Lithium battery pole piece coating device

Abstract

The utility model relates to the technical field of battery processing equipment, and discloses a lithium battery pole piece coating device which comprises a conveyor, the inner wall of the conveyor is rotatably connected with a plurality of conveying rollers, the left side and the right side of the inner wall of the conveyor are both fixedly connected with guide plates, the left sides of the outer walls of the two guide plates are both provided with first sliding grooves, and the first sliding grooves are provided with second sliding grooves. And the inner walls of the multiple first sliding grooves are slidably connected with limiting blocks correspondingly, the left side and the right side of the inner wall of the conveyor are rotationally connected with two-way threaded rods correspondingly, the two two-way threaded rods are in threaded connection with the corresponding limiting blocks correspondingly, and the adjacent sides of the multiple limiting blocks are rotationally connected with rolling wheels correspondingly. According to the utility model, the two-way threaded rod is rotated to drive the limiting block and the roller to adjust the position, so that the coating base material is limited from two sides, the deviation of the base material caused by the rotation of the rotating roller during unwinding is avoided, and then the conveyor is started to stably convey the base material, so that the deviation of the pole piece base material caused by the rotation of the rotating roller during unwinding is prevented.

Description

Technical Field

[0001] This utility model relates to the field of battery processing equipment technology, and in particular to a lithium battery electrode coating device. Background Technology

[0002] Currently, lithium-ion batteries are pursuing high capacity and high rate performance, and the lithium-ion battery market is showing an explosive growth trend, which puts forward higher requirements for lithium-ion battery production capacity. At present, in order to meet the needs of performance and production capacity, the coating speed and coating density of lithium-ion battery electrode materials are increasing, so a lithium battery electrode coating device is needed.

[0003] Traditional lithium battery electrode coating equipment uses a coating head to uniformly coat the slurry onto the electrode substrate. Common coating methods include blade coating and slot coating, which are used for different structures. However, because the coating head cannot be precisely adjusted, it is difficult to meet the high precision and high consistency requirements of high-performance lithium batteries for electrode coatings, and uneven thickness is prone to occur. Existing technology can control the gap between the coating head and the electrode by adding a mechanism to adjust the coating head, thereby achieving precise control of the coating thickness. However, in actual use, the rotation of the rotating roller during unwinding causes the electrode substrate to shift, resulting in inaccurate coating position, affecting product quality and reducing the practicality of the equipment. Utility Model Content

[0004] To overcome the above deficiencies, this utility model provides a lithium battery electrode coating device, which aims to improve the problem in the prior art where the rotating roller causes the electrode substrate to shift during unwinding, resulting in inaccurate coating position and affecting product quality.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a lithium battery electrode coating device, comprising a conveyor, wherein multiple conveying rollers are rotatably connected to the inner wall of the conveyor, guide plates are fixedly connected to the left and right sides of the inner wall of the conveyor, and a first groove is formed on the left side of the outer wall of each of the two guide plates, and a limit block is slidably connected to the inner wall of each of the multiple first grooves, and a bidirectional threaded rod is rotatably connected to the left and right sides of the inner wall of the conveyor, and the two bidirectional threaded rods are respectively threadedly connected to the corresponding limit blocks, and a roller is rotatably connected to the adjacent side of each of the multiple limit blocks, a second groove is formed in the middle of the front and rear sides of the inner wall of the conveyor, and a coating head is slidably connected between adjacent second grooves, an installation plate is fixedly connected to the left side of the inner wall of the conveyor, and a telescopic rod is fixedly connected to the right side of the outer wall of the installation plate, the right end of the telescopic rod being fixedly connected to the installation plate, a coating substrate is slidably connected to the outer wall of the conveying rollers, and a heat recovery mechanism is provided on the top right side of the conveyor to reduce energy consumption.

