A slot die coater for battery electrodes

Abstract

The utility model relates to the field of coating machine discloses a slit formula mould coating machine of battery electrode, including U -shaped frame, the U -shaped frame is fixed on the top surface of frame, the inside rotatable of U -shaped frame is provided with conveying roller, the movable setting of coating die head is had at the top of frame, the top surface of coating die head is connected with the fixed conveying pipe, is equipped with conveying pump on the conveying pipe, the inside movable of U -shaped frame is provided with drying box, the inside fixed of heating box has a plurality of electric heating rod. In the utility model, through the cooperation of U -shaped frame, drying box and electric heating rod, the electrode base material can be dried in time after coating, the stability of coating surface is ensured, the adhesion or the falling phenomenon is prevented, thereby the overall uniformity of coating is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of coating machines, specifically a slit-type mold coating machine for battery electrodes. Background Technology

[0002] With technological advancements and increasing demand for mobile devices, the need for batteries as an energy source is rapidly growing. In particular, secondary batteries are attracting significant attention as a power source for power-driven devices such as electric bicycles, electric vehicles, and hybrid vehicles, as well as for mobile devices such as mobile phones, digital cameras, laptops, and wearable devices. A secondary battery comprises an electrode assembly with a structure in which a positive electrode, a negative electrode, and a separator inserted between the positive and negative electrodes are stacked. The secondary battery is manufactured by one method: dispersing active materials, conductive materials, and / or binders in a solvent to prepare a slurry, and then directly coating the slurry onto a current collector to form a battery; or by coating the slurry onto a separate support and then laminating a film layer peeled from the support onto the current collector to form a battery, typically using a slit-die die-casting device.

[0003] According to Chinese Patent No. CN217888498U, a slit-type die coating machine for manufacturing battery electrodes is disclosed. This slit-type die coating machine forms a coating by discharging slurry onto a current collector. The slit-type die coating machine includes: a first mold and a second mold facing each other; a manifold formed on the first mold or the second mold to contain slurry; an unloading section formed by coupling the first mold and the second mold, and the unloading section discharges slurry transferred from the manifold to the outside; and an adjusting section mounted on the first mold. The adjusting section includes a blocking section movable in an axial direction, wherein one surface of the blocking section is arranged parallel to a surface of the first mold, the axial direction of the blocking section forms an angle with the surface of the first mold, and the height of the unloading section is locally adjusted by moving the blocking section.

[0004] In the above scheme, the electrode substrate is coated using the first mold and the second mold, which has the following disadvantages: when the coating machine is in use, the coating substrate cannot be dried in time after coating, which makes the coating surface unstable and prone to adhesion or peeling, thereby reducing the overall uniformity of the coating. Utility Model Content

[0005] The purpose of this invention is to provide a slit-type mold coating machine for battery electrodes, in order to solve the problem that when the electrode substrate is coated, the coating cannot be dried in time, resulting in an unstable coating surface, easy adhesion or peeling, and thus reducing the overall uniformity of the coating.

[0006] To achieve the above-mentioned utility model objectives, the present utility model adopts the following technical solution: a slit-type mold coating machine for battery electrodes, comprising a U-shaped frame, the U-shaped frame being fixed on the top surface of a machine frame, a conveying roller being rotatably arranged inside the U-shaped frame, a coating die being movably arranged above the machine frame, a conveying pipe being fixedly connected to the top surface of the coating die, a conveying pump being provided on the conveying pipe, a drying chamber being movably arranged inside the U-shaped frame, and a plurality of electric heating rods being fixed inside the drying chamber.

[0007] Preferably, the top surface of the drying oven is provided with a connection hole, a hot air blower is fixed on the top surface of the drying oven, a connecting pipe is fixed to the output end of the hot air blower, and the connecting pipe is fixed in the connection hole.

[0008] Preferably, the bottom surface of the drying oven is fixed with two guide plates, which are arranged symmetrically.

[0009] Preferably, the top surface of the U-shaped frame has an movable hole, a first hydraulic push rod is fixed to the top surface of the U-shaped frame, a connecting frame is fixed to one end of the telescopic rod of the first hydraulic push rod, and the bottom surface of the connecting frame is fixedly connected to the top surface of the drying box.

[0010] Preferably, the top surface of the U-shaped frame has two limiting holes, and limiting posts are slidably inserted into the two limiting holes respectively. The bottom ends of the two limiting posts are fixedly connected to the top surface of the connecting frame respectively.

[0011] Preferably, a support plate is fixed on the top surface of the frame, a mounting hole is provided on one side of the support plate, and a second hydraulic push rod is fixed on the rear side of the support plate. One end of the telescopic rod of the second hydraulic push rod is fixedly connected to the rear side of the coating die head.

