Pole piece cooling device and coating machine

Abstract

The utility model relates to the technical field of coating machines, and discloses a pole piece cooling device and a coating machine, and the pole piece cooling device comprises a mounting main body, an air uniformizing box body, an air cooling assembly and a plurality of air outlet tuyeres, the air uniformizing box body is arranged at the top of the mounting main body and communicates with the air cooling assembly; the air outlet tuyeres are arranged at the bottom of the air uniformizing box body and communicate with the air uniformizing box body, and air outlet strip seams are formed in the air outlet tuyeres and used for jetting airflow. According to the utility model, different areas of the pole piece can be covered by simultaneously arranging a plurality of air outlet tuyeres, so that the whole pole piece can be effectively cooled, the cooling quality and consistency of the pole piece are ensured, the cooling effect of the pole piece is improved, and the production efficiency is improved. Therefore, the conditions that the guide roller bearing is blocked or the service life is shortened due to thermal deformation and the surface density detection precision is influenced by over-high temperature of the pole piece are prevented.

Description

Technical Field

[0001] This utility model relates to the field of coating machine technology, specifically to an electrode cooling device and a coating machine. Background Technology

[0002] In the lithium battery production process, the electrodes from the coating machine need to be cooled after drying and exiting the furnace. Currently, common cooling methods include natural cooling and cooling water cooling of the traction rollers. However, the cooling methods in these technologies are limited by environmental conditions and the roll wrap angle, resulting in poor cooling effects. This can lead to problems such as guide roller bearings seizing due to thermal deformation or reduced lifespan, and excessively high electrode temperatures affecting the accuracy of areal density detection, ultimately impacting the consistency of battery capacity and yield. Utility Model Content

[0003] In view of this, the present invention provides an electrode cooling device and a coating machine to solve the problem of poor electrode cooling effect.

[0004] In a first aspect, this utility model provides an electrode cooling device, comprising:

[0005] The main body, air distribution box, air-cooling components, and multiple air outlet nozzles are installed.

[0006] The air distribution box is located on the top of the mounting body and is connected to the air-cooling assembly;

[0007] Multiple air outlet nozzles are respectively disposed at the bottom of the air distribution box and communicate with the air distribution box. Each of the multiple air outlet nozzles is provided with an air outlet slit, which is used to spray airflow.

[0008] Beneficial Effects: By placing the air distribution box at the top of the mounting body and connecting it to the air-cooling component, the air-cooling component can deliver airflow into the air distribution box. Within the air distribution box, the airflow is pre-treated, ensuring uniform distribution. Multiple air outlets are located at the bottom of the air distribution box and are connected to it to guide the airflow out. Each air outlet has an air slit, through which airflow is discharged from the air distribution box and directed towards the electrode after passing through the electrode cooling device, carrying away heat and cooling the electrode. The simultaneous use of multiple air outlets and air slits covers different areas of the electrode, ensuring effective cooling of the entire electrode, guaranteeing the quality and consistency of cooling, and improving the cooling effect. This prevents issues such as guide roller bearing seizure or reduced lifespan due to thermal deformation, and avoids situations where excessively high electrode temperatures affect the accuracy of areal density detection.

[0009] In one optional embodiment, the air outlet nozzle is provided with a uniform air distribution plate to ensure that the airflow is evenly sprayed out from the air outlet slit.

[0010] Beneficial effects: By installing a uniform airflow mesh plate inside the air outlet nozzle, the airflow first encounters the mesh plate after entering the nozzle from the airflow distribution box. This mesh plate has multiple perforations. As the airflow passes through these perforations, the high-speed airflow decreases while the low-speed airflow increases due to the obstruction effect of the perforations. Simultaneously, the airflow direction is guided to be more regular, ensuring that the airflow ejected from the air outlet slits maintains relative consistency in speed and pressure. When the airflow is sprayed onto the electrode, a uniform cooling effect is achieved across the entire electrode surface, improving cooling quality and efficiency.

