Coating device and battery diaphragm coating equipment
By incorporating a stirring element within the storage assembly to agitate the slurry, the problem of slurry sedimentation was solved, thereby improving the quality of the diaphragm and the performance of the battery cell.
Patent Information
- Application Number
- CN202422663807.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-01
- Publication Date
- 2026-01-06
- Estimated Expiration
- 2034-11-01
AI Technical Summary
In existing technologies, the slurry is prone to settling during the coating process, causing large particles to adhere to the membrane surface and affecting the membrane quality.
The slurry is agitated by the stirring element in the storage assembly to prevent sedimentation, and the slurry is transferred from the storage chamber to the diaphragm surface by the coating element.
It effectively prevents particle sedimentation in the slurry, improves the quality of the diaphragm, reduces the adhesion of large particles, and enhances the interfacial adhesion of the diaphragm and the stability of the cell's cycle capacity.
Smart Images
Figure CN223761402U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of battery production technology, and in particular to coating apparatus and battery separator coating equipment. Background Technology
[0002] The separator is an important component of power batteries and energy storage batteries. In order to further improve the interfacial adhesion between the separator and the electrode and slow down the decay rate of the cell's cycle capacity, an organic coating is usually applied to the surface of the separator.
[0003] In existing technologies, micro-concave rollers are often used to apply organic coatings to the diaphragm surface. However, whether it is roller coating or spray coating, during the coating process, the suspended emulsion slurry in the slurry box tends to sink to the bottom of the slurry box due to gravity, which is known in the industry as sedimentation. The sedimented particles will gradually increase in size. If large particles adhere to the surface of the diaphragm, it will seriously affect the quality of the diaphragm. Utility Model Content
[0004] The purpose of this invention is to provide a coating device and a battery separator coating equipment, which uses a stirring element to agitate the slurry and prevent the slurry from settling, thereby ensuring the quality of the separator.
[0005] To achieve this objective, the present invention adopts the following technical solution:
[0006] Firstly, a coating apparatus is provided, comprising:
[0007] A material storage assembly, wherein the material storage assembly has a material storage chamber for storing slurry, and a stirring element is movably disposed inside the material storage chamber for stirring the slurry;
[0008] A coating element, rotatably mounted on the storage assembly, the coating element being at least partially located inside the storage cavity, the coating element being used to transfer slurry from inside the storage cavity to outside the storage cavity.
[0009] As an optional technical solution, the stirring element is provided with a plurality of first elements spaced around its periphery.
[0010] As an optional technical solution, the length of the first element is greater than the minimum interval between the stirring element and the coating element, and the first element can selectively contact the surface of the coating element.
[0011] As an optional technical solution, the first element is made of a deformable material.
[0012] As an optional technical solution, the stirring element is rotatably disposed inside the storage chamber;
[0013] Alternatively, the stirring element can be oscillatingly positioned inside the storage chamber;
[0014] Alternatively, the stirring element may be slidably disposed inside the storage chamber.
[0015] As an optional technical solution, when the stirring element is rotatably disposed inside the storage cavity, the rotation center line of the stirring element is a horizontal line;
[0016] When the stirring element is oscillating inside the storage cavity, the oscillation center line of the stirring element is a horizontal line;
[0017] When the stirring element is slidably disposed inside the storage cavity, the sliding direction of the stirring element is parallel to the horizontal line.
[0018] As an optional technical solution, the rotation center line of the coating is located outside the storage cavity.
[0019] As an optional technical solution, the coating component is a gravure roller.
[0020] As an optional technical solution, the material storage assembly includes a material storage box and a scraper. The material storage box is provided with an installation port. The coating part is rotatably disposed at the installation port. The scraper is installed on the side of the material storage box with the installation port. The scraper faces the coating part and forms a discharge gap with the outer wall of the coating part.
[0021] Secondly, a battery separator coating apparatus is provided, including the coating device described above.
[0022] The beneficial effects of this utility model are:
[0023] The coating device of this utility model includes a material storage component and a coating component. The material storage component has a material storage chamber inside, which is used to store slurry. A stirring component is movably arranged inside the material storage chamber, which is used to stir the slurry. The coating component is rotatably installed on the material storage component, and at least part of the coating component is located inside the material storage chamber. The coating component is used to transfer the slurry from the inside of the material storage chamber to the outside of the material storage chamber.
