Multifunctional die head for optimizing coating and thinning area

Abstract

The utility model relates to a multifunctional die head for optimizing a coating and thinning area, which comprises a rotating shaft and a die lip sealing strip, the rotating shaft is arranged on the side surface of the die head and can rotate parallel to the side surface of the die head, an air cylinder is mounted on the rotating shaft, one end of the air cylinder is fixed on the rotating shaft, and the other end of the air cylinder is connected with a rod end joint bearing; a die lip sealing strip is fixed in the direction perpendicular to the rod end knuckle bearing. The utility model has the advantages that the structure is reasonable, the thinning area is optimized, the material leakage is avoided, the pole pieces with different coating widths can be matched, and the practicability is strong.

Description

Technical Field

[0001] This utility model belongs to the technical field of battery production equipment, specifically relating to a multifunctional die head that optimizes the coating thinning area. Background Technology

[0002] In battery manufacturing, the uniformity of slurry distribution on the current collector during the coating process directly affects the battery's electrical performance. The selection and use of the die and gasket during coating are crucial. The die consists of an upper and lower die, which clamp the gasket to close. The thickness of the gasket creates a gap in the die lip after the die is closed, through which the slurry is discharged and adheres to the current collector. In actual production, when coating electrodes with two or more strips, the die lip gap is integrated, requiring the gasket design to close the necessary electrode tab exit lip gap. However, the gasket design cannot perfectly address this issue during coating. To completely solve this problem, in most cases, the slurry will still self-flow at this location, causing defects. To compensate for this problem, adhesive strips (Teflon) are cut on-site and attached to the corresponding die lip to seal the die lip gap. However, as the slurry is continuously coated, the adhesive strips will be washed away. Only by replacing the adhesive strips frequently and in a timely manner can normal coating be achieved, which greatly reduces production efficiency and product yield. At the same time, some coating equipment in the factory is a double-sided coating machine. When coating the B-side foil, since the B-side has no back roller, the foil lacks support, has poor stability, and poor consistency in the thinning area of ​​the coating. This can easily cause lithium plating in the battery cell later, affecting the battery cell performance.

[0003] On the other hand, there are downtimes during production. To prevent the slurry in the die head from settling, the slurry is kept circulating from the supply pipe to the die head and backflow pipe. At this time, the die lip gap needs to be blocked to ensure smooth slurry return and prevent leakage. The traditional method is to block the die lip gap by contacting the coating back roller. However, this method is prone to leakage or die lip wear because the contact pressure is difficult to control. In addition, due to the limitations of some coating equipment, the coating die head does not have a back roller and can only be simply wrapped with a baffle, which has poor sealing performance and serious leakage, making it unsuitable for long-term downtime. Therefore, it is necessary to provide a multi-functional die head with a reasonable structure, optimized thinning zone, prevention of leakage, compatibility with electrodes of different coating widths, and high practicality that optimizes the coating thinning zone. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a multi-functional die head with a reasonable structure, optimized thinning zone, avoidance of material leakage, ability to match electrode sheets with different coating widths, and strong practicality, which optimizes the coating thinning zone.

[0005] The purpose of this utility model is achieved as follows: a multifunctional die head for optimizing the coating thinning zone, comprising a rotating shaft and a die lip seal, wherein the rotating shaft is disposed on the side of the die head and can rotate parallel to the side of the die head, a cylinder is mounted on the rotating shaft, one end of the cylinder is fixed to the rotating shaft and the other end is connected to a rod end joint bearing; a die lip seal is fixed in a direction perpendicular to the rod end joint bearing.

[0006] The rod end spherical bearing can be elastically stretched along the cylinder direction.

[0007] A limit screw is provided below the rod end spherical bearing to provide support when the rod end spherical bearing falls due to gravity.

[0008] A baffle plate is attached to the mold lip sealing bar, and the baffle plate is installed on the rod end spherical bearing by a baffle plate fixing component.

[0009] The baffle fixing component has four screws attached to it, of which the two screws at the bottom are used to fix the baffle fixing component after adjusting its horizontal position, which can match the electrode with different coating widths.

