Numerical control coating die for composite lithium battery diaphragm production

Abstract

The utility model discloses a compound lithium battery diaphragm production is with numerical control coating die, including coating mould box, the inside of coating mould box is provided with accommodating cavity, and the top of accommodating cavity is provided with extrusion mechanism, extrusion mechanism installs at the top of coating mould box, the bottom both sides position of coating mould box is fixed with first slit seat and second slit seat respectively, and is fixedly connected through sealing gasket between first slit seat and second slit seat, compared with prior art, the utility model discloses a replaceable sealing gasket, the width of coating slit is adjusted, adapts the demand of different coating thickness, has improved the applicability of equipment, adopts the extrusion mechanism of electric cylinder drive, can accurate control coating size's extrusion pressure and speed, ensures coating even, promotes diaphragm quality, and the cooperation design of injection pipe and plugging cap is convenient for supplementing coating size in the coating process, realizes continuous production, improves the efficiency.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery separator production technology, specifically to a CNC coating die head for composite lithium battery separator production. Background Technology

[0002] In the production of lithium-ion battery separators, solid electrolyte composite separators have gained attention due to their excellent electrochemical performance and safety. Currently, one of the key steps in preparing such separators is to uniformly coat a solid electrolyte coating onto the base membrane. The uniformity of the coating directly affects the performance of the separator and the stability of the battery.

[0003] Therefore, to solve the problem of uneven coating, the main measures adopted include manual coating or fixed slit coating equipment. Although these methods improve the uniformity of coating to some extent, they still have some problems and shortcomings. First, manual coating is inefficient, and the coating quality is greatly affected by human factors, making it difficult to meet the needs of large-scale production. Second, fixed slit coating equipment cannot effectively adjust the slit size and cannot adapt to the needs of coating different thicknesses. Therefore, this utility model proposes a CNC coating die head for composite lithium battery separator production. Utility Model Content

[0004] The purpose of this invention is to provide a CNC coating die head for the production of composite lithium battery separators, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a CNC coating die head for composite lithium battery separator production, comprising a coating die box, wherein the coating die box has an internal receiving cavity, and an extrusion mechanism is provided at the top of the receiving cavity. The extrusion mechanism is installed on the top of the coating die box, and a first slit seat and a second slit seat are fixedly installed on both sides of the bottom of the coating die box, and the first slit seat and the second slit seat are fixedly connected by a sealing gasket, and a coating slit is provided inside the sealing gasket, the coating slit being connected to the receiving cavity.

[0006] As a preferred technical solution of this utility model, the extrusion mechanism includes a piston head that is slidably mounted on the inner surface of the receiving cavity, an electric cylinder that is fixedly mounted on the top of the coating mold box, a piston rod that is provided at the bottom of the electric cylinder, and the lower end of the piston rod that is fixedly connected to the piston head.

[0007] As a preferred technical solution of this utility model, the first slit seat and the second slit seat are both fixedly connected to the side away from each other, and the bottom of the coating mold box is provided with an installation groove, and the two installation guide plates are slidably installed on the installation groove.

[0008] As a preferred technical solution of this utility model, the first slit seat and / or the second slit seat are provided with an injection pipe that communicates with the receiving cavity.

[0009] In a preferred embodiment of this invention, the sealing gasket is a metal plate.

[0010] As a preferred technical solution of this utility model, a sealing cap is provided below the coating slit.

[0011] As a preferred technical solution of this utility model, the first slit seat and the second slit seat are respectively provided with a first mounting plate and a second mounting plate on the side near the sealing gasket. The first mounting plate and the second mounting plate are fixedly connected by bolts, and the sealing gasket is provided with a through hole corresponding to the bolt, and the bolt passes through the sealing gasket.

