Lithium battery coating linear clothes hanger type die head

Abstract

The utility model relates to the technical field of lithium battery coating, in particular to a lithium battery coating linear clothes hanger type die head which comprises a scraper formed by splicing a first pressing strip and a second pressing strip, a feeding port is formed in the top of the first pressing strip, a groove is formed in the bottom end of the right side of the first pressing strip, and the groove is communicated with the feeding port. A plurality of adjusting devices are arranged on the right side of the second pressing strip from front to back at equal intervals, and the first pressing strip and the second pressing strip are spliced and combined, so that materials firstly enter a groove of the first pressing strip and then are extruded out of the bottom end of the attaching face of the first pressing strip and the second pressing strip through pressure. The bottom end gap of the binding face can be controlled by adjusting the pressure at the bottom ends of the binding face of the first pressing strip and the second pressing strip through the adjusting device, and the purpose of rapidly cleaning the binding face and the groove is achieved.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery coating technology, and in particular to a linear coat hanger type die head for lithium battery coating. Background Technology

[0002] Lithium-ion battery coating dies are key pieces of equipment in the lithium-ion battery production process, primarily used to uniformly coat positive or negative electrode materials onto aluminum or copper foil. This technology is crucial for improving battery energy density, cycle life, and safety. Lithium-ion battery coating die technology mainly includes two methods: slot extrusion coating and transfer coating. Slot extrusion coating is a high-precision, pre-load coating method that achieves high coating accuracy, while transfer coating controls the amount of slurry transferred by adjusting the gap between the coating roller and the doctor blade. In terms of market competition, the early lithium battery equipment market was mainly dominated by companies such as Panasonic and Mitsubishi of Japan, and EDI of the United States. However, with the increasing emphasis on the new energy industry in China, domestic companies such as Mannster and Shangchuan Precision have gradually emerged and achieved technological breakthroughs and increased market share in some areas. This time, we developed a custom die head to meet the special requirements of a certain customer's factory. The reason is that the slurry particles in this factory are relatively large. First, the existing die head has a very close blade spacing, which can easily cause particles to get stuck in the gap between the blades, resulting in scratches on the coating surface and thus scrapping the material. Second, downtime for cleaning wastes time. Third, material is prone to accumulate in the die head cavity, requiring downtime for cleaning every four or five days of coating. Utility Model Content

[0003] The purpose of this invention is to provide a linear coat hanger type die head for lithium battery coating, so as to solve the problems existing in the prior art.

[0004] The above-mentioned technical objective of this utility model is achieved through the following technical solution:

[0005] A linear coater-type die for lithium battery coating includes a scraper composed of a first pressure strip and a second pressure strip. The first pressure strip is located to the left of the second pressure strip, and both the first and second pressure strips are oriented longitudinally. A feed inlet is located at the top center of the first pressure strip. A groove with a longitudinal orientation is located at the bottom right side of the first pressure strip, and the groove communicates with the feed inlet through a channel inside the first pressure strip. A rectangular pressure strip is located inside the groove of the first pressure strip at the bottom left side of the second pressure strip. Multiple adjustment devices are evenly spaced from front to back on the right side of the second pressure strip, and each adjustment device includes a fixing plate. The device comprises a telescopic cylinder, a sealing ring, and an extrusion block. The fixed plate is fixedly connected to the second pressure strip. The telescopic cylinder is fixedly mounted on the fixed plate. The bottom end of the second pressure strip has multiple through holes from front to back, and the axis of the through holes is in the left-right direction. The sealing ring is coaxially disposed in the through holes. The push rod of the telescopic cylinder passes through the sealing ring and extends into the through holes. The bottom left side of the second pressure strip has an extrusion groove with the right side length in the front-back direction. The extrusion block is movably disposed inside the extrusion groove, and the push rod of the telescopic cylinder is fixedly connected to the right side of the extrusion block. The telescopic cylinder is used to drive the extrusion block to move left and right, and the end faces of two adjacent extrusion blocks are in contact with each other.

[0006] By adopting the above technical solution, the problem of splicing and combining the first and second pressure strips during the customer's coating process is solved. The material first enters the groove of the first pressure strip and is then squeezed out from the bottom of the mating surface of the first and second pressure strips by pressure. The gap at the bottom of the mating surface can be controlled by adjusting the pressure at the bottom of the mating surface of the first and second pressure strips by adjusting the device, thereby controlling the coating amount. When the gap increases to its maximum value, solvent and cleaning agent can be injected into the groove of the first pressure strip through the feed port to quickly clean the mating surface and the groove.

