Coating device and coating machine

Abstract

The utility model discloses a coating device and a coating machine, the coating device is used for coating a coating to a surface A of a pole piece and a surface B opposite to the surface A. The coating device comprises a surface A coating die head, a surface B coating die head and an air flow generating unit, the surface A coating die head is used for coating the coating to the surface A, and the surface B coating die head is used for coating the coating to the surface B; the B surface coating die head is used for coating the coating to the B surface; wherein the A-side coating die head and the B-side coating die head are sequentially arranged in the pole piece conveying direction; the airflow generation unit is used for limiting the pole piece to move in the direction away from the B-side coating die head through airflow; wherein the airflow generating unit is arranged between the A-side coating die head and the B-side coating die head; and / or the airflow generating units are opposite to each other and are spaced from the B-side coating die head; and / or the B-surface coating die head and the airflow generation unit are sequentially arranged along the pole piece conveying direction. The airflow generation unit can make the pole piece more stable, the probability of coating failure of the B-side coating die head is reduced, and then the coating quality and production efficiency of the pole piece are improved.

Description

Technical Field

[0001] The utility model relates to the field of coating equipment, in particular to a coating device and a coating machine. Background Art

[0002] The coating and drying devices used in traditional electrode production are mostly single-sided coating, that is, after completing the coating on one side, it needs to be dried before coating the other side, and finally dried again, which increases the number of oven sections, increases costs, and reduces production efficiency. To solve the above problems, a double-layer coating equipment can be used to coat both sides of the electrode and dry the coated electrodes on both sides at the same time.

[0003] Normally, in a double-layer coating device, the second die head along the electrode conveying direction usually adopts an upturned coating die head with the discharge slit facing upward to realize the slurry coating on the back side of the electrode. Because the front side of the electrode is coated with wet material that has not yet solidified, the electrode is prone to shaking during the coating process. When the electrode shakes and deviates upward, the slurry squeezed from top to bottom from the upturned coating die head cannot rise to the deviated electrode under the action of gravity, resulting in coating failure. Utility Model Content

[0004] The present invention aims to solve at least one of the technical problems in the prior art. To this end, the present invention provides a coating device that can improve coating quality and production efficiency.

[0005] A coating machine having the coating device is also provided.

[0006] According to the first embodiment of the present invention, a coating device for coating a surface A of a pole piece and a surface B opposite to the surface A comprises:

[0007] A-side coating die head, used for applying coating to said A-side;

[0008] A B-side coating die head, used for applying coating to the B-side;

[0009] Wherein, the A-side coating die head and the B-side coating die head are sequentially arranged along the electrode conveying direction;

[0010] an airflow generating unit, the airflow generating unit being configured to restrict the pole piece from moving in a direction away from the B-side coating die head through airflow;

[0011] Wherein, the airflow generating unit is provided between the A-side coating die head and the B-side coating die head;

[0012] and / or, the airflow generating unit is opposite to and spaced apart from the B-side coating die head;

[0013] And / or, the B-side coating die head and the airflow generating unit are arranged in sequence along the electrode conveying direction.

[0014] According to the coating device of the embodiment of the first aspect of the utility model, there are at least the following beneficial effects: the first air flotation component limits the movement of the electrode in the direction away from the B-side coating die, so that the cooperation between the electrode and the B-side coating die is more stable, reducing the probability of coating failure of the B-side coating die, thereby improving the coating quality and production efficiency of the electrode.

[0015] According to some embodiments of the present invention, the airflow generating unit includes a first air flotation component, and the first air flotation component is used to limit the movement of the pole piece in a direction away from the B-side coating die by generating an airflow;

[0016] Wherein, the first air flotation component and the B-side coating die head are sequentially arranged along the electrode conveying direction;

[0017] And / or, the air flow generating unit includes a second air flotation component, and the second air flotation component is used to limit the movement of the pole piece in a direction away from the B-side coating die by generating air flow.

[0018] According to some embodiments of the present invention, the first air flotation assembly includes a first air flotation member, which is disposed on the side where the A surface is located and has a first air blowing port facing the A surface.

[0019] According to some embodiments of the present invention, the first air flotation assembly includes a second air flotation component, which is arranged on the side where the B surface is located and has a first air suction port facing the B surface.

[0020] According to some embodiments of the present invention, the first air floating assembly further includes a second air floating member provided on the side where the B surface is located, and provided with a second air blowing port facing the B surface, the second air floating member is opposite to the first air floating member, and together with the first air floating member, air floats and clamps the electrode;

[0021] According to some embodiments of the present invention, the first air flotation component further includes a roller arranged on the side where the B surface is located, the outer peripheral surface of the roller abuts against the B surface, the roller is opposite to the first air flotation part, and clamps the pole piece together with the first air flotation part.

[0022] According to some embodiments of the present invention, the first air flotation component includes a first air flotation part, which is arranged on the side where the A surface is located and has a second air suction port facing the A surface. The first air flotation part is opposite to the second air flotation part and together with the second air flotation part, absorbs and clamps the pole piece.

