Lithium battery coating die head

Abstract

The utility model relates to the technical field of lithium battery coating, in particular to a lithium battery coating die head which comprises a die head body, the die head body is provided with a material injection port and a material discharge port, a material injection cavity is arranged in the die head body, the material injection port and the material discharge port are both communicated with the material injection cavity, and the material discharge port is communicated with the material injection cavity. The slurry in the material injection cavity is discharged through the material outlet; and the vibration module is arranged in the material injection cavity, and the vibration module continuously provides a vibration effect on the slurry in the material injection cavity. The application has the effects of improving the coating uniformity and increasing the flowability of the slurry.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery coating, in particular to a lithium battery coating die head. Background Art

[0002] The coating process is one of the key processes in the production of lithium battery electrodes. The quality of the coating largely determines important parameters such as the capacitance and voltage of the lithium battery. Among them, the uniformity of the coating thickness of the slurry is an important manifestation of the coating quality.

[0003] In the prior art, the slurry is transported to the coating die head through a pipeline under the action of a pump body to complete the discharging. Due to the high-viscosity characteristic of the slurry, the bubbles in the slurry are difficult to escape due to its viscosity, so bubbles will be formed in the coating layer during the coating process, affecting the coating uniformity. And because the size of the discharging port of the coating die head is usually small, the coating slurry will accumulate and pile up inside the coating die head, affecting its normal flow, and also affecting the coating uniformity and stability, which urgently needs to be solved. Summary of the Utility Model

[0004] Aiming at the above deficiencies in the prior art, the present application provides a lithium battery coating die head.

[0005] The above-mentioned invention purpose of the present application is achieved through the following technical solutions:

[0006] A die head body, the die head body is provided with a feeding port and a discharging port, a feeding cavity is arranged inside the die head body, both the feeding port and the discharging port are communicated with the feeding cavity, and the slurry in the feeding cavity is discharged through the discharging port;

[0007] A vibration module, the vibration module is arranged in the feeding cavity, and the vibration module continuously provides a vibration effect on the slurry in the feeding cavity.

[0008] By adopting the above technical solutions, under the action of the vibration module, after the slurry enters the feeding cavity, it can continuously receive the vibration effect. The bubbles in the slurry merge and burst under the vibration effect, or rise to the surface and are released, so as to reduce the number of bubbles, improve the coating uniformity. At the same time, it can reduce the adhesion of the slurry in the feeding cavity to increase the fluidity of the slurry, so that the slurry is not easy to accumulate and pile up inside the feeding cavity, improve the coating stability and save coating materials. Meanwhile, the slurry in the feeding cavity can be evenly extruded from the discharging port under the vibration and extrusion of the vibration module to complete the coating process.

[0009] In a preferred embodiment, the present application can be further configured as follows: The vibration module includes a control system and a piezoelectric ceramic sheet. Electrodes are disposed on both the upper and lower surfaces of the piezoelectric ceramic sheet. The electrodes are electrically connected to the piezoelectric ceramic sheet and are controllably connected to the control system.

[0010] By adopting the above technical solution, according to the piezoelectric effect principle of the piezoelectric ceramic sheet, an electric field is applied to the piezoelectric ceramic sheet through the electrodes, so that the piezoelectric ceramic sheet can generate deformation. Moreover, the voltage and polarity of the electrodes are controlled by the control system to control the direction and intensity of the electric field, thereby controlling the deformation direction and frequency of the piezoelectric ceramic sheet to achieve the vibration function.

[0011] In a preferred embodiment, the present application can be further configured as follows: The piezoelectric ceramic sheet is a lead zirconate titanate piezoelectric ceramic sheet.

[0012] By adopting the above technical solution, the piezoelectric ceramic sheet made of lead zirconate titanate series materials has good stability, can maintain a stable vibration frequency, so that the slurry can receive a stable vibration extrusion effect, thereby improving the coating uniformity and being suitable for the coating working condition.

[0013] In a preferred embodiment, the present application can be further configured as follows: A support substrate is fixedly connected inside the material injection cavity, and the support substrate is used to support the piezoelectric ceramic sheet.