[0011] In one alternative embodiment, the size of the air outlet nozzle gradually decreases from the air distribution mesh towards the air outlet slot.

[0012] Beneficial effects: As the size of the air outlet nozzle gradually decreases from the air distribution plate towards the air outlet slot, the cross-sectional area of ​​the air outlet nozzle also decreases, which in turn gradually increases the airflow velocity, which is beneficial for the airflow to be sprayed onto the electrode surface and enhances the cooling effect of the electrode; it also makes it easier to evenly spray the airflow from the air outlet slot.

[0013] In one optional embodiment, the central axis of the air outlet nozzle is set at a target angle to the direction of movement of the electrode.

[0014] Beneficial effects: By setting the central axis of the air outlet nozzle at a target angle with the direction of movement of the electrode, the airflow can have a relatively long path on the surface of the electrode, allowing the airflow to flow better along the surface of the electrode and evenly cover the surface of the electrode, thereby preventing excessive local temperature differences and further improving the cooling efficiency of the electrode.

[0015] In one optional implementation, the target angle satisfies 30 degrees to 90 degrees.

[0016] Beneficial effects: By setting a suitable target angle, the electrode can be cooled sufficiently by adjusting the angle between the air nozzle and the direction of movement of the electrode during cooling, thus effectively improving the cooling effect of the electrode.

[0017] In one optional embodiment, the air-cooling assembly includes an air supply duct that is connected to the air distribution box, and at least one first guide plate is provided inside the air supply duct along its length.

[0018] Beneficial effects: By installing a first guide plate inside the air supply duct and positioning it along the length of the duct, when the air-cooling assembly delivers airflow to the air distribution box through the duct, the first guide plate can ensure that the airflow flows in an orderly manner in a certain direction, thereby guaranteeing that the airflow can enter the air distribution box more smoothly. Furthermore, the airflow entering the air distribution box from the air supply duct is more uniform in terms of flow rate and velocity, providing a guarantee for subsequent cooling of the electrode sheets.

[0019] In one optional embodiment, the air distribution box is provided with at least one second guide plate, the second guide plate is perpendicular to the first guide plate, and the connection between the second guide plate and the first guide plate is arc-shaped.

[0020] Beneficial effects: By installing a second guide plate perpendicular to the first guide plate within the air distribution box, the airflow can continue moving along the second guide plate upon entering the box. This further adjusts the airflow direction within the box, ensuring reasonable guidance in multiple directions and guaranteeing a more uniform airflow from the outlet nozzles at the bottom of the box, thus more effectively cooling the electrode. Setting the connection between the second and first guide plates as an arc shape allows the airflow to smoothly transition from the direction guided by the first guide plate to that guided by the second, reducing resistance and turbulence during direction changes and preventing uneven airflow distribution caused by drastic changes in direction.

[0021] In one optional embodiment, the air-cooling assembly further includes a fan, which is disposed on the air supply duct and is used to transport airflow through the air supply duct to the air distribution box.

[0022] A filter is provided at the fan and connected to the air supply duct for filtering the airflow.

[0023] Beneficial effects: By installing the fan on the air supply duct, sufficient power is generated to draw in external airflow and deliver it to the air distribution box through the duct. Furthermore, by controlling the fan speed, the airflow rate and velocity delivered to the air distribution box can be adjusted. A filter is installed at the fan location and connected to the air supply duct. As the fan provides power to draw in surrounding air, the filter purifies the air during the intake process, ensuring that clean airflow is drawn into the air supply duct and then delivered to the air distribution box, providing a stable and clean cooling airflow for the electrode cooling device.

[0024] In one alternative embodiment, at least one first guide roller is rotatably disposed on the mounting body, and the first guide roller has a plurality of grooves along its length.