[0024] During the coating process of the diaphragm, the agitator continuously stirs the slurry in the storage chamber, increases the movement speed of the slurry in the storage chamber, fully mixes the slurry, prevents the sedimentation of particles in the slurry, reduces the number of large particles formed, prevents large particles from adhering to the diaphragm surface, and improves the quality of the diaphragm. Attached Figure Description
[0025] Figure 1 This is a schematic diagram of the coating device of this utility model.
[0026] In the picture:
[0027] 1. Material storage assembly; 11. Material storage box; 111. Material storage cavity; 12. Scraper;
[0028] 2. Agitator components;
[0029] 3. Coated parts;
[0030] 4. First component. Detailed Implementation
[0031] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.
[0032] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0033] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0034] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.
[0035] like Figure 1As shown, the coating device provided in this embodiment includes a material storage assembly 1 and a coating element 3. The material storage assembly 1 has a material storage chamber 111 inside, which is used to store slurry. A stirring element 2 is movably arranged inside the material storage chamber 111, which is used to stir the slurry. The coating element 3 is rotatably installed on the material storage assembly 1. The coating element 3 is at least partially located inside the material storage chamber 111. The coating element 3 is used to transfer the slurry from inside the material storage chamber 111 to outside the material storage chamber 111.
[0036] Specifically, during the coating process of the diaphragm, the agitator 2 continuously agitates the slurry in the storage chamber 111, increases the movement speed of the slurry in the storage chamber 111, fully mixes the slurry, prevents the sedimentation of particles in the slurry, reduces the number of large particles formed, prevents large particles from adhering to the diaphragm surface, and improves the quality of the diaphragm.
[0037] The coating component 3 is driven by a motor, and the stirring component 2 is driven by a motor or a cylinder.
[0038] Optionally, the cross-section of the agitator 2 can be circular, rectangular, or other irregular shapes.
[0039] In this embodiment, a portion of the coating member 3 is located inside the storage cavity 111, and another portion of the coating member 3 is located outside the storage cavity 111. The slurry in the storage cavity 111 adheres to the surface of the coating member 3. When the coating member 3 rotates, the slurry can be transferred and adhered to the diaphragm.
[0040] In other embodiments, the coating element 3 consists of multiple components, some of which are disposed inside the storage cavity 111 and others are disposed outside the storage cavity 111. The components are able to transfer slurry between each other, thereby enabling the slurry to be transferred and adhered to the diaphragm.
[0041] Optionally, a plurality of first elements 4 are arranged around the periphery of the agitator 2 at intervals. The plurality of first elements 4 are arranged at intervals around the periphery of the agitator 2. When the agitator 2 moves in the storage chamber 111, the first elements 4 move with the agitator 2, which can improve the agitation effect.
[0042] Optionally, the length of the first element 4 is greater than the minimum interval between the stirring element 2 and the coating element 3, and the first element 4 can selectively contact the surface of the coating element 3. The first element 4 can wipe away particles adhering to the surface of the coating element 3, preventing the coating element 3 from transferring particles to the diaphragm.
[0043] Optionally, the first element 4 is made of a deformable material. When the first element 4 comes into contact with the coating 3, the first element 4 undergoes elastic deformation to prevent the coating 3 from being worn and producing sharp parts, thus avoiding the diaphragm being cut by the coating 3.
[0044] Optionally, the deformable material can be silicone or rubber.
[0045] Optionally, the cross-section of the first element 4 is one of a circle, a semi-circle, a rectangle, or other irregular shapes.
[0046] In some other embodiments, the first element 4 is a brush.
[0047] In this embodiment, the stirring element 2 is rotatably disposed inside the storage chamber 111. The stirring element 2 is driven to rotate by a motor. The small rotation space of the stirring element 2 is beneficial for the miniaturization of the coating device. The rotation center line of the stirring element 2 is parallel to the rotation center line of the coating element 3. The interval distance between the stirring element 2 and the coating element 3 is fixed. The minimum interval distance between the stirring element 2 and the coating element 3 is fixed. The length of the first element 4 extending radially along the stirring element 2 is greater than the minimum interval distance between the stirring element 2 and the coating element 3. In this embodiment, both the stirring element 2 and the coating element 3 are rotating structures, and the cross-sections of both the stirring element 2 and the coating element 3 are circular surfaces.
[0048] In some other embodiments, the agitator 2 is oscillatingly disposed inside the storage chamber 111; the agitator 2 is mounted on one end of a swing rod, the other end of which is connected to the output end of a motor, and the motor drives the agitator 2 to oscillate via the swing rod. The agitator 2 has a separated state away from the coating element 3 and a clean state close to the coating element 3. When the agitator 2 is in the separated state, none of the first elements 4 contact the coating element 3; when the agitator 2 is in the clean state, at least one first element 4 contacts the coating element 3, thereby wiping away particles adhering to the surface of the coating element 3.