[0012] Compared with the prior art, the beneficial effects of this utility model are: This invention relates to a CNC coating die head for composite lithium battery separator production. By incorporating a replaceable sealing gasket, the width of the coating slit can be easily adjusted to accommodate different coating thicknesses, thus improving the equipment's applicability. The electric cylinder-driven extrusion mechanism precisely controls the extrusion pressure and speed of the coating slurry, ensuring uniform coating and improving separator quality. The coordinated design of the injection pipe and sealing cap facilitates the replenishment of coating slurry during the coating process, enabling continuous production and increasing efficiency. The structure of the mounting guide plate and mounting groove facilitates the disassembly and positioning of the slit seat, enhancing the overall structural stability and ease of maintenance.

[0013] Other features and advantages of this invention will be described in detail in the following specific embodiments. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the internal structure of the present invention; Figure 2 This is a front view structural diagram of the present utility model; Figure 3 This is a schematic diagram of the structure of this utility model from a bottom view.

[0015] In the diagram: 1. Coating mold box; 2. Receiving cavity; 3. Extrusion mechanism; 31. Piston head; 32. Electric cylinder; 33. Piston rod; 4. First slit seat; 5. Second slit seat; 6. Coating slit; 7. Mounting guide plate; 70. Mounting groove; 8. Sealing gasket; 9. Injection pipe; 10. Sealing cap; 11. First mounting plate; 12. Second mounting plate; 13. Bolt; 14. L-shaped fixing plate; 15. Threaded pressure rod. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] In the description of this utility model, it should be noted that the terms "vertical", "up", "down", "horizontal", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0018] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0019] Please see Figures 1-3 In this embodiment, a CNC coating die head for composite lithium battery separator production is provided, including a coating die box 1. The coating die box 1 has an internal cavity 2, and an extrusion mechanism 3 is provided on the top of the cavity 2. The extrusion mechanism 3 is installed on the top of the coating die box 1. A first slit seat 4 and a second slit seat 5 are fixedly installed on both sides of the bottom of the coating die box 1, and the first slit seat 4 and the second slit seat 5 are fixedly connected by a sealing gasket 8. A coating slit 6 is provided inside the sealing gasket 8, and the coating slit 6 is connected to the cavity 2. A material inlet pipe 9 connected to the cavity 2 is provided on the first slit seat 4 and / or the second slit seat 5. A first mounting piece 11 and a second mounting piece 12 are provided on the side of the first slit seat 4 and the second slit seat 5 near the sealing gasket 8, respectively. The first mounting piece 11 and the second mounting piece 12 are fixedly connected by a bolt 13, and a through hole corresponding to the bolt 13 is provided on the sealing gasket 8, through which the bolt 13 passes.

[0020] In this embodiment, the extrusion mechanism 3 includes a piston head 31 slidably mounted on the inner surface of the receiving cavity 2. An electric cylinder 32 is fixedly mounted on the top of the coating mold box 1. A piston rod 33 is provided at the bottom of the electric cylinder 32. The lower end of the piston rod 33 is fixedly connected to the piston head 31. By starting the electric cylinder 32 to drive the piston head 31 to move downward, the coating slurry in the receiving cavity 2 below the piston head 31 can be extruded downward and finally extruded through the coating slit 6. The base film of the lithium battery separator is moved at a constant speed by the conveyor belt below the coating slit 6, and the solid electrolyte material is extruded through the coating slit 6 and uniformly coated on the base film of the lithium battery separator. By controlling the extrusion pressure (the extension and retraction speed of the piston rod 33 of the electric cylinder 32) and the moving speed of the base film, the uniformity of the coating thickness is ensured. Specifically, the electric cylinder 32 is electrically connected to the DCS control system. The motor of the conveyor used to transport the lithium battery separator base film is a servo motor, which is also electrically connected to the DCS control system. The DCS control system can preset the output rate and speed of the electric cylinder 32 and the servo motor in advance, so that the DCS numerical control can be used to coordinate the extrusion of the coating slurry and the dynamic coordination of the conveying of the lithium battery separator base film below.

[0021] In this embodiment, the sealing gasket 8 is a metal plate. By setting the sealing gasket 8, not only can the first slit seat 4 and the second slit seat 5 be fixedly installed, but the first slit seat 4, the second slit seat 5 and the sealing gasket 8 can also form a limiting structure that only has the lower position of the coating slit 6. By replacing the sealing gasket 8 with different thicknesses, the width of the coating slit 6 can be adjusted to meet the needs of different coating thicknesses.