[0025] Beneficial effects: The first guide roller is rotatably mounted on the mounting body, allowing it to contact the electrode with low frictional resistance. As the electrode moves across the surface of the first guide roller, the roller rotates along with it due to friction, facilitating smoother movement of the electrode within the cooling device. During production, the electrode moves at a relatively high speed; air may not be completely expelled during the electrode's contact with the first guide roller, forming air bubbles that can deviate from the electrode's path. By creating multiple grooves along the length of the first guide roller, air can be expelled from between the electrode and the roller, ensuring the electrode moves along a predetermined path and maintaining its edges in the correct positions. This ensures the electrode's width, length, and other dimensional parameters meet requirements, facilitating subsequent processing and battery assembly.

[0026] Secondly, this utility model also provides a coating machine, comprising:

[0027] Oven;

[0028] The electrode cooling device as described in any of the preceding claims is located at the electrode exit point of the oven.

[0029] Beneficial effects: Since the coating machine includes an electrode cooling device, it has the same effect as the electrode cooling device, which will not be elaborated here. Attached Figure Description

[0030] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0031] Figure 1 This is a perspective view of an electrode cooling device according to an embodiment of the present invention;

[0032] Figure 2 for Figure 1 The front view of the electrode cooling device shown;

[0033] Figure 3 for Figure 1 Left view of the electrode cooling device shown;

[0034] Figure 4 for Figure 1 Right view of the electrode cooling device shown;

[0035] Figure 5This is a schematic diagram of the air outlet nozzle in an electrode cooling device according to an embodiment of the present invention.

[0036] Explanation of reference numerals in the attached figures:

[0037] 10. Main installation unit; 100. Air distribution box; 110. Air outlet nozzle; 111. Air outlet slot; 112. Air distribution mesh plate; 200. Air supply duct; 300. Fan; 400. Filter; 500. First guide roller; 510. Groove; 600. Second guide roller; 700. Third guide roller; 20. Oven. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0039] According to embodiments of the present invention, such as Figures 1 to 5 As shown, on one hand, an electrode cooling device is provided, including: a mounting body 10, an air distribution box 100, an air cooling assembly, and a plurality of air outlet nozzles 110; the air distribution box 100 is disposed on the top of the mounting body 10 and is connected to the air cooling assembly; the plurality of air outlet nozzles 110 are respectively disposed on the bottom of the air distribution box 100 and are connected to the air distribution box 100, and each of the plurality of air outlet nozzles 110 is provided with an air outlet slit 111 for spraying airflow.

[0040] In this example, an installation body 10 is provided, and an air distribution box 100 is set on the top of the installation body 10. An air-cooling component is set on the side of the installation body 10 and connected to the air distribution box 100. The air-cooling component can deliver airflow into the air distribution box 100. The airflow delivered by the air-cooling component can be preliminarily processed in the air distribution box 100 so that the airflow is evenly distributed in the air distribution box 100.

[0041] Multiple air outlets 110 are provided at the bottom of the air distribution box 100 and are connected to the air distribution box 100. The multiple air outlets 110 are spaced apart on the air distribution box 100 to guide the airflow inside the air distribution box 100. The more air outlets 110 there are, the better the cooling effect of the electrode. Considering the manufacturing cost and the structure and size of the air distribution box 100, the number of air outlets 110 can be set according to actual usage requirements and is not specifically limited. Each air outlet 110 is provided with an air outlet slit 111, through which airflow can be discharged from the air distribution box 100 and blown onto the electrode after passing through the electrode cooling device, carrying away the heat of the electrode to cool it. The air outlet slit 111 can control the direction and speed of the airflow, and the shape of the air outlet slit 111 can be set according to usage requirements. By simultaneously setting multiple air outlet nozzles 110 and air outlet slots 111, different areas of the electrode sheet can be covered, ensuring that the entire electrode sheet can be effectively cooled, guaranteeing the quality and consistency of electrode sheet cooling, improving the cooling effect of the electrode sheet, and thus preventing situations such as guide roller bearings jamming or having reduced lifespan due to thermal deformation, and electrode sheet temperature being too high and affecting the accuracy of areal density detection.