[0010] The two screws on the top of the baffle fixing component are removable, allowing for the replacement of baffles with different requirements, thus achieving compatibility with different coating thinning zone optimization needs.

[0011] The outer layer of the mold lip seal and the inner side of the baffle are both made of silicone or soft foam.

[0012] The beneficial effects of this utility model are as follows: This utility model is a multifunctional die head that optimizes the coating thinning zone. During use, the die lip of this utility model affects the self-flow state of the slurry in the thinning zone by adding a baffle. The position of the baffle can be adjusted by horizontal displacement of the baffle fixing component and by changing the baffle specification, thus being compatible with different coating width requirements. The baffle of this utility model is easy to disassemble and is compatible with different coating requirements. The die lip of this utility model has a self-sealing function to prevent material leakage and has strong sealing performance. This utility model uses silicone or soft foam material to avoid damage caused by hard contact with the die lip. This utility model has the advantages of reasonable structure, optimized thinning zone, prevention of material leakage, compatibility with electrodes of different coating widths, and strong practicality. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0014] Figure 2 This utility model Figure 1 Partial structural diagram Figure 1 .

[0015] Figure 3 This utility model Figure 1 Partial structural diagram Figure 2 .

[0016] In the diagram: 1. Rotary shaft; 2. Cylinder; 3. Rod end spherical bearing; 4. Limit screw; 5. Baffle fixing piece; 6. Baffle; 7. Mold lip seal. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings. Example

[0018] like Figure 1-3 As shown, a multifunctional die head for optimizing the coating thinning area includes a rotating shaft 1 and a die lip seal 7. The rotating shaft 1 is disposed on the side of the die head and can rotate parallel to the side of the die head. A cylinder 2 is mounted on the rotating shaft 1. One end of the cylinder 2 is fixed to the rotating shaft 1 and the other end is connected to a rod end joint bearing 3. The die lip seal 7 is fixed in a direction perpendicular to the rod end joint bearing 3.

[0019] Due to the characteristics of cylinder 2, the rod end joint bearing 3 can be elastically stretched along the direction of cylinder 2.

[0020] A limit screw 4 is provided below the rod end spherical bearing 3 to provide support when the rod end spherical bearing 3 falls due to gravity.

[0021] A baffle plate 6 is attached to the rod of the die lip seal 7, and the baffle plate 6 is installed on the rod end joint bearing 3 by the baffle plate fixing member 5.

[0022] In this embodiment, ① when the die head is in working condition, the rod end spherical bearing 3 is pulled outward, and then the vertical displacement adjustment baffle fixing member 5 is at a suitable height. Then the pulling action of the rod end spherical bearing 3 is canceled. At this time, the baffle 6 is located at the die lip height (see Figure 2 Since the die lip seal 7 and the baffle 6 fixed on the baffle fastener 5 are at different distances from the die head, the die lip seal 7 contacts the die head first. Due to the cylinder 2, it provides support for the overall limit, and the limit screw 4 enhances the support and stabilizes the equipment. At this time, the die head is coated, and the thinning area is optimized.

[0023] ② When the die head is not in operation, pull the rod end spherical bearing 3 outward, then adjust the die lip seal 7 to a suitable height by vertical displacement. Then cancel the pulling action of the rod end spherical bearing 3. At this time, the die lip seal 7 is located at the die lip height (see...). Figure 3 Due to the cylinder 2, it provides support for the overall limit, and the limit screw 4 enhances the support and stabilizes the equipment; at this time, the die head equipment circulates the slurry, and the die lip is completely sealed to avoid material leakage.