[0007] In a further embodiment, the top of the scraper is symmetrically provided with flattening blocks at the front and rear, and the top of the scraper is symmetrically provided with hinges at the front and rear, the hinges being used to hinge and fix the first pressure strip and the second pressure strip.

[0008] In a further embodiment, the groove cross-section of the first pressure strip is arc-shaped.

[0009] In a further embodiment, the flattening block has through holes at both its left and right ends, and the top of the first pressure strip / second pressure strip has threaded holes corresponding to the through holes.

[0010] In a further embodiment, a downward-facing first scraping portion is provided on the bottom right side of the first pressure strip, and a second scraping portion corresponding to the first scraping portion is provided on the bottom left side of the second pressure strip.

[0011] In a further embodiment, the first scraping portion is integrally formed with the first pressure strip, and the second scraping portion is integrally formed with the second pressure strip.

[0012] In summary, this utility model has the following beneficial effects:

[0013] 1. By splicing and combining the first and second pressure strips, the material first enters the groove of the first pressure strip, and then is squeezed out from the bottom end of the bonding surface of the first and second pressure strips by pressure. The gap at the bottom end of the bonding surface can be controlled by adjusting the pressure at the bottom end of the first and second pressure strips by adjusting the adjustment device, so as to control the coating amount. When the gap increases to the maximum value, solvent and cleaning agent can be injected into the groove of the first pressure strip through the feed port to quickly clean the bonding surface and the groove. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a cross-sectional structural diagram of the scraper of this utility model.

[0016] In the diagram, 1 is the first pressure bar; 2 is the second pressure bar; 3 is the feed inlet; 4 is the adjusting device; 41 is the fixing plate; 42 is the telescopic cylinder; 43 is the sealing ring; 44 is the extrusion block; 5 is the flattening block; and 6 is the hinge. Detailed Implementation

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

[0018] Identical parts are indicated by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "upper," and "lower" used in the following description refer to the attached figures. Figure 1 In this specification, the terms "bottom surface" and "top surface," "inner" and "outer" refer to the direction toward or away from the geometry of a specific component. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this specification, "a plurality of" means two or more, unless otherwise explicitly and specifically defined by the direction of the center.

[0019] Example 1:

[0020] like Figures 1-2As shown, a linear coat hanger type die head for lithium battery coating includes a scraper composed of a first pressure strip 1 and a second pressure strip 2. The first pressure strip 1 is located to the left of the second pressure strip 2, and the length direction of both the first pressure strip 1 and the second pressure strip 2 is in the front-back direction. A downward-facing first scraping part is provided on the bottom right side of the first pressure strip 1, and a second scraping part corresponding to the first scraping part is provided on the bottom left side of the second pressure strip 2. The first scraping part is integrally formed with the first pressure strip 1, and the second scraping part is integrally formed with the second pressure strip 2. A feed inlet 3 is provided at the top center of the first pressure strip 1. Flattening blocks 5 are symmetrically arranged at the front and rear of the top of the scraper, and hinges 6 are symmetrically arranged at the front and rear of the top of the scraper. The hinges 6 are used to hinge and fix the first pressure strip 1 and the second pressure strip 2. Through holes are provided at both the left and right ends of the flattening blocks 5. Threaded holes corresponding to the through holes are provided at the top of both the first pressure strip 1 and the second pressure strip 2. A groove with the length direction in the front-back direction is provided at the bottom right side of the first pressure strip 1. The groove passes through the interior of the first pressure strip 1. The channel is connected to the feed inlet 3. A rectangular pressure strip is provided at the bottom left side of the second pressure strip 2, located inside the groove of the first pressure strip 1. Multiple adjustment devices 4 are provided at equal intervals from front to back on the right side of the second pressure strip 2. The adjustment device 4 includes a fixing plate 41, a telescopic cylinder 42, a sealing ring 43, and a pressing block 44. The fixing plate 41 is fixedly connected to the second pressure strip 2, and the telescopic cylinder 42 is fixedly installed on the fixing plate 41. Multiple through holes are provided at the bottom of the second pressure strip 2 from front to back, and the axis of the through holes is to the left. To the right, the sealing ring 43 is coaxially set in the through hole. The push rod of the telescopic cylinder 42 passes through the sealing ring 43 and extends into the through hole. The bottom left side of the second pressure strip 2 is provided with an extrusion groove with the right length direction in the front-back direction. The extrusion block 44 is movably set inside the extrusion groove, and the push rod of the telescopic cylinder 42 is fixedly connected to the right side of the extrusion block 44. The telescopic cylinder 42 is used to drive the extrusion block 44 to move left and right. The end faces of two adjacent extrusion blocks 44 fit together. The cross-section of the groove of the first pressure strip 1 is arc-shaped.

