Air box baffle structure of lithium battery coating oven and coating oven

Abstract

The utility model discloses an air box baffle structure of a lithium battery coating oven and the coating oven. The air box baffle structure of the lithium battery coating oven comprises a baffle, the baffle is assembled on an air box sliding rail of a coating air box, a flow guide plate folded into a preset angle is assembled at the bottom of the baffle in a drawing mode, and the flow guide plate can be pulled out or withdrawn along a sliding groove in the baffle. According to the air box baffle structure of the lithium battery coating oven, the baffle is matched with the flow guide plate, so that the flow guide plate can extend out by utilizing the drawable property of the flow guide plate, and the blocking area is increased; and the guide plate can be folded into a preset angle after being pulled out, the angle of the guide plate can be adjusted, and the air flow is guided to a right side material area with low drying degree on the left side for heat flow compensation, so that the transverse overall drying uniformity of the pole piece is optimized, and the cracking defect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of sheet coating ovens, in particular to an air box baffle structure of a lithium battery coating oven. Background Art

[0002] In high-precision electrode coating ovens, drying efficiency is a key factor influencing the quality of the coated product. The lateral uniformity of moisture in the dried electrode is significantly affected by the air knife speed. A uniform air knife speed results in better lateral drying uniformity; an uneven air speed can lead to overdrying in some areas and substandard drying in others. Furthermore, due to the thinning of the two sides, exposed metal heat conduction, and the oven structure, coating can be affected. A completely uniform air speed can cause both ends to dry too quickly, resulting in appearance defects such as cracking, curling, and shrinkage of the electrode during the lithium battery coating process.

[0003] In existing electrode coating ovens, baffles are usually used to block the direct impact of hot air, but these structures still have problems such as low thermal efficiency and uneven drying. For example: First, the baffle structure is simple and there is no air guide device, which can only limit the airflow in a single area of the wind box. This has limitations and requires the stacking of multiple baffles; second, the baffle adjustment flexibility is poor. The baffle has only one adjustment state for the wind box air outlet, which is complete closure. It is impossible to adjust the angle of the baffle to guide the air flow according to the coating and drying status. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings and defects of the existing technology and to provide a lithium battery coating oven air box baffle structure. By optimizing the oven air box baffle structure, the diversion adjustment can be achieved, the lateral uniformity of the jet nozzle can be improved, the lateral oven jet uniformity can be maximized, and the appearance defects caused by uneven drying can be improved.

[0005] In the first aspect of the present invention, a lithium battery coating oven air box baffle structure is provided, comprising a baffle, which is mounted on the air box slide rail of the coating air box, and a guide plate folded into a preset angle is pull-out at the bottom of the baffle, and the guide plate can be pulled out or retracted along the slide groove on the baffle.

[0006] The guide plate includes a first plate and a second plate, and the first plate and the second plate are connected via a rotating shaft structure.

[0007] Wherein, the side surface of the guide plate has a first bolt component, which is connected to the rotating shaft structure and is used to adjust the tightness of the rotating shaft structure.

[0008] The area of the first plate is smaller than that of the second plate, and the first plate is arranged far from the extraction end of the guide plate.

[0009] Among them, there are two sliding grooves, which are arranged oppositely on both sides of the bottom surface of the baffle.

[0010] Among them, the sliding groove is formed by connecting an L-shaped part to the bottom surface of the baffle.

[0011] Among them, the side surface of the deflector has a second bolt member, and a sliding limit groove with both ends closed and cooperating with the second bolt member is formed on the vertical surface of the sliding groove.

[0012] Among them, the side surface of the deflector has a clamping block for clamping the deflector and the baffle to prevent it from sliding out when the deflector is in the retracted state, and a clamping groove corresponding to the clamping block is provided on the baffle.

[0013] Among them, the clamping groove is arranged at one end of the sliding groove.

[0014] In the second aspect of the present utility model, a coating oven is provided, including the above-mentioned lithium battery coating oven air box baffle structure.

[0015] The lithium battery coating oven air box baffle structure of the present utility model, through the cooperation of its baffle and deflector, can utilize the pull-out property of the deflector, extend the deflector, and increase the blocking area; and can adjust the angle of the deflector by folding the deflector into a preset angle after pulling it out, guide the air flow to the right material area with low dryness on the left for heat flow compensation, thereby optimizing the overall transverse drying uniformity of the pole piece, optimizing the coating process by precisely controlling the air flow, improving the production efficiency and product quality, and improving the cracking defect. Description of the Drawings

[0016] Figure 1 is a schematic diagram of the lithium battery coating oven air box baffle structure of the present utility model.

[0017] Figure 2 is a schematic diagram after the deflector of the lithium battery coating oven air box baffle structure of the present utility model is pulled out.

[0018] Figure 3 is a schematic diagram after the deflector of the lithium battery coating oven air box baffle structure of the present utility model is pulled out and tilted downward for adjustment.

[0019] Figure 4 is a schematic diagram after the deflector is stored in the baffle of the present utility model.

[0020] Figure 5 is a schematic diagram of the deflector of the present utility model.

