Cathode coated edge skiving gasket

Abstract

The utility model discloses a cathode coating edge thinning gasket, and relates to the technical field of coating tools. The cathode coating edge thinning gasket comprises a main gasket body, a plurality of auxiliary gasket bodies are movably connected to the two sides of the main gasket body in a clamped mode, T-shaped telescopic pieces are movably connected to the interiors of the auxiliary gasket bodies in a clamped mode, and scales and locking devices are arranged at the tails of the T-shaped telescopic pieces. According to the negative electrode coating edge thinning gasket, through the design of the main gasket body, the auxiliary gasket body and the T-shaped telescopic piece, the model of the auxiliary gasket body is easy to replace, and therefore it is guaranteed that the whole gasket composed of the main gasket body and the auxiliary gasket body is suitable for various products to use, cost is low, replacement is convenient, and the effect of rapidly adjusting slurry thinning is achieved under the condition that a die head is not disassembled.

Description

Technical Field

[0001] The utility model relates to the technical field of coating tools, in particular to a negative electrode coating edge thinning gasket. Background Art

[0002] In order to achieve effective control of the thinning of the edge flow areas on both sides of the slurry during the negative electrode coating process, and to prevent the thick edges from being crushed by the roller, the negative electrode graphite accommodates lithium ion holes and reduces lithium deposition in the corresponding area. Therefore, the reasonable design and optimization of the lithium battery coating adjustable gasket and control method are of great significance to the field of lithium ion battery technology.

[0003] In the patent with publication number CN220861894U, a gasket is designed. The step of the chamfered part of the gasket is designed to be a combination of a groove and an adjusting piece. The edge overflow is controlled by the extended length of the adjusting piece, thereby controlling the edge thinning amount. The disadvantage of this design is that it is necessary to open the die head for adjustment when adjusting the thinning, which is cumbersome to operate; and a gasket has only one opening size, which cannot meet the coating needs of various models of products. Therefore, the disadvantages of the existing technology are: 1. The coating gasket is a whole. If the chamfer of the gasket is worn, the entire gasket needs to be replaced, which increases material costs; 2. When the production line involves the replacement of the electrode size or the production of slurries with different viscosities, the production line needs to be equipped with a variety of gaskets with different opening sizes and different chamfer sizes to meet production needs, which increases material and storage costs; 3. When the batching process When the viscosity of the incoming material changes, the mold needs to be removed and the gasket needs to be replaced to adjust the thinning of the edge casting area; 4. Disadvantages of removing the die head to adjust the gasket: Disadvantage 1: The slurry inside the die head needs to be cleaned, resulting in the scrapping of the slurry; Disadvantage 2: The coating die head is a high-precision device, and repeated disassembly and assembly can easily cause the die head to bump, resulting in coating defects; Disadvantage 3: The disassembly and assembly of the die head involves bolts and gaskets, which takes a long time, and after completion, the die head needs to be circulated and exhausted, which seriously affects production efficiency; 5. The thinning flow edges corresponding to different slurries are quite different, and repeated adjustments are required, and the coating die head needs to be disassembled and assembled frequently. 6. The accuracy of controlling the edge thinning area by replacing gaskets with different chamfered steps is poor. In response to the shortcomings of the existing technology, the utility model provides a negative electrode coating edge thinning gasket to solve the above problems. Utility Model Content

[0004] In response to the shortcomings of the existing technology, the utility model provides a negative electrode coating edge thinning gasket. Through the design of the main gasket, auxiliary gasket and T-shaped expansion piece, the auxiliary gasket is easy to replace the model, thereby ensuring that the gasket composed of the main gasket and the auxiliary gasket is suitable for various products as a whole. It has low cost and is easy to replace, and can achieve the effect of quickly adjusting the slurry thinning without disassembling the die head.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: a negative electrode coating edge thinning gasket, comprising a main gasket, a plurality of auxiliary gaskets movably connected to both sides of the main gasket, and a T-shaped expansion piece movably connected inside the auxiliary gasket;

[0006] The tail of the T-shaped expansion piece is provided with a scale and a locking device.

[0007] Preferably, the auxiliary gasket is provided with a chamfer, and the device realizes coating of products of different widths by designing auxiliary gaskets of different chamfers and sizes to engage with the main gasket.

[0008] Preferably, the main gasket is provided with multiple groups of mounting holes.

[0009] Preferably, a positioning hole is provided on the main gasket.