[0022] In this embodiment, a sealing cap 10 is provided below the coating slit 6. With the sealing cap 10, when the coating slurry in the receiving cavity 2 is almost used up, the coating slit 6 can be blocked by the sealing cap 10, and then the coating slurry can be injected into the receiving cavity 2 through the injection pipe 9 using a high-pressure device. At the same time, the piston head 31 is driven by the electric cylinder 32 to rise at a uniform speed, so that the receiving cavity 2 can be filled with coating slurry again, which facilitates the subsequent continuous coating work.

[0023] In this embodiment, mounting guide plates 7 are fixedly connected to the sides of the first slit seat 4 and the second slit seat 5 that are far apart from each other. The bottom of the coating mold box 1 is provided with a mounting groove 70. Both mounting guide plates 7 are slidably mounted on the mounting groove 70. Through the mounting guide plates 7, the first slit seat 4 and the second slit seat 5 can be well installed at the bottom of the coating mold box 1. In addition, to improve the stability of the first slit seat 4 and the second slit seat 5, an L-shaped fixing piece 14 is also fixedly installed at the bottom of the coating mold box 1, and a threaded pressure rod 15 is screwed onto the L-shaped fixing piece 14. After the first slit seat 4 and the second slit seat 5 are installed with the sealing gasket 8 of appropriate thickness, by screwing the threaded pressure rod 15, the threaded pressure rod 15 can be made to push the first slit seat 4 and the second slit seat 5 upward, thereby improving the stability of the first slit seat 4 and the second slit seat 5 after installation.

[0024] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A CNC coating die head for producing composite lithium battery separators, characterized in that, The coating includes a coating mold (1), which has an internal cavity (2) and an extrusion mechanism (3) on the top of the cavity (2). The extrusion mechanism (3) is installed on the top of the coating mold (1). A first slit seat (4) and a second slit seat (5) are fixedly installed on both sides of the bottom of the coating mold (1). The first slit seat (4) and the second slit seat (5) are fixedly connected by a sealing gasket (8). A coating slit (6) is provided inside the sealing gasket (8). The coating slit (6) is connected to the cavity (2).

2. The CNC coating die head for producing composite lithium battery separators according to claim 1, characterized in that, The extrusion mechanism (3) includes a piston head (31) that is slidably mounted on the inner surface of the receiving cavity (2). An electric cylinder (32) is fixedly mounted on the top of the coating mold box (1). A piston rod (33) is provided at the bottom of the electric cylinder (32). The lower end of the piston rod (33) is fixedly connected to the piston head (31).

3. The CNC coating die head for producing composite lithium battery separators according to claim 1, characterized in that, The first slit seat (4) and the second slit seat (5) are fixedly connected to the side away from each other by an installation guide plate (7). The bottom of the coating mold box (1) is provided with an installation groove (70). Both installation guide plates (7) are slidably installed on the installation groove (70).

4. The CNC coating die head for producing composite lithium battery separators according to claim 1, characterized in that, The first slit seat (4) or / and the second slit seat (5) are provided with an injection pipe (9) that communicates with the receiving cavity (2).

5. The CNC coating die head for producing composite lithium battery separators according to claim 1, characterized in that, The sealing gasket (8) is a metal plate.

6. The CNC coating die head for producing composite lithium battery separators according to claim 1, characterized in that, A sealing cap (10) is provided below the coating slit (6).

7. The CNC coating die head for producing composite lithium battery separators according to claim 1, characterized in that, The first slit seat (4) and the second slit seat (5) are respectively provided with a first mounting plate (11) and a second mounting plate (12) on the side near the sealing gasket (8). The first mounting plate (11) and the second mounting plate (12) are fixedly connected by bolts (13), and the sealing gasket (8) is provided with a through hole corresponding to the bolt (13), and the bolt (13) passes through the sealing gasket (8).

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