[0024] This invention relates to a multifunctional die head that optimizes the coating thinning zone. During use, a baffle is added to the die lip to influence the self-flowing state of the slurry in the thinning zone. The position of the baffle 6 can be adjusted by horizontal displacement of the baffle fixing component 5 and by changing the baffle 6 specification, accommodating different coating width requirements. The baffle 6 is easy to disassemble and compatible with different coating needs. The die lip of this invention has a self-sealing function to prevent material leakage and provides strong sealing. This invention uses silicone or soft foam material to avoid damage caused by hard contact with the die lip. This invention has the advantages of reasonable structure, optimized thinning zone, prevention of material leakage, compatibility with electrodes of different coating widths, and high practicality. Example

[0025] like Figure 1-3 As shown, a multifunctional die head for optimizing the coating thinning area includes a rotating shaft 1 and a die lip seal 7. The rotating shaft 1 is disposed on the side of the die head and can rotate parallel to the side of the die head. A cylinder 2 is mounted on the rotating shaft 1. One end of the cylinder 2 is fixed to the rotating shaft 1 and the other end is connected to a rod end joint bearing 3. The die lip seal 7 is fixed in a direction perpendicular to the rod end joint bearing 3.

[0026] The baffle fixing member 5 is attached with four screws, the two screws at the bottom of which are used to fix the baffle fixing member 5 after adjusting its horizontal position, so as to match the electrode with different coating widths.

[0027] The two screws on the top of the baffle fixing member 5 are detachable, which can be used to replace the baffle 6 with different requirements to achieve compatibility with different coating thinning zone optimization needs.

[0028] In this embodiment, in order to match electrodes with different coating widths, four screws are attached to the baffle fixing member 5. The two lower screws are used to fix the baffle fixing member 5 after adjusting its horizontal position. In order to accommodate different coating thinning zone optimization requirements, the two upper screws on the baffle fixing member 5 are removable and used to replace the baffle 6 with different requirements.

[0029] The outer layer of the mold lip seal 7 and the inner side of the baffle 6 are both made of silicone or soft foam.

[0030] In this embodiment, to avoid hard contact damage caused by direct contact with the mold lip, the outer layer of the mold lip seal 7 and the inner side of the baffle 6 are both made of materials such as silicone or soft foam.

[0031] This invention relates to a multifunctional die head that optimizes the coating thinning zone. During use, a baffle is added to the die lip to influence the self-flowing state of the slurry in the thinning zone. The position of the baffle 6 can be adjusted by horizontal displacement of the baffle fixing component 5 and by changing the baffle 6 specification, accommodating different coating width requirements. The baffle 6 is easy to disassemble and compatible with different coating needs. The die lip of this invention has a self-sealing function to prevent material leakage and provides strong sealing. This invention uses silicone or soft foam material to avoid damage caused by hard contact with the die lip. This invention has the advantages of reasonable structure, optimized thinning zone, prevention of material leakage, compatibility with electrodes of different coating widths, and high practicality.

Claims

1. A multi-functional die for optimizing the coating of a land area, comprising a spin axis and a die lip seal, characterized in that: The rotating shaft is arranged on the side of the die head and can rotate parallel to the side of the die head, a cylinder is arranged on the rotating shaft, one end of the cylinder is fixed on the rotating shaft, and one end of the cylinder is connected with a rod end joint bearing; a die lip sealing strip is fixed vertically to the direction of the rod end joint bearing.

2. A multi-functional die for optimizing the coating and thinning zone as claimed in claim 1, wherein: The rod end joint bearing can be elastically stretched along the direction of the cylinder.

3. A multi-functional die for optimizing the coating and thinning zone as claimed in claim 2, wherein: A limiting screw is arranged below the rod end joint bearing to provide support when the rod end joint bearing falls due to gravity.

4. A multi-functional die for optimizing the coating and thinning zone as claimed in claim 3, wherein: A baffle is attached to the rod of the die lip sealing strip, and the baffle is arranged on the rod end joint bearing through a baffle fixing piece.

5. A multi-functional die for optimizing the coating and thinning zone as claimed in claim 4, wherein: Four screws are attached to the baffle fixing piece, wherein the lower two screws are used to fix the horizontal position of the baffle fixing piece after adjustment, and can match the pole pieces of different coating widths.

6. A multi-functional die for optimizing the coating and thinning zone as claimed in claim 5 wherein: The upper two screws of the baffle fixing piece can be detached, and are used to replace baffles of different requirements to realize compatibility with different coating thinning area optimization requirements.

7. A multi-functional die for optimizing the coating and thinning zone as claimed in claim 4 wherein: Silica gel or soft foam material is used for the outer layer of the die lip sealing strip and the inner side of the baffle.

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