[0006] As a further description of the above technical solution:

[0007] The heat recovery mechanism includes an upper insulation box, which is fixedly connected to the top right side of the outer wall of the conveyor. A lower insulation box is fixedly connected to the bottom right side of the outer wall of the conveyor. A ventilation plate is fixedly connected to the inner wall of the upper insulation box. A heating wire is fixedly connected to the bottom of the inner wall of the upper insulation box. A transverse partition is fixedly connected to the middle of the inner wall of the lower insulation box. A fan is fixedly connected to the top left side of the transverse partition. A longitudinal partition is fixedly connected to the bottom right side of the ventilation plate. The bottom end of the longitudinal partition is fixedly connected to the transverse partition. A second fan is fixedly connected to the top right side of the ventilation plate.

[0008] As a further description of the above technical solution:

[0009] A transparent plate is provided on the top left side of the conveyor, and screws are threaded to the four corners of the top of the transparent plate. The bottom ends of the screws are threaded to the conveyor.

[0010] As a further description of the above technical solution:

[0011] An installation box is fixedly connected to the top of the upper insulation box, and an alarm light is fixedly connected to the inner wall of the installation box.

[0012] As a further description of the above technical solution:

[0013] A temperature regulator is fixedly connected to the front side of the outer wall of the upper insulation box, and the temperature regulator is electrically connected to the heating wire.

[0014] As a further description of the above technical solution:

[0015] Each of the four corners of the bottom of the outer wall of the lower insulation box is fixedly connected to a foot, and each of the feet has a positioning hole in the middle.

[0016] As a further description of the above technical solution:

[0017] The front ends of the two bidirectional threaded rods are fixedly connected to a rotating disk, and the top of the front side of the outer wall of the two rotating disks are rotatably connected to a rotating handle.

[0018] As a further description of the above technical solution:

[0019] A controller is fixedly connected to the right front end of the outer wall of the conveyor, and the controller is electrically connected to the telescopic rod.

[0020] This utility model has the following beneficial effects:

[0021] 1. In this utility model, rotating the bidirectional threaded rod drives the limiting block and roller to adjust their positions, limiting the coating substrate from both sides to prevent the substrate from shifting due to the rotation of the rotating roller during unwinding. Then, the conveyor starts to stably transport the substrate, and the coating head slides in the second chute to adjust the width direction. The telescopic rod precisely controls the vertical distance between the coating head and the substrate to ensure uniform coating of the slurry and significantly improve the accuracy of the coating position.

[0022] 2. In this utility model, the waste heat air of the equipment is extracted by the fan in the lower insulation box and introduced into the upper insulation box through a carefully designed partition channel. After being heated by the heating wire, it is blown out by the second fan to the heat-requiring areas such as the coating substrate. This process realizes heat recovery and reuse, reduces dependence on additional energy, effectively reduces energy consumption, and thus reduces production costs. At the same time, the precise heat supply can better maintain the temperature stability of the coating process, which helps to improve the coating quality of lithium battery electrodes, ensure product performance, and achieve the dual effects of energy saving and quality improvement. Attached Figure Description

[0023] Figure 1 This is a perspective view of a lithium battery electrode coating device proposed in this utility model;

[0024] Figure 2 This is a partial structural schematic diagram of a lithium battery electrode coating device proposed in this utility model;

[0025] Figure 3 This is a schematic diagram of the coating head of a lithium battery electrode coating device proposed in this utility model;

[0026] Figure 4 This is a partial structural exploded view of a lithium battery electrode coating device proposed in this utility model;

[0027] Figure 5 This is a schematic diagram of the heat recovery mechanism of a lithium battery electrode coating device proposed in this utility model;

[0028] Figure 6 This is a cross-sectional view of the conveyor of a lithium battery electrode coating device proposed in this utility model.

