Coating gasket capable of preventing material leakage

Abstract

The utility model discloses a coating gasket for preventing material leakage, which comprises a gasket body, two sides of the gasket body are respectively provided with a limiting plate, the limiting plates are fixedly connected with the gasket body, a plurality of shunting blocks are arranged between the two limiting plates, a first accommodating cavity is formed between the limiting plates and the shunting blocks, and the first accommodating cavity is communicated with the limiting plates. A second containing cavity is formed between every two flow dividing blocks, and each flow dividing block is provided with a conical groove. The limiting plates are arranged at the two ends of the gasket body, the multiple flow dividing blocks are arranged in the limiting plates, the second containing cavities are formed between every two flow dividing blocks, the first containing cavities are formed between the limiting plates and the flow dividing blocks, and the conical grooves are formed in the flow dividing blocks, so that the first containing cavities and the second containing cavities can communicate with each other through the conical grooves; and the slurry leakage at the tab in the pole piece coating process caused by overhigh pressure in the slurry in the single first or second accommodating cavity is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of battery production, and particularly relates to a coating gasket for preventing material leakage. Background Art

[0002] Lithium battery industry coating is to evenly coat the prepared slurry on copper foil or aluminum foil in a continuous or intermittent manner. Among them, extrusion coating has the advantages of high production efficiency and high coating consistency, and is widely used in the current lithium battery industry coating process.

[0003] In the mechanized coating of lithium batteries, the existing gasket has only a single chamber to store the slurry, resulting in low uniformity of the slurry coated on the electrode. Although some existing chambers adopt sub-cavities to improve the uniformity of coating, the chambers cannot be connected to each other. There is a situation where the pressure in a single chamber is too high. The coating pressure during the electrode coating process is too high, resulting in leakage at the electrode ear, and the processing qualification rate is low. Utility Model Content

[0004] In order to solve the above problems existing in the prior art, the purpose of the present invention is to provide a coating gasket that prevents material leakage.

[0005] The technical solution adopted by the present invention is: it includes a gasket body, and a limit plate is respectively provided on both sides of the gasket body, and the limit plate is fixedly connected to the gasket body. A plurality of diverter blocks are provided between the two limit plates, and a first accommodating cavity is formed between the limit plate and the diverter block, and a second accommodating cavity is formed between every two diverter blocks. A conical groove is provided on each diverter block, and the first accommodating cavity and the second accommodating cavity are connected through the conical groove.

[0006] As a preferred embodiment of the present invention, the thickness of the limiting plate and the diverter block are equal, the two side surfaces of the conical groove are inclined, the distance from the starting point of the conical groove inclined surface to the lower end surface of the diverter block is higher than the distance from the end point of the conical groove inclined surface to the lower end surface of the diverter block, and the slurry in the first accommodating chamber and the second accommodating chamber can flow with each other through the conical groove.

[0007] As a preferred embodiment of the present invention, the tapered groove has a length of 40 mm and a height of 8 mm, and the taper angle of the tapered groove is 60°.

[0008] As a preferred embodiment of the present invention, a mounting hole is provided on the gasket body, and the mounting hole passes through the gasket body, and the mounting hole is used for fixing the gasket body and the coating machine.

[0009] As a preferred embodiment of the present invention, there are multiple mounting holes, and the multiple mounting holes are equidistantly distributed along the length direction of the gasket body.

[0010] As a preferred embodiment of the present invention, protrusions are provided at both ends of the gasket body, the protrusions are fixedly connected to the gasket body, and the upper and lower end surfaces of the protrusions are flush with the upper and lower end surfaces of the gasket body.

[0011] As a preferred embodiment of the present invention, the gasket body, the diverter block and the limit plate are an integrated structure.

[0012] The beneficial effects of the utility model are:

[0013] 1. The utility model is a coating gasket that prevents leakage. By arranging limit plates at both ends of the gasket body and arranging multiple diversion blocks in the limit plates, a second accommodating chamber is formed between every two diversion blocks, and a first accommodating chamber is formed between the limit plates and the diversion blocks. By opening a conical groove on the diversion block, the first accommodating chamber and the second accommodating chamber can circulate with each other through the conical groove, avoiding excessive pressure in the slurry in a single first or second accommodating chamber, which may cause leakage at the pole ear during the pole piece coating process, thereby improving the uniformity of slurry coating.