[0042] Furthermore, both sides of the air distribution box 100 are provided with connectors. The connectors include a first connecting part and a second connecting part. The connectors are connected to the outer side wall of the air distribution box 100 through the first connecting part, and the second connecting part is engaged with bolts to set the connectors on the mounting body 10, thereby detachably installing the air distribution box 100 on the mounting body 10.

[0043] like Figure 5 As shown, in one embodiment, the air outlet nozzle 110 is provided with a uniform air distribution plate 112, which is used to make the airflow spray out evenly from the air outlet slot 111.

[0044] In this example, an air distribution mesh plate 112 is installed inside the air outlet nozzle 110. When the airflow enters the air outlet nozzle 110 from the air distribution box 100, it first encounters the air distribution mesh plate 112, which has multiple pores. When the airflow passes through the pores of the air distribution mesh plate 112, the speed of high-speed airflow decreases and the speed of low-speed airflow increases due to the obstruction effect of the pores. At the same time, the airflow direction is also guided to be more regular, thereby ensuring that the airflow ejected from the air outlet slot 111 maintains a relatively consistent speed and pressure. When the airflow is sprayed onto the electrode, a uniform cooling effect can be achieved on the entire electrode surface, improving cooling quality and efficiency. The size, shape, number, and distribution of the pores can be set according to actual usage requirements and are not specifically limited. For example, the shape of the pores on the air distribution mesh plate 112 can be circular, triangular, or irregular; the distribution of the pores can be uniform or irregular.

[0045] In one embodiment, the size of the air outlet nozzle 110 gradually decreases from the air distribution mesh plate 112 toward the air outlet slot 111. By setting the size (e.g., diameter) of the air outlet nozzle 110 to gradually decrease from the air distribution mesh plate 112 toward the air outlet slot 111, the cross-sectional area of ​​the air outlet nozzle 110 also decreases, thereby gradually increasing the airflow velocity. This is beneficial for the airflow to be sprayed onto the electrode surface, enhancing the cooling effect of the electrode; and it also facilitates the uniform spraying of airflow from the air outlet slot 111.

[0046] In one embodiment, the central axis of the air outlet nozzle 110 is set at a target angle to the direction of movement of the electrode plate.

[0047] In this example, by setting the central axis of the air outlet nozzle 110 at a target angle to the direction of electrode movement, i.e., the direction of the airflow ejected from the air outlet slot 111 at a target angle to the direction of electrode movement, the airflow can have a relatively long path on the electrode surface. This allows the airflow to flow better along the electrode surface and evenly cover the surface, thus preventing excessive local temperature differences and further improving the cooling efficiency of the electrode. The orientation of the air outlet nozzle 110 can be opposite to the direction of electrode movement, making the direction of the airflow ejected from the air outlet slot 111 opposite to the direction of electrode movement; or the orientation of the air outlet nozzle 110 can be the same as the direction of electrode movement, making the direction of the airflow ejected from the air outlet slot 111 the same as the direction of electrode movement; or some air outlet nozzles 110 can be oriented opposite to the direction of electrode movement, while others are oriented the same as the direction of electrode movement. The specific orientation of the air outlet nozzle 110 can be determined according to the actual usage.

[0048] Furthermore, the target angle is between 30 and 90 degrees. Specifically, the target angle can be 30, 45, 60, 75, or 90 degrees, and can be set according to actual usage requirements. For example, when the direction of the airflow from the outlet slot 111 is opposite to the direction of the electrode's movement and the target angle is 30 degrees, the time for the airflow to cool the electrode surface can be effectively increased, thus better cooling the electrode and effectively improving its cooling effect.

[0049] In one embodiment, the air-cooled assembly includes an air supply duct 200, which is connected to the air distribution box 100, and at least one first guide plate is provided inside the air supply duct 200 along its length.