[0029] Legend:

[0030] 1. Conveyor; 2. Heat recovery mechanism; 201. Upper insulation box; 202. Lower insulation box; 203. Ventilation plate; 204. Heating wire; 205. Transverse partition; 206. Fan 1; 207. Longitudinal partition; 208. Fan 2; 3. Conveyor roller; 4. Guide plate; 5. Slide 1; 6. Limit block; 7. Bidirectional threaded rod; 8. Roller; 9. Slide 2; 10. Coating head; 11. Mounting plate; 12. Telescopic rod; 13. Coating substrate; 14. Transparent plate; 15. Screw; 16. Mounting box; 17. Alarm light; 18. Temperature regulator; 19. Foot; 20. Positioning hole; 21. Rotary disc; 22. Rotating handle; 23. Controller. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] Reference Figure 1 , Figure 3 and Figure 4This utility model provides an embodiment of a lithium battery electrode coating device, including a conveyor 1, which serves as the basic carrier for the operation of the entire device. Multiple conveying rollers 3 are rotatably connected to the inner wall of the conveyor 1. The conveying rollers 3 are used to drive the coating substrate 13 to slide on its outer wall. Guide plates 4 are fixedly connected to the left and right sides of the inner wall of the conveyor 1. A sliding groove 5 is formed on the left side of the outer wall of each guide plate 4. The sliding groove 5 provides a sliding track for a limiting block 6. Limiting blocks 6 are slidably connected to the inner walls of the multiple sliding grooves 5. The limiting blocks 6 slide within the sliding grooves 5 to adjust their positions. The inner walls of the conveyor 1 are... Each side of the conveyor 1 is rotatably connected to a bidirectional threaded rod 7. Rotation of the bidirectional threaded rod 7 drives the movement of the limiting block 6. Each of the two bidirectional threaded rods 7 is threadedly connected to its corresponding limiting block 6. Through this threaded connection, the rotation of the bidirectional threaded rod 7 drives the limiting block 6 to slide axially. Rollers 8 are rotatably connected to adjacent sides of the multiple limiting blocks 6 to limit the coating substrate 13 and prevent it from shifting during transport. Slide grooves 9 are provided in the middle of the front and rear sides of the inner wall of the conveyor 1 to provide sliding space for the coating head 10. The coating head 10 is slidably connected between adjacent slide grooves 9. The conveyor 1 has an inner sliding mechanism for adjusting its position along the width of the substrate. A mounting plate 11 is fixedly connected to the left side of the inner wall of the conveyor 1 for mounting a telescopic rod 12. The telescopic rod 12 is also fixedly connected to the right side of the outer wall of the mounting plate 11, allowing control of the coating head 10's position perpendicular to the substrate plane. By precisely adjusting the distance between the coating head 10 and the coating substrate 13, the slurry can be evenly coated onto the coating substrate 13. The outer wall of the conveyor roller 3 is slidably connected to the coating substrate 13, which serves as the carrier for the coating operation. A heat recovery mechanism 2 is located on the top right side of the conveyor 1. Structure 2 is designed to reduce energy consumption. A transparent plate 14 is provided on the top left side of the conveyor 1. The transparent plate 14 allows the operator to observe the internal condition of the device. Screws 15 are threaded to the four corners of the top of the transparent plate 14. The bottom ends of the screws 15 are threaded to the conveyor 1. The front ends of the two bidirectional threaded rods 7 are fixedly connected to the rotating disks 21. The rotation of the bidirectional threaded rods 7 provides the operating force point. The top of the front side of the outer wall of the two rotating disks 21 is rotatably connected to the rotating handles 22, which makes it easy for the operator to manually rotate the bidirectional threaded rods 7, thereby more conveniently adjusting the position of the limit block 6 and the roller 8.