[0014] 2. By setting the two sides of the tapered groove into inclined surfaces, the inclined surfaces provide space for the flow of slurry. At the same time, the inclined setting toward the lower end can prevent the slurry in the accommodating cavity from flowing into another accommodating cavity during the processing, resulting in a lack of slurry in one of the accommodating cavities. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention will be further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0016] Figure 1 It is a structural diagram of the utility model;

[0017] Figure 2 This utility model Figure 1 A schematic diagram of the enlarged structure at point A;

[0018] Figure 3 It is a schematic diagram of the working principle structure of the utility model.

[0019] In the figure: 1. Gasket body; 2. Diverter block; 3. Limiting plate; 4. First accommodating cavity; 5. Second accommodating cavity; 6. Conical groove; 7. Conical groove inclined surface; 8. Mounting hole; 9. Protrusion; 10. Upper mold; 11. Lower mold; 12. Base material; 13. Roller; 14. Slurry. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for the purpose of explaining the present invention and are not intended to limit the present invention. That is, the embodiments described herein are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and illustrated in the drawings herein can be arranged and designed in a variety of different configurations.

[0021] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative work are within the scope of protection of the present invention.

[0022] The following combination Figure 1-3 The specific embodiment of the present utility model is described. A coating gasket for preventing leakage includes a gasket body 1. The gasket body 1 stores and guides the inflowing slurry 14. Limiting plates 3 are respectively provided on both sides of the gasket body 1. The limiting plates 3 are used to be installed and matched with the coating machine so that the gasket can be detachably installed on the coating machine. The limiting plates 3 are fixedly connected to the gasket body 1. A plurality of diverter blocks 2 are provided between the two limiting plates 3. A first accommodating chamber 4 is formed between the limiting plates 3 and the diverter blocks 2. A second accommodating chamber 5 is formed between every two diverter blocks 2. A conical groove 6 is provided on each diverter block 2. The first accommodating chamber 4 and the second accommodating chamber 5 are connected through the limiting plates 3. The conical grooves 6 are interconnected. Through the setting of the limit plate 3 and the diverter block 2, the gasket body 1 is divided into multiple second accommodating chambers 5 and multiple first accommodating chambers 4 along the length direction of the gasket body 1. The multiple first accommodating chambers 4 and the second accommodating chambers 5 can partition the inflowing slurry 14 for storage and coating on the substrate 12. The diverter block 2 is provided with a conical groove 6. The conical groove 6 connects every two second accommodating chambers 5, or the first accommodating chamber 4 and the second accommodating chamber 5, to avoid excessive internal pressure in one of the first accommodating chambers 4 or the second accommodating chamber 5 due to excessive inflow of slurry 14, avoid leakage of slurry 14 at the tab coating, make the coated slurry 14 flow out evenly, and improve the coating quality.

[0023] Advantageously, the thickness of the limiting plate 3 and the diverter block 2 are equal. In the actual use of the gasket body 1, by clamping the gasket body 1 between the upper die 10 and the lower die 11 in the coating machine, the slurry 14 is transported from the tube body in the lower die 11 to the gasket body 1, and the slurry 14 is coated on the peripheral surface of the substrate 12 through the cooperation of each first accommodating cavity 4 and the second accommodating cavity 5 with the nozzle, so as to realize the coating of the slurry 14. The two side surfaces of the tapered groove 6 are inclined, and the tapered groove is inclined. The distance from the starting point of the surface 7 to the lower end surface of the diverter block 2 is higher than the distance from the end point of the tapered groove inclined surface 7 to the lower end surface of the diverter block 2. The slurry 14 in the first accommodating chamber 4 and the second accommodating chamber 5 can flow with each other through the tapered groove 6. The tapered groove 6 is used to connect the slurry 14 in each accommodating chamber. The inclined surface on the side of the tapered groove 6 is set to prevent all the slurry 14 in the accommodating chamber from flowing out through the tapered groove 6, resulting in a lack of slurry 14 in a certain accommodating chamber and the inability to coat the substrate 12.

[0024] Beneficially, the length of the conical groove 6 is 40 mm for the first accommodating cavity, the height of the mounting hole is 8 mm, and the taper of the conical groove bevel 7 is 60°. In other embodiments, the size parameters of the conical groove 6 can be adjusted according to the actual requirements of the coating to achieve the best coating effect of the slurry 14.

[0025] Advantageously, a mounting hole 8 is provided on the gasket body 1, and the mounting hole 8 passes through the gasket body 1. The mounting hole 8 is used to fix the gasket body 1 and the coater. The gasket body 1 is installed between the upper mold 10 and the lower mold 11 by using bolts passing through the mounting hole 8, thereby achieving installation coordination with the coater.