[0010] Preferably, a card slot is provided on the main gasket, and a wedge-shaped card block is provided on the auxiliary gasket, and the wedge-shaped card block is movably engaged in the card slot.

[0011] Preferably, the auxiliary gasket is provided with a groove slide corresponding to the T-shaped expansion piece, and the length of the T-shaped expansion piece protruding from the auxiliary gasket is controlled by pushing and pulling the tail of the T-shaped expansion piece, so as to achieve the effect of quickly adjusting the slurry thinning without disassembling the die head.

[0012] Preferably, the number of the wedge-shaped blocks and the card slots are both set to two or more.

[0013] Preferably, the locking device includes a threaded hole formed on the T-shaped expansion piece and a locking screw threadedly connected to the threaded hole, and a rubber ring is sleeved on the locking screw.

[0014] The utility model discloses a negative electrode coating edge thinning gasket, which has the following beneficial effects:

[0015] The negative electrode coating edge thinning gasket has the following features: 1. The main gasket is designed, and the chamfered step portion is designed as a sub-gasket. A set of gaskets consists of a main gasket and multiple sub-gaskets. When the gasket is worn, there is no need to replace the entire gasket, saving costs. 2. When the gasket chamfer is worn or the production of pole pieces of different widths requires various gasket openings and chamfered shapes, multiple sub-gaskets of different sizes can be directly designed, greatly reducing the material and gasket storage costs; 3. The sub-gasket includes a T-shaped expansion piece with scale adjustment. For slurries with different viscosities and solid contents, the coating pole piece thinning area control can be quickly adjusted without removing the die head, and the control is precise; 4. The main gasket and the sub-gasket are wedge-shaped connected to ensure the connection strength; 5. The thinning control is reduced due to the influence of the incoming slurry, and the number of die cleaning times and slurry scrapping is reduced; 6. The production efficiency is improved and the safety risk factor of the disassembly and assembly of the die head of the high-precision coating equipment is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the connection of the auxiliary gasket of the utility model;

[0018] Figure 3 This is a schematic structural diagram of the auxiliary gasket of the utility model;

[0019] Figure 4 This is a schematic structural diagram of the T-shaped expansion piece of the utility model;

[0020] Figure 5 This is a schematic structural diagram of the locking device of the utility model.

[0021] In the figure: 1-main gasket; 11-mounting hole; 12-positioning hole; 13-slot; 2-secondary gasket; 21-wedge-shaped block; 22-groove slide; 3-T-type expansion piece; 31-scale; 32-locking device; 321-threaded hole; 322-locking screw.

[0022] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0023] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0024] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like, indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operate in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0025] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections, direct connections, or indirect connections through an intermediate medium; they may refer to internal communication between two components or the interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0026] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0027] The embodiment of the present application provides a negative electrode coating edge thinning gasket, which solves the disadvantage of the existing gasket design that the die head needs to be opened for adjustment during thinning, which is a cumbersome operation.

[0028] In order to better understand the above technical solution, the above technical solution will be described in detail below with reference to the accompanying drawings and specific implementation methods.

[0029] The utility model discloses a negative electrode coating edge thinning gasket, according to the attached Figure 1-5 As shown, it includes a main gasket 1, a plurality of auxiliary gaskets 2 are movably connected on both sides of the main gasket 1, and a T-shaped expansion piece 3 is movably connected inside the auxiliary gasket 2;

[0030] The tail of the T-shaped expansion piece 3 is provided with a scale 31 and a locking device 32; the locking device 32 includes a threaded hole 321 opened on the T-shaped expansion piece 3 and a locking screw 322 threadedly connected to the threaded hole 321, and a rubber ring is sleeved on the locking screw 322.

[0031] The auxiliary gasket 2 is provided with a chamfer. The device realizes coating of products of different widths by designing auxiliary gaskets 2 of different chamfers and sizes to engage with the main gasket 1.

[0032] The main gasket 1 is provided with multiple groups of mounting holes 11 and positioning holes 12. The design of the mounting holes 11 and the positioning holes 12 facilitates the installation of the main gasket 1 and the die head.

[0033] A card slot 13 is provided on the main gasket 1, and a wedge-shaped card block 21 is provided on the auxiliary gasket 2. The wedge-shaped card block 21 is movably engaged in the card slot 13. The engagement between the main gasket 1 and the auxiliary gasket 2 is convenient and stable. When engaging, the wedge-shaped card block 21 can be directly engaged in the card slot 13.

