Inflation-adjustable turbulent flow structure for lithium battery coating die head cavity

Abstract

The utility model relates to the field of lithium battery coating die heads, and particularly discloses an inflatable adjustable turbulent flow structure for a lithium battery coating die head cavity, an inlet is formed in one side of the cavity wall of the cavity, an outlet is formed in the other side of the cavity wall of the cavity, the turbulent flow structure is located in the middle of the cavity, the turbulent flow structure has elasticity, and the cavity wall of the cavity is provided with an air inlet. And an arc-shaped turbulent flow surface can be formed at the inlet in the cavity after being inflated and expanded. According to the structure, the surface density uniformity of the pole piece coated by the coating die head can be well improved, and corresponding outlet speed uniform adjustment can be realized according to different slurry flows.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery coating die heads, specifically an adjustable air-filled turbulence structure for the cavity of a lithium battery coating die head. Background Technology

[0002] The core of coating technology lies in the coating quality of the positive and negative electrodes, which directly affects the battery's performance. However, traditional coating equipment has low uniformity in coating density, making it crucial to ensure uniform electrode coating, which has a significant impact on lithium-ion battery performance.

[0003] This invention provides an adjustable airflow turbulence structure for the cavity of a lithium battery coating die, which can effectively improve the uniformity of electrode surface density in the coating die and can be adjusted according to different slurry flow rates. It has great reference value for the improvement of battery coating process. Utility Model Content

[0004] The purpose of this invention is to provide an adjustable air-filled turbulence structure for the cavity of a lithium battery coating die, which can effectively improve the uniformity of electrode surface density coated by the coating die and can achieve uniform adjustment of the outlet speed for different slurry flow rates.

[0005] The objective of this utility model can be achieved through the following technical solutions:

[0006] An adjustable airflow disturbance structure for a lithium battery coating die cavity is provided. The cavity wall has an inlet on one side and an outlet on the other side. The disturbance structure is located in the middle of the cavity. The disturbance structure is elastic and can form an arc-shaped disturbance surface at the inlet of the cavity after being inflated.

[0007] In a further embodiment, the turbulence structure is ellipsoidal, with its ends supported on the cavity wall, and an air inlet is provided at one end.

[0008] In a further embodiment, the size of the ellipsoid can be changed by introducing gas into the turbulence structure through the air inlet.

[0009] In a further embodiment, the ellipsoidal perturbation structure is symmetrical about the central axis of the cavity.

[0010] In a further embodiment, the turbulence structure is made by vulcanizing rubber with a fiber reinforcement layer.

[0011] In a further embodiment, the outlet is a long, narrow opening and is located on the cavity wall.

[0012] In a further embodiment, the mold head includes an upper mold, a lower mold, and a pad. The cavity is disposed inside the lower mold. The upper and lower surfaces of the pad are respectively sealed to the lower surface of the upper mold and the upper surface of the lower mold. The pad is concave, and the concave notch communicates with the cavity and forms the outlet.

[0013] In a further embodiment, the inlet is cylindrical and is used to connect to the tubing.

[0014] In a further embodiment, the inlet is located in the middle of the cavity wall.

[0015] In a further embodiment, the cavity is semi-cylindrical.

[0016] The beneficial effects of this utility model are:

[0017] This invention uses an inflatable turbulence structure to adjust the impact speed of the slurry at the mold head inlet and adjust the size of the entire mold cavity, thereby controlling the flow rate at the mold cavity outlet and improving the uniformity of the coating density of the electrode sheets at the outlet. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of a variable airflow structure for a lithium battery coating die cavity after being fully inflated, according to an embodiment of the present invention.

[0020] Figure 2 This is a schematic diagram of a variable airflow structure for a lithium battery coating die cavity after a small amount of air is inflated, according to an embodiment of the present invention.

[0021] Figure 3 This is a schematic diagram of a coating die for lithium batteries in an embodiment of the present invention;

[0022] Figure 4 yes Figure 3 Enlarged view of point A in the middle;

[0023] Figure 5 This is a schematic diagram of the connection of a lithium battery coating die cavity in an embodiment of the present invention;

[0024] In the diagram: 1. Cavity; 10. Cavity wall; 100. Inlet; 2. Inlet; 3. Outlet; 4. Turbulence structure; 5. Upper mold; 6. Lower mold; 7. Pad. Detailed Implementation

[0025] 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 scope of protection of the present utility model.

[0026] like Figure 5 As shown, an adjustable airflow turbulence structure for a lithium battery coating die cavity is provided. The cavity wall 10 of the die cavity 1 has an inlet 2 on one side and an outlet 3 on the other side. The turbulence structure 4 is located in the middle of the cavity 1. The turbulence structure 4 is elastic and can form an arc-shaped turbulence surface at the inlet 2 inside the cavity 1 after being inflated.

[0027] See Figure 1 and Figure 2 As shown, the adjustable airflow structure 4 can be adjusted in size according to the air volume, thereby adjusting the size of the cavity 1. Different inlet velocities match different slurry outlet 3 velocities, exhibiting high adaptability. The airflow surface can slow down the straight inflow and outflow of the slurry, solving the problem of high density near the inlet 2 during discharge. It can adjust the stability and uniformity of the fluid during lithium battery coating. Specific advantages include the following:

[0028] Structural features: The adjustable inflatable turbulence structure 4 is located in the middle of the die cavity 1. It is elastic and can form an arc-shaped turbulence surface at the inlet 2 inside the cavity 1 after inflation. This helps to form a stable flow field during the coating process, improving the uniformity and consistency of the coating.

[0029] Adjustability: The flexible design of the turbulence structure 4 allows its shape and size to be adjusted according to actual needs. By inflating or deflating, the shape and size of the turbulence surface can be changed to adapt to different coating conditions and achieve precise fluid control.