[0012] Compared with existing technologies, a slit-type mold coating machine for battery electrodes that adopts the above-mentioned technical solution has the following advantages:

[0013] In operation, the operator first installs the frame on the conveyor device, then wraps the electrode substrate on the conveyor device around the conveyor roller, allowing the electrode substrate to pass through the coating area. Subsequently, a conveyor pump pumps the coating material from the conveyor pipe into the coating die, where it is applied to the electrode substrate through a slit. Simultaneously, the operator activates the electric heating rods, which rapidly heat the interior of the drying chamber. The heat is discharged from the bottom of the drying chamber, directly acting on the coating material on the electrode substrate, achieving a highly efficient drying effect. The combined use of the U-shaped frame, drying chamber, and electric heating rods ensures timely drying of the coating material after coating, ensuring a stable coating surface and preventing adhesion or peeling, thereby improving the overall uniformity of the coating.

[0014] II. During use, the operator starts the hot air blower, which sends hot air into the drying chamber through a connecting pipe. The hot air circulates rapidly within the chamber, blowing heat directly onto the coating on the electrode substrate from the bottom, achieving rapid drying and accelerating the drying process. As heat exits from the bottom of the drying chamber, a guide plate directs the heat to better contact with the coating on the electrode substrate, ensuring full utilization of heat and improving drying efficiency. By activating the first hydraulic push rod, the operator can move the connecting frame and the drying chamber up and down, adjusting the distance between the drying chamber and the electrode substrate on the conveyor rollers as needed to ensure optimal drying results.

[0015] Third, during use, the combination of the limiting holes and limiting posts helps to limit the connecting frame, preventing it from shifting off from the drying chamber, thereby improving the stability of the drying chamber during lifting and lowering. By activating the second hydraulic push rod, the operator can adjust the distance between the coating die head and the electrode substrate on the conveying roller, allowing the coating die head to move back and forth as needed to ensure optimal coating results. Attached Figure Description

[0016] Figure 1 This is a three-dimensional schematic diagram of an embodiment.

[0017] Figure 2 This is an exploded diagram of an embodiment.

[0018] Figure 3 This is a cross-sectional view of the drying oven in the embodiment.

[0019] Figure 4 Examples Figure 2 Enlarged diagram of point A in the middle.

[0020] In the diagram: 1. U-shaped frame; 2. Machine frame; 3. Conveying roller; 4. Coating die head; 5. Conveying pipe; 6. Drying oven; 7. Electric heating rod; 8. Connecting hole; 9. Hot air blower; 10. Connecting pipe; 11. Guide plate; 12. Movable hole; 13. First hydraulic push rod; 14. Connecting frame; 15. Limiting hole; 16. Limiting post; 17. Support plate; 18. Mounting hole; 19. Second hydraulic push rod. Detailed Implementation

[0021] The preferred embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0022] like Figures 1-4As shown, a slit-type die coating machine for battery electrodes includes a U-shaped frame 1, which is fixed to the top surface of a frame 2. A conveying roller 3 is rotatably arranged inside the U-shaped frame 1. A coating die 4 is movably arranged above the frame 2. A conveying pipe 5 is connected and fixed to the top surface of the coating die 4. A conveying pump is provided on the conveying pipe 5. A drying box 6 is movably arranged inside the U-shaped frame 1. Several electric heating rods 7 are fixed inside the drying box 6.

[0023] In use, the operator first installs the frame 2 on the conveying device, then wraps the electrode substrate on the conveying device around the conveying roller 3 so that the electrode substrate can pass through the coating area. Then, the coating is pumped from the conveying pipe 5 into the coating die 4 by the conveying pump, and then the coating is applied to the electrode substrate through its slit. At the same time, the operator starts the electric heating rods 7, which quickly heat the inside of the drying chamber 6. The heat is discharged from the bottom of the drying chamber 6 and acts directly on the coating on the electrode substrate to achieve a highly efficient drying effect.

[0024] The combined use of the U-shaped frame 1, drying box 6, and electric heating rod 7 facilitates timely drying of the coating on the electrode substrate after coating, ensuring the stability of the coating surface and preventing adhesion or peeling, thereby improving the overall uniformity of the coating.

[0025] like Figures 1-4 As shown, a connection hole 8 is provided on the top surface of the drying oven 6, and a hot air blower 9 is fixed on the top surface of the drying oven 6. A connecting pipe 10 is fixed to the output end of the hot air blower 9, and the connecting pipe 10 is fixed in the connection hole 8.