[0034] The number of the wedge-shaped clamping blocks 21 and the clamping slots 13 is set to two or more, thereby increasing the clamping stability between the main gasket 1 and the auxiliary gasket 2.

[0035] A groove slide 22 corresponding to the T-shaped expansion piece 3 is provided on the auxiliary gasket 2. By pushing and pulling the tail of the T-shaped expansion piece 3, the length of the T-shaped expansion piece 3 protruding from the auxiliary gasket 2 is controlled, so as to achieve the effect of quickly adjusting the slurry thinning without disassembling the die head.

[0036] The negative electrode coating edge thinning gasket is installed on the upper die head, confirming that the leading edge of the main gasket 1 is flush with the die head lip, fixing the main gasket 1 with bolts, connecting the two auxiliary gaskets 2 to the main gasket 1 through the snap fit of the wedge-shaped block 21 and the card slot 13, placing the T-shaped expansion piece 3 in the groove slide 22 of the auxiliary gasket 2, confirming the starting position reading of the T-shaped expansion piece 3, and adjusting the left and right distance movement of the T-shaped expansion piece 3 by stretching the T-shaped expansion piece 3 and cooperating with the locking device 32. The locking device 32 is used to realize the tightening or loosening of the position of the T-shaped expansion piece 3 in the groove slide 22;

[0037] Close the upper and lower die heads and tighten the T-shaped expansion piece 3 through the locking device 32 to form a central coating area and a thinned coating area at the edge of the inner cavity;

[0038] The slurry is coated from the die lip to the collector surface through the cavity in the mold. During the debugging process, the edge thinning amount is calculated based on the thickness of the tail-checked electrode. The thinning amount is calculated by subtracting the edge thickness from the thickness of the middle area. The T-shaped expansion piece 3 is fine-tuned to control the edge casting amount of the slurry to achieve rapid adjustment of the thinning area. The tail scale 31 is convenient for recording the adjustment amount to achieve precise control.

[0039] Example 1:

[0040] Before the coating production line is changed for the first time for mass production, when the coating width and the viscosity of the slurry involved change, after the production line is cleaned, the main gasket 1 in the die head remains unchanged, and the sub-gasket 2 is replaced with the sub-gasket 2 of the corresponding design size after the change. After the mold is closed, a group of single and double test pieces of about 30 meters in length can be coated. If the trial coating size does not meet the standard, multiple sets of sub-gaskets 2 with different types of chamfers are replaced for rapid verification. After the size meets the standard, mass production can be carried out, and the current sub-gasket 2 size is solidified and recorded to reduce verification before the next change.

[0041] Example 2

[0042] After mass production of coating, the edge thinning amount is measured by the staff at the end of the inspection. If the thinning amount exceeds or falls below the process standard, the T-type expansion piece 3 needs to be adjusted;

[0043] After the treadmill is in the state of being stretched, the treadmill 31 of the present invention is tightened, and the treadmill 31 of the present invention is tightened, and the treadmill 31 of the present invention is tightened.

[0044] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A negative electrode coating edge thinning gasket, comprising a main gasket, characterized in that: A plurality of auxiliary gaskets are movably connected on both sides of the main gasket, and a T-shaped expansion piece is movably connected inside the auxiliary gasket; The tail of the T-shaped expansion piece is provided with a scale and a locking device.

2. The negative electrode coating edge thinning gasket according to claim 1, characterized in that: The auxiliary gasket is provided with a chamfer.

3. The negative electrode coating edge thinning gasket according to claim 2, characterized in that: The main gasket is provided with a plurality of mounting holes.

4. The negative electrode coating edge thinning gasket according to claim 3, characterized in that: The main gasket is provided with a positioning hole.

5. The negative electrode coating edge thinning gasket according to claim 4, characterized in that: The main gasket is provided with a card slot, and the auxiliary gasket is provided with a wedge-shaped card block, and the wedge-shaped card block is movably connected in the card slot.

6. The negative electrode coating edge thinning gasket according to claim 1, characterized in that: The auxiliary gasket is provided with a groove slideway corresponding to the T-shaped expansion piece.

7. The negative electrode coating edge thinning gasket according to claim 5, characterized in that: The number of the wedge-shaped clamping blocks and the clamping slots is set to two or more.

8. The negative electrode coating edge thinning gasket according to claim 1, characterized in that: The locking device comprises a threaded hole provided on the T-shaped expansion piece and a locking screw threadedly connected in the threaded hole, and a rubber ring is sleeved on the locking screw.

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