[0033] Specifically, the conveyor 1, acting as the basic carrier for the overall operation, starts and drives multiple conveying rollers 3 to rotate, thereby causing the coating substrate 13 to slide on its outer wall, ensuring stable transport of the substrate along the set direction of the conveyor 1. During this process, the guide plates 4 on the left and right sides of the inner wall of the conveyor 1 provide initial guidance for the substrate. Simultaneously, the limiting position of the substrate can be adjusted by rotating the bidirectional threaded rod 7, which is threadedly connected to the limiting block 6. When rotated, the limiting block 6 slides axially within the first chute 5 along the bidirectional threaded rod 7, thereby adjusting the position of the rollers 8 on the limiting block 6. The rollers 8 limit the coating substrate 13 from both sides, preventing it from shifting during transport. When the coating substrate 13 reaches the designated position, the coating head 10 begins operation. The coating head 10 can slide within the second chute 9. The position is adjusted along the width of the substrate. The telescopic rod 12 on the mounting plate 11 controls the position of the coating head 10 in the direction perpendicular to the substrate plane. By adjusting the distance between the coating head 10 and the coating substrate 13, the slurry can be evenly coated on the coating substrate 13 to complete the coating of the lithium battery electrode. The transparent plate 14 on the top left of the conveyor 1 is threaded to the conveyor 1 by the screws 15 at the four corners for easy observation and protection. The rotating disk 21 at the front end of the bidirectional threaded rod 7 provides an operating point for its rotation. The rotating handle 22 connected to the rotating disk 21 makes it easy to manually rotate the bidirectional threaded rod 7. The rotating handle 22 drives the rotating disk 21 to rotate the bidirectional threaded rod 7, thereby adjusting the position of the limit block 6 and the roller 8 to adapt to coating substrates 13 of different widths.

[0034] Reference Figure 1 , Figure 5 and Figure 6The heat recovery mechanism 2 includes an upper insulation box 201, which provides space for subsequent heating and conveying of air. The upper insulation box 201 is fixedly connected to the top right side of the outer wall of the conveyor 1. A lower insulation box 202 is fixedly connected to the bottom right side of the outer wall of the conveyor 1, which is responsible for collecting and initially treating the waste heat air. A ventilation plate 203 is fixedly connected to the inner wall of the upper insulation box 201. The ventilation plate 203 guides the air flow direction in the upper insulation box 201, so that the air can be heated more orderly. A heating wire 2 is fixedly connected to the bottom of the inner wall of the upper insulation box 201. 04. The passing air is heated to raise its temperature to meet usage requirements. A transverse partition 205 is fixedly connected to the middle of the inner wall of the lower insulation box 202. The transverse partition 205 divides the internal space of the lower insulation box 202 into upper and lower areas, guiding the orderly flow of air. A fan 206 is fixedly connected to the top left side of the transverse partition 205 to draw the air containing residual heat from the equipment into the lower insulation box 202. A longitudinal partition 207 is fixedly connected to the bottom right side of the ventilation plate 203. The longitudinal partition 207 works in conjunction with the transverse partition 205 to further optimize the airflow. The airflow path ensures smooth airflow into the upper insulation box 201. The bottom end of the longitudinal partition 207 is fixedly connected to the transverse partition 205. A second fan 208 is fixedly connected to the top right side of the ventilation plate 203. The second fan 208 blows the heated air out from the top right side of the ventilation plate 203, guiding the coated substrate 13 and other heat-requiring areas on the guide conveyor 1 to achieve heat recovery and utilization. A mounting box 16 is fixedly connected to the top of the upper insulation box 201, providing an installation position for the alarm light 17. The alarm light 17 is fixedly connected to the inner wall of the mounting box 16. When the internal temperature of the heat recovery mechanism 2 becomes abnormal, which may affect the coating quality or even the safety of the equipment, the alarm light 17 will light up to alert the operator to pay attention and deal with it in time. A temperature regulator 18 is fixedly connected to the front side of the outer wall of the upper insulation box 201. The temperature regulator 18 is electrically connected to the heating wire 204. The operator sets the target temperature value through the temperature regulator 18. The temperature regulator 18 adjusts the current of the heating wire 204 in real time according to the monitored temperature. The upper insulation box is connected to the temperature regulator 18, and the temperature regulator 18 is electrically connected to the heating wire 204.