[0030] Application advantages: Compared with the traditional fixed turbulence structure 4, the inflatable adjustable turbulence structure 4 has greater flexibility and adjustability. It can adapt to different fluid characteristics, different coating speeds and conditions, thereby improving coating efficiency and quality.

[0031] Simple structure and easy maintenance: Since the four inflatable adjustable turbulence structures are made of elastic materials, the structure is simple, easy to maintain and low in cost.

[0032] The turbulence structure 4 is ellipsoidal in shape, with one end supported on the cavity wall 10 and an air inlet 100 at one end. Gas can be introduced into the turbulence structure 4 through the air inlet 100 to change the size of the ellipsoid. The ellipsoidal turbulence structure 4 is symmetrical about the central axis of the cavity 1. The turbulence structure 4 is made by vulcanizing rubber and fiber reinforcement layers. The turbulence structure 4 is similar to an expandable and contractible ellipsoidal bag, made of rubber and fiber reinforcement layers, possessing high tensile strength, elasticity, and airtightness. Different amounts of gas can be introduced through the air inlet 100 to change the size of the ellipsoid, altering the minor axis radius of the ellipsoid to expand or shrink the cavity 1 of the die head, achieving different flow paths for the slurry within the die head, thus meeting the requirement of uniform slurry velocity at the die head outlet 3. By adjusting the amount of gas introduced, the size of the ellipsoidal turbulence structure 4 can be changed, thereby achieving uniform slurry velocity at the die head outlet 3 under different slurry flow rates. The turbulence structure 4 can also be easily replaceable, such as being connected to the mold head at the end via a threaded connector, and its shape is not limited to an ellipsoid. It can be replaced with hyperbolic, cylindrical or other shapes depending on the inlet position of the cavity 1 or the internal pressure distribution.

[0033] like Figure 3 As shown, outlet 3 is an elongated opening located on the cavity wall 10, and can be symmetrical about the central axis of the cavity wall 10. This increases the coating area.

[0034] The die head includes an upper die 5, a lower die 6, and a backing plate 7. (See attached image.) Figure 5 As shown, cavity 1 is set inside lower mold 6, and the upper and lower surfaces of pad 7 are respectively sealed to the lower surface of upper mold 5 and the upper surface of lower mold 6. Pad 7 is concave, as shown. Figure 4 The concave notch 70 shown communicates with the cavity 1 and forms the outlet 3. This facilitates the formation and fabrication of the cavity.

[0035] like Figure 1 As shown, inlet 2 is cylindrical and is used to connect to the tubing string. The tubing string can be used to connect to the inlet pipeline.

[0036] Inlet 2 is located in the middle of the cavity wall 10 of cavity 1. Conventionally, inlet 2 is connected to the cavity wall 10 through a pipe. However, this method can easily result in a high surface density of the coating in the middle. In this application, the turbulence structure 4 can be changed by altering the air volume, so that the slurry at outlet 3 is not concentrated, has good uniformity, and the discharge speed is adjustable, thereby achieving a reasonable and uniform surface density of the coated electrode plate.

[0037] Cavity 1 is semi-cylindrical. This reduces the resistance to liquid discharge.

[0038] It should be noted that the terms "first," "second," etc., used in this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this application described herein.

[0039] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0040] 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 claimed utility model.

Claims

1. An adjustable airflow structure for a coating die cavity of a lithium battery, wherein an inlet (2) is provided on one side of the cavity wall (10) and an outlet (3) is provided on the other side, characterized in that, The turbulence structure (4) is located in the middle of the cavity (1). The turbulence structure (4) is elastic and can be inflated to form an arc-shaped turbulence surface at the inlet (2) of the cavity (1).

2. The adjustable airflow turbulence structure for a lithium battery coating die cavity according to claim 1, characterized in that, The turbulence structure (4) is ellipsoidal, with its end supported on the cavity wall (10), and an air inlet (100) is provided at one end.

3. The adjustable airflow turbulence structure for a lithium battery coating die cavity according to claim 2, characterized in that, The size of the ellipsoid can be changed by filling the gas through the air inlet (100) into the turbulence structure (4).

4. The adjustable airflow turbulence structure for a lithium battery coating die cavity according to claim 2, characterized in that, The ellipsoidal turbulence structure (4) is symmetrical about the central axis of the cavity (1).

5. The adjustable airflow turbulence structure for a lithium battery coating die cavity according to claim 1, characterized in that, The turbulence structure (4) is made by vulcanizing rubber and fiber reinforcement layers.

6. The adjustable airflow turbulence structure for a lithium battery coating die cavity according to claim 1, characterized in that, The outlet (3) is a long opening and is located on the cavity wall (10).

7. The adjustable airflow turbulence structure for a lithium battery coating die cavity according to claim 1, characterized in that, The mold head includes an upper mold (5), a lower mold (6) and a pad (7). The cavity (1) is disposed inside the lower mold (6). The upper and lower surfaces of the pad (7) are respectively sealed to the lower surface of the upper mold (5) and the upper surface of the lower mold (6). The pad (7) is concave, and the concave notch (70) communicates with the cavity (1) and forms the outlet (3).

8. The adjustable airflow structure for a lithium battery coating die cavity according to claim 1, characterized in that, The inlet (2) is cylindrical and is used to connect to the tubing.

9. The adjustable airflow turbulence structure for a lithium battery coating die cavity according to claim 1, characterized in that, The inlet (2) is located in the middle of the cavity wall (10) of the cavity (1).

10. The adjustable airflow turbulence structure for a lithium battery coating die cavity according to claim 1, characterized in that, The cavity (1) is semi-cylindrical.

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