[0014] By adopting the above technical solution, setting the support substrate can provide support and an installation position for the piezoelectric ceramic sheet.

[0015] In a preferred embodiment, the present application can be further configured as follows: A distribution cavity is provided inside the die head body. The material injection port is disposed at the top of the die head body corresponding to the distribution cavity and is communicated with the distribution cavity. A plurality of material injection cavities are provided and are evenly disposed inside the die head body. A plurality of discharge ports are provided corresponding to the number of the material injection cavities. The discharge ports are disposed at the bottom of the die head body corresponding to the material injection cavities and are communicated with the corresponding material injection cavities. A plurality of communication ports are opened in the distribution cavity corresponding to the number of the material injection cavities, and the communication ports are communicated with the corresponding material injection cavities.

[0016] By adopting the above technical solution, setting a plurality of material injection cavities and cooperating with the distribution cavity can help the coating die head to distribute the coating material in multiple channels, reduce the possibility of blockage of the coating material, ensure that the coating material discharges evenly from the inside of the coating die head, and improve the coating efficiency.

[0017] In a preferred embodiment, the present application can be further configured as follows: A protective cover is installed on the top of the die head body, and the protective cover is provided with a through hole for an external pipeline to pass through.

[0018] By adopting the above technical solution, a protective cover is provided, which can reduce the possibility of slurry splashing when the external pipeline feeds the injection port, and can protect the injection port from the influence of the external environment.

[0019] In summary, the present application includes at least one of the following beneficial technical effects:

[0020] 1. Under the action of the vibration module, after the slurry enters the injection cavity, it can continuously receive vibration. The bubbles in the slurry merge and break under the action of vibration, or rise to the surface and are released, so as to reduce the number of bubbles, improve the coating uniformity, and at the same time reduce the adhesion of the slurry in the injection cavity to increase the fluidity of the slurry, making the slurry not easy to accumulate and pile up inside the injection cavity, improving the coating stability and saving coating materials. At the same time, the slurry in the injection cavity can be evenly extruded from the discharge port under the vibration and extrusion of the vibration module to complete the coating process.

[0021] 2. According to the piezoelectric effect principle of the piezoelectric ceramic sheet, an electric field is applied to the piezoelectric ceramic sheet through the electrode, so that the piezoelectric ceramic sheet can generate deformation, and the voltage and polarity of the electrode are controlled by the control system to control the direction and intensity of the electric field, thereby controlling the deformation direction and frequency of the piezoelectric ceramic sheet to achieve the vibration function.

[0022] 3. By providing multiple injection cavities, the distribution cavity can help the coating die head to distribute the coating material in multiple channels, reduce the possibility of coating material blockage, ensure the uniform discharge of the coating material from the inside of the coating die head, and improve the coating efficiency. Description of the Drawings

[0023] Figure 1 is the overall structural schematic diagram of the lithium battery coating die head in an embodiment of the present application;

[0024] Figure 2 is another overall structural schematic diagram of the lithium battery coating die head in an embodiment of the present application;

[0025] Figure 3 is the cross-sectional structural schematic diagram of the lithium battery coating die head in an embodiment of the present application;

[0026] Figure 4 is another cross-sectional structural schematic diagram of the lithium battery coating die head in an embodiment of the present application.

[0027] Reference numerals: 1. Die head body; 2. Injection port; 3. Discharge port; 4. Injection cavity; 5. Vibration module; 51. Piezoelectric ceramic sheet; 52. Electrode; 6. Support substrate; 7. Distribution cavity; 8. Communication port; 9. Protective cover; 10. Through hole. Detailed Embodiments

[0028] The exemplary embodiments of the present application will be described below in conjunction with the accompanying drawings. Various details of the embodiments of the present application are included to facilitate understanding, and they should be considered merely exemplary. Therefore, those of ordinary skill in the art should recognize that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of the present application. Similarly, for the sake of clarity and conciseness, the descriptions of well-known functions and structures are omitted below.