[0026] Advantageously, there are a plurality of mounting holes 8 , which are evenly distributed along the length of the gasket body 1 . The plurality of mounting holes 8 can improve the stability of the fixation between the upper die 10 and the lower die 11 .

[0027] Advantageously, protrusions 9 are provided at both ends of the gasket body 1, and the protrusions 9 are fixedly connected to the gasket body 1. The upper and lower end faces of the protrusions 9 are flush with the upper and lower end faces of the gasket body 1, and the protrusions 9 are used for installation cooperation with the upper mold 10 and the substrate 12.

[0028] Advantageously, the gasket body 1 , the diverter block 2 and the limit plate 3 are an integrated structure, serving as a coating component of a coating machine.

[0029] Working principle of this utility model:

[0030] The gasket body 1 is installed between the lower mold 11 and the upper mold 10. The installation connection of the gasket body 1 is achieved by using fixing bolts to pass through the upper mold 10, the mounting hole 8 and the lower mold 11 in sequence. During installation, the conical groove 6 on the shunt block 2 is close to the side of the substrate 12. The positive electrode slurry 14 or the negative electrode slurry 14 flows into each first accommodating cavity 4 and the second accommodating cavity 5 on the gasket body 1 through the delivery pipe in the lower mold 11. The slurry 14 is under the pressure between the upper mold 10 and the lower mold 11. At the same time, the nozzle at one end of the shunt block 2 is cooperated. The slurry 14 in the first accommodating cavity 4 and the second accommodating cavity 5 is coated on the surface of the substrate 12 by the nozzle. The substrate 12 rotates clockwise under the drive of the roller 13 and the motor to achieve continuous coating of the substrate 12.

[0031] Among them, when the slurry 14 is in the first accommodating chamber 4 and the first accommodating chamber 4, a conical groove 6 is provided on the diverter block 2. The conical groove 6 can make the slurry 14 between the first accommodating chamber 4 and the second accommodating chamber 5 communicate with each other, avoiding excessive pressure in a single accommodating chamber, which may cause leakage of the slurry 14 or uneven coating. Inclined surfaces are provided on both sides of the conical groove 6. When the slurry 14 in the accommodating chamber does not exceed the maximum capacity of the accommodating chamber, it can avoid the absence of slurry 14 in the accommodating chamber during the shaking of the equipment, thereby ensuring continuous and uniform coating of the equipment.

[0032] 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 can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0033] The above content is merely an example and explanation of the structure of the present utility model. Technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the utility model or exceed the scope defined by the claims, they should all fall within the scope of protection of the present utility model.

Claims

1. A coating gasket for preventing leakage, characterized in that: It includes a gasket body, and limit plates are respectively provided on both sides of the gasket body. The limit plates are fixedly connected to the gasket body. Several diverter blocks are provided between the two limit plates. A first accommodating cavity is formed between the limit plates and the diverter blocks, and a second accommodating cavity is formed between every two diverter blocks. A conical groove is provided on each diverter block, and the first accommodating cavity and the second accommodating cavity are connected through the conical groove.

2. A coating gasket for preventing leakage according to claim 1, characterized in that: The thickness of the limiting plate and the diverter block are equal, the two side surfaces of the conical groove are inclined, the distance from the starting point of the conical groove inclined surface to the lower end surface of the diverter block is higher than the distance from the end point of the conical groove inclined surface to the lower end surface of the diverter block, and the slurry in the first accommodating chamber and the second accommodating chamber can flow with each other through the conical groove.

3. The coating gasket for preventing leakage according to claim 1, characterized in that: The length of the tapered groove is 40 mm, the height is 8 mm, and the taper angle of the tapered groove is 60°.

4. The coating gasket for preventing leakage according to claim 1, characterized in that: The gasket body is provided with a mounting hole, which passes through the gasket body and is used for fixing the gasket body to the coating machine.

5. The coating gasket for preventing leakage according to claim 4, characterized in that: There are multiple mounting holes, and the multiple mounting holes are evenly distributed along the length direction of the gasket body.

6. The coating gasket for preventing leakage according to claim 1, characterized in that: Both ends of the gasket body are provided with protrusions, the protrusions are fixedly connected to the gasket body, and the upper and lower end surfaces of the protrusions are flush with the upper and lower end surfaces of the gasket body.

7. The coating gasket for preventing leakage according to claim 1, characterized in that: The gasket body, the diverter block and the limiting plate are an integrated structure.

Images