[0021] Specific implementation process: The telescopic cylinder 41 of the adjusting device 4 can drive the extrusion block to move left and right. During the process of the extrusion block moving to the left, the left end face of the extrusion block presses the right end face of the first pressure strip. Since the tops of the first and second pressure strips are hinged, this movement will cause the tops of the first and second pressure strips to fit more tightly, and at the same time, it will cause the bottom gap of the first and second pressure strips to be larger, thereby achieving the purpose of controlling the coating amount. When the gap increases, the particles inside the groove can pass through. At this time, solvents and cleaning agents that can dissolve the coating are injected into the inside of the groove through the feed port, which can quickly clean the particles inside the groove. The flattening block mainly restricts the opening and closing of the first and second pressure strips. In actual use, the threaded holes at the top of the first and second pressure strips can be slightly tilted so that the bottoms of the threaded holes are close to each other. In this way, the special shim design can make the flattening block have better resistance to opening and closing forces.

[0022] In the embodiments disclosed in this utility model, the terms "installation," "connection," "linking," and "fixing" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "linking" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments disclosed in this utility model according to the specific circumstances.

[0023] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

Claims

1. A linear coat hanger-type die head for lithium battery coating, characterized in that: The scraper comprises a first pressure strip (1) and a second pressure strip (2). The first pressure strip (1) is located to the left of the second pressure strip (2), and the length directions of both the first pressure strip (1) and the second pressure strip (2) are in the front-to-back direction. A feed inlet (3) is provided at the top center of the first pressure strip (1). A groove with a front-to-back direction is provided at the bottom right side of the first pressure strip (1). The groove is connected to the feed inlet (3) through a channel provided inside the first pressure strip (1). A rectangular pressure strip located inside the groove of the first pressure strip (1) is provided at the bottom left side of the second pressure strip (2). Multiple adjustment devices (4) are provided at equal intervals from front to back on the right side of the second pressure strip (2). The adjustment device (4) includes a fixing plate (41), a telescopic cylinder (42), and a sealing ring (43). The second pressure strip (2) is fixedly connected to the fixed plate (41) and the extrusion block (44). The telescopic cylinder (42) is fixedly installed on the fixed plate (41). The bottom end of the second pressure strip (2) is provided with multiple through holes from front to back, and the axis of the through holes is in the left-right direction. The sealing ring (43) is coaxially arranged in the through hole. The top rod of the telescopic cylinder (42) passes through the sealing ring (43) and extends into the through hole. The bottom left side of the second pressure strip (2) is provided with an extrusion groove in the right-side length direction in the front-back direction. The extrusion block (44) is movably arranged inside the extrusion groove. The top rod of the telescopic cylinder (42) is fixedly connected to the right side of the extrusion block (44). The telescopic cylinder (42) is used to drive the extrusion block (44) to move left and right. The end faces of the extrusion blocks (44) adjacent to each other are in contact with each other.

2. The linear coat hanger type die head for lithium battery coating according to claim 1, characterized in that: The top of the scraper is symmetrically provided with flattening blocks (5) at the front and back, and the top of the scraper is symmetrically provided with hinges (6) at the front and back. The hinges (6) are used to hinge and fix the first pressure strip (1) and the second pressure strip (2).

3. The linear coat hanger type die head for lithium battery coating according to claim 1, characterized in that: The groove cross-section of the first pressure strip (1) is arc-shaped.

4. A linear coat hanger-type die for lithium battery coating according to claim 2, characterized in that: The flattening block (5) has through holes at both its left and right ends, and the top of the first pressure strip (1) and the second pressure strip (2) is provided with threaded holes corresponding to the through holes.

5. A linear coat hanger-type die for lithium battery coating according to claim 1, characterized in that: The bottom right side of the first pressure strip (1) is provided with a downward-facing first scraping part, and the bottom left side of the second pressure strip (2) is provided with a second scraping part corresponding to the first scraping part.

6. A linear coat hanger-type die for lithium battery coating according to claim 5, characterized in that: The first scraping part is integrally formed with the first pressure strip (1), and the second scraping part is integrally formed with the second pressure strip (2).

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