[0029] It should be noted that the terms "first", "second", etc. in the present utility model are used to distinguish similar objects and do not necessarily describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances so that the embodiments of the present disclosure described herein can be implemented in an order other than those illustrated or described herein. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure.

[0030] In addition, the term "and / or" herein is merely a description of the association relationship of associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " herein generally represents an "or" relationship between the associated objects before and after, unless otherwise specified.

[0031] A lithium battery coating die head of the present application will be described below with reference to the accompanying drawings.

[0032] Refer to Figures 1 to 4 , the lithium battery coating die head includes a die head body 1. The die head body 1 is provided with a material injection port 2 and a discharge port 3. A material injection cavity 4 is arranged inside the die head body 1. Both the material injection port 2 and the discharge port 3 are communicated with the material injection cavity 4. The slurry in the material injection cavity 4 is discharged through the discharge port 3. A vibration module 5 is arranged in the material injection cavity 4. The vibration module 5 continuously provides a vibration effect on the slurry in the material injection cavity 4. Under the action of the vibration module 5, the slurry can continuously be subjected to the vibration effect after entering the material injection cavity 4. The bubbles in the slurry merge and break under the vibration effect, or rise to the surface and are released, so as to reduce the number of bubbles, improve the coating uniformity, and at the same time can reduce the adhesion of the slurry in the material injection cavity 4 to increase the fluidity of the slurry, so that the slurry is not easy to accumulate and pile up inside the material injection cavity 4, improve the coating stability and save coating materials. At the same time, the slurry in the material injection cavity 4 can be evenly extruded from the discharge port 3 under the vibration and extrusion action of the vibration module 5 to complete the coating process.

[0033] Among them, the vibration module 5 includes a control system (not shown in the figure) and a piezoelectric ceramic sheet 51. Both the upper and lower surfaces of the piezoelectric ceramic sheet 51 are covered with electrodes 52. The electrodes 52 are electrically connected to the piezoelectric ceramic sheet 51 and are controlled and connected to the control system, so as to facilitate the energization of the piezoelectric ceramic sheet 51. According to the piezoelectric effect principle of the piezoelectric ceramic sheet 51, an electric field is applied to the piezoelectric ceramic sheet 51 through the electrodes 52, so that the piezoelectric ceramic sheet 51 can generate deformation. And the voltage and polarity of the electrodes 52 are controlled by the control system to control the direction and intensity of the electric field, thereby controlling the deformation direction and frequency of the piezoelectric ceramic sheet 51 to achieve the vibration function.

[0034] It should be noted that the piezoelectric ceramic sheet 51 is a special type of ceramic material with piezoelectric effect. The piezoelectric effect means that when an electric field is applied, the piezoelectric material will deform, which is common knowledge for those skilled in the art and will not be elaborated here.

[0035] Specifically, in this embodiment, the piezoelectric ceramic sheet 51 is a lead zirconate titanate piezoelectric ceramic sheet 51. The piezoelectric ceramic sheet 51 made of lead zirconate titanate series materials has good stability, can maintain a stable vibration frequency, so that the slurry can receive a stable vibration extrusion effect, thereby improving the coating uniformity and is suitable for the coating working condition. Among them, in this embodiment, the electrodes 52 can be covered on the upper and lower surfaces of the lead zirconate titanate piezoelectric ceramic sheet 51 by electroplating electrical connection method.

[0036] Furthermore, a support substrate 6 is fixedly connected inside the material injection cavity 4. The support substrate 6 is used to support the piezoelectric ceramic sheet 51. By setting the support substrate 6, a support and installation position can be provided for the piezoelectric ceramic sheet 51.

[0037] Furthermore, a distribution cavity 7 is arranged inside the die head body 1. The material injection port 2 is arranged at the top of the die head body 1 corresponding to the position of the distribution cavity 7 and is communicated with the distribution cavity 7. There are multiple material injection cavities 4 and they are evenly arranged inside the die head body 1. The number of discharge ports 3 corresponds to the number of material injection cavities 4. The discharge ports 3 are arranged at the bottom of the die head body 1 corresponding to the position of the material injection cavities 4 and are communicated with the corresponding material injection cavities 4. The distribution cavity 7 is provided with multiple communication ports 8 corresponding to the number of material injection cavities 4. The communication ports 8 are communicated with the corresponding material injection cavities 4. By setting multiple material injection cavities 4 and cooperating with the distribution cavity 7, it can help the coating die to distribute the coating material in multiple channels, reduce the possibility of coating material blockage, ensure the uniform discharge of the coating material from the inside of the coating die, and improve the coating efficiency.

