 271 and the battery electrode 4 helps reduce the resistance to movement of the battery electrode 4 and prevents wear on the surface of the battery electrode 4.

[0040] See also Figure 7 、 Figure 8 and Figure 11 The ends of the left and right connecting cylinders 24 that are close to each other and the end of the grid plate 25 that is away from the conveying surface 11 are connected to a buffer plate 251 through a compression spring 253. The surface of the buffer plate 251 is provided with evenly distributed square holes 252.

[0041] During the process of the battery pole piece 4 rotating synchronously with the placement frame 2 and moving linearly synchronously, the buffer plate 251 is used to buffer and reduce shock on the battery pole piece 4, protect the side of the battery pole piece 4, and avoid rigid collision deformation of the battery pole piece 4. The square hole 252 is set to ensure that the buffer plate 251 protects the battery pole piece 4 while avoiding interference with the circulation of hot air.

[0042] See also Figure 2 、 Figure 3 and Figure 4 The front and rear inner walls of the drying box 3 are both equipped with dryers 31 with several drying heads 32. The drying heads 32 on the front dryer 31 are tilted toward the front and downward and perpendicular to the inclined section of the fixed plate 12. The drying heads 32 on the rear dryer 31 are tilted toward the rear and downward and parallel to the inclined section of the fixed plate 12.

[0043] After the battery electrodes 4 enter the drying box 3, the dryer 31 starts working, and the drying head 32 tilted toward the front and bottom and the drying head 32 tilted toward the rear and bottom dry the battery electrodes 4 from two directions, ensuring that the hot air flows fully in the placement frame 2, so that the battery electrodes 4 are evenly and fully affected by the hot air, thereby improving the overall drying efficiency and effect of the battery electrodes 4.

[0044] See also Figure 1 、 Figure 2 and Figure 3The upper end of the drying box 3 is provided with an inverted plate 33, and the upper end surface of the drying box 3 is provided with two left-right symmetrical grooves. The vertical section of the inverted plate 33 is slidably installed in the corresponding groove, and an electric push rod 34 is connected between the inner side of the horizontal section of the inverted plate 33 and the upper end surface of the drying box 3.

[0045] When a single battery electrode sheet 4 is moved into the drying box 3, the electric push rod 34 pushes the inverted plate 33 downward to close the left and right sides of the drying box 3, allowing the battery electrode sheet 4 to be dried in a closed state. After drying is completed, when the next battery electrode sheet 4 needs to be dried, the electric push rod 34 pushes the inverted plate 33 upward to open the drying box 3. The dried battery electrode sheet 4 continues to be transported to the right, while the undried battery electrode sheet 4 enters the drying box 3. The intermittently closed drying box 3 allows the battery electrode sheet 4 to be fully surrounded by hot air while being dried inside the drying box 3, avoiding the drying box 3 being in a semi-open state, which would cause the internal temperature to change and reduce the drying effect of the hot air on the battery electrode sheet 4.

[0046] The working principle of the present invention is as follows: first, the battery electrode 4 is inserted from the upper return frame 21 to the lower return frame 22 between the front and rear arranged connecting tubes 24, and the end of the push rod 27 contacts the surface of the battery electrode 4. At this time, the battery electrode 4 is in an inclined semi-suspended state, and the push rod 27 is used to perform distributed multi-point contact on the battery electrode 4, so that the front and back sides of the battery electrode 4 are exposed to the maximum extent and the exposure degree of both sides is the same. After the battery electrode 4 is placed, the placement frame 2 carrying the battery electrode 4 is transported to the inside of the drying box 3 through the belt conveyor 1. When the placement frame 2 enters the inside of the drying box 3 as a whole, the transmission gear 29 moving with the conveying surface 11 engages with the rack 13 and the transmission gear 29 rotates, thereby causing the horizontal bevel gear 281 to drive the inclined bevel gear 28 to rotate. The inclined bevel gear 28 drives the placement frame 2 to rotate as a whole through the fixed shaft, and the placement frame 2 rotates in its inclined direction. , and then the battery plates 4 in the placement frame 2 continue to rotate inside the drying box. After the battery plates 4 enter the drying box 3, the dryer 31 starts working, and the drying head 32 tilted forward and downward and the drying head 32 tilted rearward and downward dry the battery plates 4 from two directions to ensure that the hot air flows fully in the placement frame 2. In the process of the battery plates 4 rotating synchronously with the placement frame 2 and moving linearly synchronously, the buffer plate 251 is used to buffer and reduce shock to the battery plates 4. When a single battery plate 4 moves into the drying box 3, the electric push rod 34 pushes the inverted plate 33 downward to close the left and right sides of the drying box 3. After the drying is completed, when the next battery plate 4 needs to be dried, the electric push rod 34 pushes the inverted plate 33 upward to open the drying box 3. The dried battery plates 4 continue to be transported to the right, while the undried battery plates 4 enter the drying box 3.