[0035] Specifically, after startup, the fan 206 inside the lower insulation box 202 operates first, drawing in the air containing residual heat from the equipment. This air enters the lower insulation box 202 under the action of the fan 206. The transverse partition 205 divides the lower insulation box 202 into upper and lower sections, guiding the orderly flow of air. Subsequently, the air enters the upper insulation box 201 through the channel formed by the longitudinal partition 207 and the transverse partition 205. In the upper insulation box 201, the ventilation plate 203 further guides the air direction. At this time, the heating wire 204 is energized and heats up, heating the passing air. The heated air, under the action of the second fan 208, flows out from the ventilation plate... Hot air blown out from the top right side of 203 can be guided to areas requiring heat, such as the coating substrate 13 on the conveyor 1, for drying or maintaining a suitable temperature, realizing heat recovery and utilization, and reducing energy consumption. The alarm light 17 inside the box 16 at the top of the upper insulation box 201 is used to warn of abnormal temperature. The temperature regulator 18 on the front is electrically connected to the heating wire 204. The operator sets the temperature through it. The temperature regulator 18 adjusts the current of the heating wire 204 in real time according to the monitored temperature to maintain a suitable temperature in the upper insulation box 201, ensuring stable operation of the mechanism and coating quality. The alarm light 17 reminds the operator to pay attention when the temperature is abnormal.

[0036] Reference Figure 1 , Figure 2 and Figure 3 At the four corners of the bottom of the outer wall of the lower insulation box 202, there are fixed feet 19. The feet 19 support the lower insulation box 202 and keep it in a stable position. Positioning holes 20 are opened in the middle of the feet 19 to further ensure the stability of the lower insulation box 202 and reduce the shaking during operation. A controller 23 is fixedly connected to the right side of the front end of the outer wall of the conveyor 1. The controller 23 is electrically connected to the telescopic rod 12. The operator sends commands to the telescopic rod 12 through the controller 23 to precisely control the extension length of the telescopic rod 12, thereby flexibly adjusting the distance between the coating head 10 and the coating substrate 13.

[0037] Specifically, the four corner feet 19 at the bottom of the lower insulation box 202 are provided with positioning holes 20 for fixing to the ground, etc., to ensure the stability of the device. The controller 23 on the right side of the front end of the conveyor 1 is electrically connected to the telescopic rod 12. The operator can use this to precisely control the extension and retraction of the telescopic rod 12, thereby controlling the distance between the coating head 10 and the substrate, ensuring the coating quality and precision of the lithium battery electrode sheet.

[0038] Working principle: First, the operator rotates the bidirectional threaded rod 7. Since the bidirectional threaded rod 7 and the limiting block 6 are threadedly connected, when the bidirectional threaded rod 7 is rotated, the limiting block 6 will slide along the axial direction of the bidirectional threaded rod 7 in the first slide groove 5, thereby driving the roller 8 to adjust its position and limit the coating substrate 13 from both sides to prevent it from deviating during the conveying process. The conveyor 1 starts and acts as the basic carrier of the entire operation, driving multiple conveying rollers 3 to rotate, thereby causing the coating substrate 13 to slide on the outer wall of the conveying roller 3 and be stably conveyed in the preset direction. When the coating substrate 13 reaches the designated position, the coating head 10 slides in the second slide groove 9 to realize the position adjustment along the width direction of the substrate to adapt to the coating requirements of different widths. At the same time, the telescopic rod 12 on the mounting plate 11 can control the position of the coating head 10 in the direction perpendicular to the substrate plane. By precisely adjusting the distance between the coating head 10 and the coating substrate 13, it is ensured that the slurry can be evenly coated on the coating substrate 13, and finally the coating work of the lithium battery electrode is completed, ensuring the coating quality and electrode performance.

[0039] Furthermore, when the heat recovery system is working, the fan 206 inside the lower insulation box 202 starts first, drawing the residual heat air from the equipment into the lower insulation box 202. The transverse partition 205 divides it into upper and lower zones to guide the airflow. The air enters the upper insulation box 201 through the channel formed by the longitudinal partition 207 and the transverse partition 205. The ventilation plate 203 in the upper insulation box 201 guides the air direction. At the same time, the heating wire 204 is energized to heat the air. The heated air is blown out from the top right side of the ventilation plate 203 under the action of the fan 208 and is guided to the heat-requiring areas such as the coating substrate 13 on the conveyor 1 for drying or maintaining the temperature, thereby realizing heat recovery and utilization and reducing energy consumption.