[0038] In addition, a protective cover 9 is installed on the top of the die head body 1. The protective cover 9 is provided with a through hole 10 for the external pipeline to pass through. By setting the protective cover 9, when the external pipeline feeds materials to the material injection port 2, the possibility of slurry splashing can be reduced, and the material injection port 2 can be protected from the external environment.

[0039] The implementation principle of a lithium battery coating die head in an embodiment of the present application is as follows: The slurry enters the distribution cavity 7 through the material injection port 2 at the top of the die head body 1, and enters each material injection cavity 4 through the communication port 8. At this time, the control system detects that the slurry enters the material injection cavity 4 and sends a start signal to the electrode 52 in each material injection cavity 4, so that the electrode 52 drives the piezoelectric ceramic sheet 51 to vibrate continuously. The slurry is extruded from the discharge port 3 under the continuous and uniform vibration of the piezoelectric ceramic sheet 51 to complete the coating process. Among them, the bubbles in the slurry merge and burst under the vibration, or rise to the surface and are released, so as to reduce the number of bubbles, improve the coating uniformity, and at the same time reduce the adhesion of the slurry in the material injection cavity 4, increase the fluidity of the slurry, make the slurry not easy to accumulate and pile up inside the material injection cavity 4, improve the coating stability and save coating materials.

[0040] The above specific implementation manners do not constitute a limitation on the protection scope of the present application. Those skilled in the art should understand that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A lithium battery coating die head, characterized in that: include: A die body (1), wherein the die body (1) is provided with an injection port (2) and a discharge port (3), an injection cavity (4) is provided inside the die body (1), the injection port (2) and the discharge port (3) are both connected to the injection cavity (4), and the slurry in the injection cavity (4) is discharged through the discharge port (3); A vibration module (5), wherein the vibration module (5) is arranged in the injection cavity (4), and the vibration module (5) continuously provides vibration to the slurry in the injection cavity (4).

2. A lithium battery coating die head as claimed in claim 1, characterized in that: The vibration module (5) comprises a control system and a piezoelectric ceramic sheet (51); the upper and lower surfaces of the piezoelectric ceramic sheet (51) are both covered with electrodes (52); the electrodes (52) are electrically connected to the piezoelectric ceramic sheet (51) and are control-connected to the control system.

3. A lithium battery coating die head as claimed in claim 2, characterized in that: The piezoelectric ceramic sheet (51) is a lead zirconate titanate piezoelectric ceramic sheet (51).

4. A lithium battery coating die head as claimed in claim 2, characterized in that: A support substrate (6) is fixedly connected inside the injection cavity (4), and the support substrate (6) is used to support the piezoelectric ceramic sheet (51).

5. A lithium battery coating die head as claimed in claim 1, characterized in that: The die body (1) is provided with a distribution cavity (7) inside, the injection port (2) is arranged at a position corresponding to the distribution cavity (7) on the top of the die body (1) and is connected to the distribution cavity (7), a plurality of injection cavities (4) are provided and are evenly arranged inside the die body (1), a plurality of discharge ports (3) are provided corresponding to the number of injection cavities (4), the discharge port (3) is arranged at a position corresponding to the injection cavity (4) on the bottom of the die body (1) and is connected to the corresponding injection cavity (4), the distribution cavity (7) is provided with a plurality of communication ports (8) corresponding to the number of the injection cavities (4), and the communication ports (8) are connected to the corresponding injection cavities (4).

6. A lithium battery coating die head as claimed in claim 1, characterized in that: A protective cover (9) is installed on the top of the die body (1), and the protective cover (9) is provided with a through hole (10) for an external pipeline to pass through.

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