[0047] In the embodiments of the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, a first feature being "above," "above," or "above" a second feature may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. A first feature being "below," "below," or "below" a second feature may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0048] In the description of the present invention, it should also be noted that, unless otherwise expressly specified or limited, the terms "disposed," "connected," "installed," and "connected" should be understood in a broad sense. For example, they may refer to fixed or detachable connections, integral or sliding connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0049] The embodiments of this specific implementation method are all preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. A drying system for a lithium-ion battery electrode coating machine, comprising a belt conveyor consisting of a conveying surface and a fixed portion, wherein placement frames for tilted placement of battery electrode sheets are evenly arranged on the conveying surface, and a drying box is provided at the upper end of the fixed portion of the belt conveyor; The upper end of the conveying surface is equipped with a fixed plate evenly arranged from left to right, and the fixed plate consists of a horizontal section and an inclined section. The horizontal section of the fixed plate is connected to the conveying surface, and the inclined section of the fixed plate is provided with a placement frame parallel to it. The placement frame includes an upper return frame and a lower return frame, and the lower return frame is fixedly connected to the inclined section of the fixed plate. A cavity is opened inside the upper return frame and the lower return frame, and a rectangular and hollow connecting frame is connected between the upper return frame and the lower return frame. Connecting tubes with equal distances and even distribution are installed between adjacent connecting frames, and the connecting tubes are perpendicular to the connecting frame. Ventilation holes are evenly distributed on the surfaces of the upper return frame, the lower return frame, the connecting frame and the connecting tube, and the upper return frame, the lower return frame, the connecting frame and the connecting tube are connected to each other, and a grid plate is installed in the lower return frame; Abutment rods communicating with the connecting cylinders are installed on the adjacent sides of the front and rear connecting cylinders. The abutment rods are evenly arranged along the axis of the connecting cylinders, and the outer annular surfaces of the abutment rods are provided with evenly arranged communication holes. The center of one end of the grid plate close to the conveying surface is equipped with an inclined bevel gear through a fixed shaft, the fixed shaft passes through the inclined section of the fixed plate and is rotatably connected thereto, the lower end of the inclined bevel gear is meshed with a horizontal bevel gear, the lower end of the horizontal bevel gear is connected to a transmission gear through a connecting shaft, the connecting shaft is rotatably mounted on the upper end of the mounting plate, the mounting plate is fixedly mounted on the conveying surface, and a rack is installed on the lower side of the inner wall of the rear end of the drying box; The upper end of the connecting frame is fixedly connected to the upper return frame, and the lower end of the connecting frame is slidably connected to the lower return frame. Two diagonally distributed threaded rods are further connected between the upper return frame and the lower return frame, and the threaded rods are rotatably connected to the lower return frame. The upper end of the drying box is provided with an inverted shaped plate, and the upper end surface of the drying box is provided with two left-right symmetrical grooves, and the vertical sections of the inverted shaped plate are slidably installed in the corresponding grooves.

2. The drying system for a lithium-ion battery pole piece coating machine according to claim 1, characterized in that: When the transmission gear moves to the drying box, the transmission gear and the rack are meshed.

3. The drying system for a lithium-ion battery pole piece coating machine according to claim 1, characterized in that: The threaded rod is threadedly connected to the upper return frame.

4. The drying system for a lithium-ion battery pole piece coating machine according to claim 1, characterized in that: The ends of the front and rear push rods that are close to each other are both equipped with balls through ball hinges, and the distance between the left and right connecting cylinders is greater than the width of the battery pole piece.

5. The drying system for a lithium-ion battery pole piece coating machine according to claim 1, characterized in that: The ends of the left and right connecting cylinders that are close to each other and the end of the grid plate that is away from the conveying surface are both connected to a buffer plate through a compression spring, and the surface of the buffer plate is provided with evenly arranged square holes.

6. The drying system for a lithium-ion battery pole piece coating machine according to claim 1, characterized in that: The front and rear inner walls of the drying box are both equipped with dryers with several drying heads. The drying heads on the front dryers are tilted forward and downward and perpendicular to the inclined section of the fixed plate, and the drying heads on the rear dryers are tilted backward and downward and parallel to the inclined section of the fixed plate.

7. The drying system for a lithium-ion battery pole piece coating machine according to claim 1, characterized in that: An electric push rod is connected between the inner side of the horizontal section of the inverted profile plate and the upper end surface of the drying box.

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