[0021] Description of the Reference Numerals:

[0022] 1. Coating air box, 2. Jet air nozzle, 3. Air box slide rail, 4. Baffle, 5. Baffle push-pull block, 6. Deflector, 7. Second bolt member, 8. First bolt member, 9. Sliding limit groove, 10. Deflector block, 11. Card slot, 12. Rotating shaft mechanism, 41. Chute. Detailed implementation mode

[0023] The present utility model will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0024] Please refer to Figures 1 to 5 As shown, a baffle structure for a lithium battery coating oven air box includes a baffle 4, the baffle 4 is assembled on the air box slide rail 3 of the coating air box 1, a deflector 6 folded at a preset angle is assembled in a drawable manner at the bottom of the baffle, the deflector 6 can be pulled out or retracted along the chute 41 on the baffle, there are two air box slide rails 3, which are arranged at intervals in the width direction, the upper end of the baffle has a slide rail groove matched with the air box slide rail 3, the coating air box 1 includes a jet air nozzle 2 or an air nozzle for blowing hot air or hot air for drying the electrode sheet, and the baffle is located below the air nozzle and can be used to block the direct impact of hot air, that is, to prevent the air from directly impacting the electrode sheet.

[0025] In the embodiment of the present application, the baffle is pre-connected to the air box slide rails 3 on both sides of the air box, the position of the baffle can be flexibly adjusted, and the deflector can be flexibly combined with the baffle for use. When there is no need for combination, it can be the length of a single baffle. When there is a combination requirement, the deflector can be combined through the reserved chute on the baffle to increase the superimposed length of the baffle, and the angle of the deflector can be adjusted. When no external force is applied, it can maintain the original position; by adjusting the angle after the baffle is stretched, the uneven drying area of the electrode sheet can be compensated for heat by adjusting the angle of the baffle deflector to conduct air flow.

[0026] Specifically, in use, the size of the baffle can be adjusted according to the coating width of different models, and it can be combined with deflectors of different sizes.

[0027] In some embodiments, the deflector includes a first plate 61 and a second plate 62, the first plate and the second plate are connected by a rotating shaft structure 12 or a hinge structure, so that the deflector can be rotated along the axis center of the rotating shaft structure to be folded at a certain angle, so as to realize the angle adjustment of the deflector, so that the baffle can be flexibly adjusted in a telescopic manner, thereby guiding the air flow and improving the adjustment window of the oven.

[0028] In some embodiments, a first bolt member 8 may be arranged on the side surface of the deflector and connected to the rotating shaft structure 12 to adjust the tightness or damping of the rotating shaft structure. The first bolt member 8 can adjust the damping of the rotating shaft structure. After the angle can be adjusted in place, it can maintain its original position without external force applied. Before installation, the first bolt 8 can be adjusted so that the rotating shaft mechanism 12 has a certain damping and remains unchanged without external force applied.

[0029] In some embodiments, the area of the first plate 61 is smaller than the area of the second plate 62. The first plate is arranged far from the extraction end of the deflector. The sizes of the first plate and the second plate are adjusted according to the angle size to be adjusted and the deflector direction, etc., and are not limited to the embodiments in the figure.

[0030] In some embodiments, there are two chute 41, which are oppositely arranged on both sides of the bottom surface of the baffle. In a more preferred embodiment, the chute is formed by connecting an L-shaped part to the bottom surface of the baffle.

[0031] In some embodiments, a second bolt member 7 is provided on the side surface of the deflector 6. A sliding limit groove 9 with both ends closed and cooperating with the second bolt member is formed on the vertical surface of the chute 41. During installation, the tightness of the second bolt 7 can be adjusted so that there is a certain damping between it and the sliding limit groove 9, and it remains unchanged without external force applied and will not slide easily.

[0032] In some embodiments, a deflector latch 10 is provided on the side surface of the deflector 6 for clamping the deflector to the baffle to prevent it from sliding out when the deflector is in the retracted state. A card slot 11 cooperating with the deflector latch is provided on the baffle. When the deflector is not needed, it can stay stably in the correct position. The setting of the deflector latch 10 can enable the deflector to be effectively pushed and pulled with a tool to adjust its position, avoiding the risk of scalding caused by contact with the oven during the adjustment process of the deflector. Preferably, the card slot 11 is arranged at one end of the chute.

[0033] Furthermore, baffle push-pull latches 5 with convex structures are arranged on both sides of the baffle 4, which can also enable the baffle to be effectively pushed and pulled with a tool to adjust its position, avoiding the risk of scalding caused by contact with the oven during the adjustment process of the baffle.

[0034] In the structure of the air box baffle of the lithium battery coating oven according to the embodiment of the present application, when in use, the baffle 4 is connected to the deflector 6 through a chute. Under normal conditions, the deflector 6 and the baffle 4 are integrated and used as a single baffle; the single baffle can be pushed along the direction of the air box slide rail 3; when it is necessary to extend the deflector 6 when there is an actual need, a push-pull tool is used to push the clamping block on the deflector along the sliding limit groove to extend the deflector 6, and the angle of the deflector can be flexibly adjusted through the rotating shaft mechanism 12 according to the use requirements.