[0040] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A lithium battery electrode coating apparatus, comprising a conveyor (1), characterized in that: The inner wall of the conveyor (1) is rotatably connected to multiple conveying rollers (3). Guide plates (4) are fixedly connected to the left and right sides of the inner wall of the conveyor (1). A sliding groove (5) is opened on the left side of the outer wall of each of the two guide plates (4). Limiting blocks (6) are slidably connected to the inner walls of the multiple sliding grooves (5). Bidirectional threaded rods (7) are rotatably connected to the left and right sides of the inner wall of the conveyor (1). The two bidirectional threaded rods (7) are respectively threaded to the corresponding limiting blocks (6). Rollers (8) are rotatably connected to the adjacent side of the multiple limiting blocks (6). The inner wall of the conveyor (1) is provided with two grooves (9) in the middle of the front and rear sides. A coating head (10) is slidably connected between the two adjacent grooves (9). An installation plate (11) is fixedly connected to the left side of the inner wall of the conveyor (1). A telescopic rod (12) is fixedly connected to the right side of the outer wall of the installation plate (11). The right end of the telescopic rod (12) is fixedly connected to the installation plate (11). A coating substrate (13) is slidably connected to the outer wall of the conveyor roller (3). A heat recovery mechanism (2) is provided on the top right side of the conveyor (1). The heat recovery mechanism (2) is used to reduce energy consumption.

2. The lithium battery electrode coating apparatus according to claim 1, characterized in that: The heat recovery mechanism (2) includes an upper insulation box (201), which is fixedly connected to the top right side of the outer wall of the conveyor (1). A lower insulation box (202) is fixedly connected to the bottom right side of the outer wall of the conveyor (1). A ventilation plate (203) is fixedly connected to the inner wall of the upper insulation box (201). A heating wire (204) is fixedly connected to the bottom of the inner wall of the upper insulation box (201). A transverse partition (205) is fixedly connected to the middle of the inner wall of the lower insulation box (202). A fan (206) is fixedly connected to the top left side of the transverse partition (205). A longitudinal partition (207) is fixedly connected to the bottom right side of the ventilation plate (203). The bottom end of the longitudinal partition (207) is fixedly connected to the transverse partition (205). A fan (208) is fixedly connected to the top right side of the ventilation plate (203).

3. The lithium battery electrode coating apparatus according to claim 1, characterized in that: A transparent plate (14) is provided on the top left side of the conveyor (1). Screws (15) are threaded to the four corners of the top of the transparent plate (14). The bottom ends of the screws (15) are threaded to the conveyor (1).

4. The lithium battery electrode coating apparatus according to claim 2, characterized in that: An installation box (16) is fixedly connected to the top of the upper insulation box (201), and an alarm light (17) is fixedly connected to the inner wall of the installation box (16).

5. The lithium battery electrode coating apparatus according to claim 2, characterized in that: A temperature regulator (18) is fixedly connected to the front side of the outer wall of the upper insulation box (201), and the temperature regulator (18) is electrically connected to the heating wire (204).

6. The lithium battery electrode coating apparatus according to claim 2, characterized in that: The lower insulation box (202) has four corners at the bottom of the outer wall fixedly connected to feet (19), and each of the feet (19) has a positioning hole (20) in the middle.

7. The lithium battery electrode coating apparatus according to claim 1, characterized in that: The front ends of the two bidirectional threaded rods (7) are fixedly connected to a rotating disk (21), and the top of the front side of the outer wall of the two rotating disks (21) are rotatably connected to a rotating handle (22).

8. The lithium battery electrode coating apparatus according to claim 1, characterized in that: A controller (23) is fixedly connected to the right side of the front end of the outer wall of the conveyor (1), and the controller (23) is electrically connected to the telescopic rod (12).

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