[0050] In this example, the air-cooling assembly includes an air supply duct 200. At least one first guide plate is disposed within the air supply duct 200, and the first guide plate is positioned along the length of the air supply duct 200. When the air-cooling assembly delivers airflow through the air supply duct 200 to the air distribution box 100, the first guide plate allows the airflow to flow in an orderly manner in a certain direction, thereby ensuring that the airflow can enter the air distribution box 100 more smoothly. Furthermore, the airflow entering the air distribution box 100 from the air supply duct 200 is more uniform in terms of flow rate and velocity, providing a guarantee for subsequent cooling of the electrode sheets. The number of first guide plates can be set according to actual usage requirements, and can be one, two, three, etc., without specific limitation.

[0051] In one embodiment, the air distribution box 100 is provided with at least one second guide plate, the second guide plate is perpendicular to the first guide plate, and the connection between the second guide plate and the first guide plate is arc-shaped.

[0052] In this example, at least one second guide plate is provided inside the air distribution box 100, and the second guide plate is perpendicular to the first guide plate. When the airflow enters the air distribution box 100, it continues to move along the second guide plate, further adjusting the direction of airflow within the air distribution box 100. This ensures that the airflow is reasonably guided in multiple directions, guaranteeing a more uniform airflow from the air outlet nozzle 110 at the bottom of the air distribution box 100, thereby more effectively cooling the electrode. The number of second guide plates matches the number of first guide plates. The air outlet nozzle 110 can be positioned between the second guide plate and the air distribution box 100, or between two adjacent second guide plates. This allows the airflow to enter the air outlet nozzle 110 through the channel formed by the second guide plate and be uniformly ejected through the air outlet slot 111 of the air outlet nozzle 110.

[0053] Furthermore, by setting the connection between the second guide vane and the first guide vane to be arc-shaped, the airflow can smoothly transition from the direction guided by the first guide vane to the direction guided by the second guide vane, reducing the resistance and turbulence of the airflow when changing direction, and avoiding uneven airflow distribution caused by drastic changes in direction.

[0054] In one embodiment, the air-cooled assembly further includes a fan 300, which is disposed on the air supply duct 200 and is used to deliver airflow through the air supply duct 200 to the air distribution box 100; and a filter 400, which is disposed at the fan 300 and connected to the air supply duct 200 and is used to filter the airflow.

[0055] In this example, the air-cooling assembly also includes a fan 300 and a filter 400. The fan 300 is mounted on the air supply duct 200 to generate sufficient power to draw in external airflow and deliver it to the air distribution box 100 through the air supply duct 200. Furthermore, by controlling the rotational speed of the fan 300, the airflow rate and velocity delivered to the air distribution box 100 can be adjusted. For example, if enhanced cooling is required, the rotational speed of the fan 300 can be increased, thereby increasing the airflow rate and velocity entering the air distribution box 100, allowing the airflow ejected from the air outlet 110 to more quickly remove heat from the electrode. The filter 400 is further mounted at the fan 300 and connected to the air supply duct 200. While the fan 300 provides power to draw in surrounding air, the filter 400 purifies the air during the intake process, ensuring that clean airflow is drawn into the air supply duct 200 and then delivered to the air distribution box 100, providing a stable and clean cooling airflow for the electrode cooling device.

[0056] like Figure 4 As shown, in one embodiment, it further includes at least one first guide roller 500, rotatably mounted on the mounting body 10, with a plurality of grooves 510 provided on the first guide roller 500 along its length. Further, it also includes a second guide roller 600 and a third guide roller 700, both rotatably mounted on the mounting body 10. The second guide roller 600 is mounted on the side away from the first guide roller 500, and the third guide roller 700 is mounted between the first guide roller 500 and the second guide roller 600.

[0057] In this example, the first guide roller 500, the second guide roller 600, and the third guide roller 700 are rotatably mounted on the mounting body 10, allowing them to contact the electrode sheet with low frictional resistance. As the electrode sheet moves across the surface of the guide rollers, the guide rollers rotate along with the electrode sheet due to friction, thus enabling the electrode sheet to move more smoothly within the cooling device.