[0035] In a certain type of negative electrode coating process, the width of the coating material area is 836 mm. After the electrode sheet exits the oven, there is different degrees of drying on both sides of the electrode sheet. The drying degree of the left material area is relatively high, and there are local cracking defects. The drying degree of the electrode sheet in the right material area is relatively low, and the electrode sheet is not completely dried; normally, by adjusting the oven parameters, the original right material area returns to the dry state, but for the original left material area with local cracking, due to the increase in drying capacity, the cracking degree intensifies.

[0036] By installing this baffle device on the jet air nozzles of the oven air box at the corresponding position of the cracked material area, the heat flow impact at the cracked position is blocked, and the cracking of the electrode sheet in the left material area is improved; by using a push-pull tool to push the push-pull clamping block 5 of the baffle, the position of the blocking jet air nozzle is adjusted. If the improvement effect of cracking is not good, the push-pull tool can be further used to horizontally push the deflector clamping block 10 to extend the deflector 6 to further increase the blocking area; and a downward force can be further applied to the deflector clamping block 10, and the angle of the deflector is adjusted through the rotating shaft mechanism 12 of the deflector to guide the air flow to the right material area with low drying degree on the left for heat flow compensation, optimizing the overall transverse drying uniformity of the electrode sheet and improving the cracking defect.

[0037] In the structure of the air box baffle of the lithium battery coating oven according to the embodiment of the present utility model, through the cooperation of its baffle and deflector, the retractable property of the deflector can be utilized to extend the deflector and increase the blocking area; and after the deflector is pulled out, it can be folded into a preset angle to adjust the angle of the deflector, guiding the air flow to the right material area with low drying degree on the left for heat flow compensation, thereby optimizing the overall transverse drying uniformity of the electrode sheet and improving the cracking defect.

[0038] In the second aspect of the embodiment of the present utility model, a coating oven is provided, including the structure of the air box baffle of the lithium battery coating oven described above. The coating oven includes the structure of the air box baffle of the lithium battery coating oven. Its baffle can be adjusted and combined with the deflector. When no combination is required, it can be the length of a single baffle. When there is a need, it can be combined with the deflector through the chute reserved on the original baffle to increase the superposition length of the baffle, with flexible adjustment; after the baffle is stretched, the angle of the deflector can be adjusted through the rotating shaft mechanism of the deflector to play a guiding role, and the unevenly dried area of the electrode sheet is compensated for heat by adjusting the angle of the deflector on the baffle for air flow diversion.

[0039] The foregoing has shown and described the basic principles, main features and advantages of the present utility model. For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above-described exemplary embodiments, and without departing from the spirit or basic features of the present utility model, the present utility model can be implemented in other specific forms;

[0040] Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, it is intended to embrace all changes falling within the meaning and scope of the equivalent elements of the claims in the present utility model.

[0041] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. Structure of the air box baffle of a lithium battery coating oven, characterized in that It includes a baffle, which is assembled on the wind box slide rail of the coating wind box. The bottom of the baffle is pull-out equipped with a guide plate folded into a preset angle, and the guide plate can be pulled out or retracted along the slide groove on the baffle.

2. The baffle structure of the air box of the lithium battery coating oven according to claim 1, characterized in that The guide plate includes a first plate and a second plate, and the first plate and the second plate are connected via a rotating shaft structure.

3. The baffle structure of the air box of the lithium battery coating oven according to claim 2, wherein, The side surface of the guide plate is provided with a first bolt member, which is connected to the rotating shaft structure and is used to adjust the tightness of the rotating shaft structure.

4. The baffle structure of the air box of the lithium battery coating oven according to claim 2, wherein, The area of the first plate is smaller than that of the second plate, and the first plate is arranged far from the extraction end of the guide plate.

5. The baffle structure of the air box of the lithium battery coating oven according to claim 1, wherein, The two sliding grooves are arranged oppositely on two sides of the bottom surface of the baffle.

6. The baffle structure of the air box of the lithium battery coating oven according to claim 1, characterized in that The sliding groove is composed of an L-shaped portion connected to the bottom surface of the baffle.

7. The baffle structure of the air box of the lithium battery coating oven according to claim 1, characterized in that A second bolt member is provided on the side surface of the guide plate, and a sliding limiting groove with closed ends that cooperates with the second bolt member is formed on the vertical surface of the sliding groove.

8. The baffle structure of the air box of the lithium battery coating oven according to claim 1, wherein, The side surface of the guide plate is provided with a clamping block for clamping the guide plate and the baffle to prevent the guide plate from sliding out when the guide plate is in a retracted state, and the baffle is provided with a corresponding clamping groove that cooperates with the clamping block.

9. The baffle structure of the air box of the lithium battery coating oven according to claim 8, characterized in that, The clamping slot is arranged at one end of the sliding slot.

10. Coating oven, characterized in that, The invention comprises the air box baffle structure of the lithium battery coating oven according to any one of claims 1 to 9.

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