[0026] During use, the staff starts the hot air blower 9, which sends hot air into the drying chamber 6 through the connecting pipe 10. The hot air circulates rapidly inside the drying chamber and blows heat out from the bottom of the drying chamber 6, directly onto the coating on the electrode substrate, achieving rapid drying and accelerating the drying process of the coating.

[0027] like Figures 1-4 As shown, two guide plates 11 are fixed on the bottom surface of the drying oven 6. The two guide plates 11 are symmetrically arranged. The top surface of the U-shaped frame 1 has an movable hole 12. The top surface of the U-shaped frame 1 is fixed with a first hydraulic push rod 13. One end of the telescopic rod of the first hydraulic push rod 13 is fixed with a connecting frame 14. The bottom surface of the connecting frame 14 is fixedly connected to the top surface of the drying oven 6.

[0028] During use, when heat is discharged from the bottom of the drying chamber 6, the guide plate 11 can guide the heat to better contact with the coating on the electrode substrate, ensuring that the heat is fully utilized and improving drying efficiency. By activating the first hydraulic push rod 13, the operator can move the connecting frame 14 and the drying chamber 6 up and down, and adjust the distance between the drying chamber 6 and the electrode substrate on the conveyor roller 3 as needed to ensure optimal drying effect.

[0029] like Figures 1-4 As shown, the top surface of the U-shaped frame 1 has two limiting holes 15, and the two limiting holes 15 are respectively slidably inserted with limiting posts 16. The bottom ends of the two limiting posts 16 are respectively fixedly connected to the top surface of the connecting frame 14. The top surface of the frame 2 is fixed with a support plate 17. One side of the support plate 17 has an installation hole 18. The rear side of the support plate 17 is fixed with a second hydraulic push rod 19. One end of the telescopic rod of the second hydraulic push rod 19 is fixedly connected to the rear side of the coating die head 4.

[0030] During use, the limiting hole 15 and the limiting post 16 work together to limit the connecting frame 14, preventing the connecting frame 14 from shifting away from the drying box 6, thereby improving the stability of the drying box 6 when it is raised or lowered. By activating the second hydraulic push rod 19, the operator can adjust the distance between the coating die head 4 and the electrode substrate on the conveying roller 3, so that the coating die head 4 can move back and forth as needed to ensure the best coating effect.

[0031] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A slit-type die coating machine for battery electrodes, comprising a U-shaped frame (1), said U-shaped frame (1) being fixed to the top surface of a frame (2), characterized in that, The U-shaped frame (1) is rotatably equipped with a conveying roller (3), and a coating die (4) is movably mounted above the frame (2). The top surface of the coating die (4) is connected to and fixed with a conveying pipe (5). A conveying pump is mounted on the conveying pipe (5). A drying box (6) is movably mounted inside the U-shaped frame (1), and several electric heating rods (7) are fixed inside the drying box (6).

2. The slit-type mold coating machine for battery electrodes according to claim 1, characterized in that: The top surface of the drying box (6) is provided with a connection hole (8), and a hot air blower (9) is fixed on the top surface of the drying box (6). A connecting pipe (10) is fixed at the output end of the hot air blower (9), and the connecting pipe (10) is fixed in the connection hole (8).

3. The slit-type mold coating machine for battery electrodes according to claim 2, characterized in that: The bottom surface of the drying oven (6) is fixed with two guide plates (11), which are arranged symmetrically.

4. A slit-type mold coating machine for battery electrodes according to claim 3, characterized in that: The top surface of the U-shaped frame (1) is provided with an movable hole (12), and a first hydraulic push rod (13) is fixed on the top surface of the U-shaped frame (1). One end of the telescopic rod of the first hydraulic push rod (13) is fixed with a connecting frame (14), and the bottom surface of the connecting frame (14) is fixedly connected to the top surface of the drying box (6).

5. A slit-type mold coating machine for battery electrodes according to claim 1, characterized in that: The top surface of the U-shaped frame (1) has two limiting holes (15), and the two limiting holes (15) are respectively slidably inserted with limiting posts (16), and the bottom ends of the two limiting posts (16) are respectively fixedly connected to the top surface of the connecting frame (14).

6. A slit-type mold coating machine for battery electrodes according to claim 5, characterized in that: A support plate (17) is fixed on the top surface of the frame (2). An installation hole (18) is provided on one side of the support plate (17). A second hydraulic push rod (19) is fixed on the rear side of the support plate (17). One end of the telescopic rod of the second hydraulic push rod (19) is fixedly connected to the rear side of the coating die head (4).

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