[0058] Because the electrode moves at a relatively high speed during production, air may not be completely expelled during the electrode's bonding with the first guide roller 500, and may be trapped between the electrode and the first guide roller 500, forming air bubbles. This can cause deviations in the electrode's movement path. By providing multiple grooves 510 along the length of the first guide roller 500, air between the electrode and the first guide roller 500 can be expelled from the grooves 510, ensuring that the electrode moves along a preset path and that the two edges of the electrode remain in the predetermined position. This ensures that the electrode's width, length, and other dimensional parameters meet the requirements, which is beneficial for subsequent processing and battery assembly.

[0059] Furthermore, two first guide rollers 500 are provided; the second guide roller 600 is used to support the electrode sheet and allow the electrode sheet to move on the second guide roller 600 under the action of traction force; next, the electrode sheet passes under the third guide roller 700, and the third guide roller 700 plays a certain role in fixing the electrode sheet to prevent deviation of the electrode sheet's movement path; then the electrode sheet contacts the lower part of one of the first guide rollers 500, and changes the movement path of the electrode sheet according to the traction force, so that the electrode sheet moves to the upper part of the other first guide roller 500; finally, after the two first guide rollers 500 correct the electrode sheet, the cooling of the electrode sheet is completed.

[0060] According to an embodiment of this utility model, another aspect provides a coating machine, including: an oven 20; and an electrode cooling device disposed at the electrode exit point of the oven 20. Since the coating machine includes an electrode cooling device and has the same effect as the electrode cooling device, it will not be described in detail here.

[0061] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. An electrode sheet cooling device characterized by comprising: It comprises: an installation body (10), a uniform air box (100), an air cooling assembly and a plurality of air outlet nozzles (110); the uniform air box (100) is arranged at the top of the installation body (10) and communicates with the air cooling assembly; a plurality of air outlet nozzles (110) are arranged at the bottom of the uniform air box (100) and communicate with the uniform air box (100), and each air outlet nozzle (110) is provided with an air outlet slot (111) for spraying air flow.

2. The pole piece cooling device of claim 1, wherein The air outlet nozzle (110) is provided with a uniform air net plate (112) for uniformly spraying air flow from the air outlet slot (111).

3. The pole piece cooling device of claim 2, wherein The size of the air outlet nozzle (110) gradually decreases from the uniform air net plate (112) to the air outlet slot (111).

4. The pole piece cooling device of claim 1, wherein The central axis of the air outlet nozzle (110) is arranged at a target angle with the movement direction of the pole piece.

5. The pole piece cooling device of claim 4, wherein The target angle is 30-90 degrees.

6. The pole piece cooling device of claim 1, wherein The air cooling assembly comprises an air supply pipeline (200) which communicates with the uniform air box, and at least one first flow guide plate is arranged in the air supply pipeline (200) along the length direction of the air supply pipeline (200).

7. The pole piece cooling device of claim 6, wherein At least one second flow guide plate is arranged in the uniform air box (100), which is perpendicular to the first flow guide plate, and the connection between the second flow guide plate and the first flow guide plate is arc-shaped.

8. The pole piece cooling device of claim 6, wherein The air cooling assembly further comprises a fan (300) arranged on the air supply pipeline (200) for conveying air flow through the air supply pipeline (200) into the uniform air box (100). A filter (400) is arranged at the fan (300) and communicates with the air supply pipeline (200) for filtering the air flow.

9. The pole piece cooling device according to any one of claims 1 to 7, characterized by, Further comprising at least one first guide roller (500) rotatably arranged on the installation body (10), and a plurality of grooves (510) are arranged on the first guide roller (500) along the length direction of the first guide roller (500).

10. A coater characterized by comprising: It comprises: an oven (20); the pole piece cooling device as claimed in any one of claims 1 to 9 is arranged at the pole piece discharge position of the oven.

Images