[0049] In some other embodiments, the agitator 2 is slidably disposed inside the storage chamber 111. The agitator 2 is driven by a cylinder, which drives the agitator 2 to slide in a straight line.
[0050] In this embodiment, when the agitator 2 is rotatably disposed inside the storage chamber 111, the rotation center line of the agitator 2 is a horizontal line. When the agitator 2 rotates around the horizontal line, the flow velocity of the slurry located directly below the agitator 2 and the first element 4 increases, preventing particles from depositing at the bottom of the storage chamber 111.
[0051] In some other embodiments, when the agitator 2 is oscillating inside the storage chamber 111, the oscillation center line of the agitator 2 is a horizontal line.
[0052] In some other embodiments, when the stirring element 2 is slidably disposed inside the storage cavity 111, the sliding direction of the stirring element 2 is parallel to the horizontal line.
[0053] Optionally, the rotation center line of the coating part 3 is located outside the storage cavity 111.
[0054] Optionally, the coating component 3 is a gravure roller. The surface of the gravure roller is provided with liquid storage texture to ensure the adhesion of the paste to the gravure roller.
[0055] Optionally, the material storage assembly 1 includes a material storage box 11 and a scraper 12. The material storage box 11 is provided with an installation port, and the coating part 3 is rotatably disposed at the installation port. The scraper 12 is installed on the side of the material storage box 11 where the installation port is provided, and the scraper 12 faces the coating part 3 and forms a discharge gap with the outer wall of the coating part 3.
[0056] The scraper 12 can block excess slurry inside the storage chamber 111 to prevent excessive slurry coating. In some embodiments, the scraper 12 can be adjusted and installed in the storage box 11. By adjusting the size of the discharge gap between the scraper 12 and the coating part 3, the amount of slurry coating can be adjusted.
[0057] This embodiment also provides a battery separator coating apparatus, which includes the coating device described above.
[0058] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.
Claims
1. Coating apparatus, characterized in that The application relates to a coating device. The coating device comprises: a storage assembly (1) internally provided with a storage cavity (111) for storing slurry, and a stirring member (2) movably arranged in the storage cavity (111) for stirring the slurry; 2. The coating apparatus of claim 1, wherein, a coating member (3) rotatably arranged in the storage assembly (1) and at least partially located in the storage cavity (111), and used for transferring the slurry from the inside of the storage cavity (111) to the outside of the storage cavity (111).
3. The coating apparatus of claim 2, wherein, A plurality of first elements (4) are arranged at intervals around the periphery of the stirring member (2).
4. The coating apparatus of claim 3, wherein, The length of the first elements (4) is greater than the minimum interval distance between the stirring member (2) and the coating member (3), and the first elements (4) can selectively contact the surface of the coating member (3).
5. The coating apparatus according to any one of claims 1 to 4, characterized in that The first elements (4) are made of deformable material. The stirring member (2) is rotatably arranged in the storage cavity (111). Alternatively, the stirring member (2) is swingably arranged in the storage cavity (111).
6. The coating apparatus of claim 5, wherein, Alternatively, the stirring member (2) is slidably arranged in the storage cavity (111). When the stirring member (2) is rotatably arranged in the storage cavity (111), the rotation center line of the stirring member (2) is a horizontal line. When the stirring member (2) is swingably arranged in the storage cavity (111), the swing center line of the stirring member (2) is a horizontal line.
7. The coating apparatus according to any one of claims 1 to 4, characterized in that When the stirring member (2) is slidably arranged in the storage cavity (111), the sliding direction of the stirring member (2) is parallel to the horizontal line.
8. The coating apparatus of any one of claims 1-4, wherein, The rotation center line of the coating member (3) is located outside the storage cavity (111).
9. The coating apparatus according to any one of claims 1 to 4, characterized in that The coating member (3) is a gravure roller.
10. A battery separator coating apparatus characterized by, The storage assembly (1) comprises a storage box (11) provided with a mounting opening, and a scraper (12) mounted on the side of the storage box (11) provided with the mounting opening, and the coating member (3) is rotatably arranged in the mounting opening, and the scraper (12) faces the coating member (3) and forms a discharging gap with the outer wall of the coating member (3). The application also relates to a coating device comprising the coating device as claimed in any one of claims 1-9.