[0023] According to some embodiments of the present invention, the second air flotation assembly includes a third air flotation component, which is arranged on the side where the A surface is located and has a third air blowing port facing the A surface.

[0024] According to some embodiments of the present invention, the second air flotation assembly includes a fourth air flotation component, which is arranged on the side where the B surface is located and has a third air suction port facing the B surface.

[0025] According to some embodiments of the present invention, the second air flotation component includes a fourth air flotation component arranged on the side where the B surface is located, and is provided with a fourth air blowing port facing the B surface. The fourth air flotation component is opposite to the third air flotation component, and the fourth air flotation component and the third air flotation component together air-float and clamp the pole piece.

[0026] According to some embodiments of the present invention, the second air flotation component includes a third air flotation component, which is arranged on the side where the A surface is located and has a fourth air suction port facing the A surface. The third air flotation component is opposite to the fourth air flotation component and together with the fourth air flotation component, absorbs and clamps the electrode.

[0027] According to some embodiments of the present invention, the B-side coating die head includes a coating portion and an abutment portion connected to the coating portion, the coating portion is used to apply coating to the B-side, and the abutment portion abuts against the B-side.

[0028] According to some embodiments of the present invention, the coating device further includes a transmission roller group, and the transmission roller group is arranged between the A-side coating die head and the airflow generating unit.

[0029] According to some embodiments of the present invention, the airflow generating unit includes a third air flotation component opposite to and spaced apart from the B-side coating die head, and the third air flotation component is used to limit the movement of the pole piece in a direction away from the B-side coating die head by blowing out airflow.

[0030] According to some embodiments of the present invention, the coating direction of the B-side coating die head is set in the vertical direction.

[0031] According to an embodiment of the second aspect of the present invention, the coating machine includes: the coating device and the drying device described in the first aspect, which are arranged in sequence along the electrode conveying direction.

[0032] The coating machine according to the embodiment of the second aspect of the present invention has at least the following beneficial effects: the coating device in the embodiment of the first aspect is used to improve the quality and production efficiency of the electrode coating.

[0033] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0035] Figure 1 This is a schematic structural diagram of a first embodiment of a coating device according to an embodiment of the present invention;

[0036] Figure 2 This is a schematic structural diagram of a second embodiment of a coating device according to an embodiment of the present invention;

[0037] Figure 3 This is a schematic structural diagram of a third embodiment of a coating device according to an embodiment of the present invention;

[0038] Figure 4 This is a schematic structural diagram of a fourth embodiment of a coating device according to an embodiment of the present invention;

[0039] Figure 5 This is a schematic structural diagram of a fifth embodiment of a coating device according to an embodiment of the present invention;

[0040] Figure 6 This is a schematic structural diagram of a sixth embodiment of a coating device according to an embodiment of the present invention;

[0041] Figure 7 This is an enlarged structural schematic diagram of the B-side coating die head in the coating device of an embodiment of the present utility model.

[0042] Figure Number:

[0043] Pole piece 100;

[0044] A side coating die 200;

[0045] B-side coating die head 300; coating unit 310; contact unit 320;

[0046] First air floating assembly 410; first air floating component 411; second air floating component 412; second air floating assembly 420; third air floating component 421; fourth air floating component 422; third air floating assembly 430;

[0047] Transmission roller set 500. DETAILED DESCRIPTION

[0048] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0049] In the description of the present invention, it should be understood that descriptions involving orientation, such as the orientation or positional relationship indicated by up, down, etc., are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0050] In the description of this utility model, "a number" refers to one or more, and "a plurality" refers to two or more. The use of "first" or "second" is solely for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of the indicated technical features, or implicitly indicating the order of the indicated technical features.

[0051] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0052] In the related art, the electrode includes opposite sides A and B, and both sides A and B need to be coated with paint. The paint can be the positive electrode material or the negative electrode material of the battery. In the process of double-sided coating of the electrode, side A is coated with paint first, and then side B is coated with paint. When coating side B, because side A has undried paint, if it is in direct contact with side A, the paint on side A will be damaged, affecting the quality of the electrode; if side A is not restricted, the electrode will fluctuate toward the side where side A is located, which will reduce the coating accuracy of side B and affect the quality of the electrode.

[0053] Based on this, refer to Figures 1 to 4 As shown, the first embodiment of the present invention proposes a coating device for coating the A side of the pole piece 100 and the B side relative to the A side. The coating device includes: an A side coating die head, a B side coating die head and an airflow generating unit.

[0054] The A-side coating die 200 is used to apply coating to the A-side; the B-side coating die 300 is used to apply coating to the B-side; wherein, the A-side coating die 200 and the B-side coating die 300 are arranged in sequence along the conveying direction of the pole piece 100. In this embodiment, the A-side coating die 200 and the B-side coating die 300 are both slit extrusion coating dies. The A-side coating die 200 and the B-side coating die 300 can be moved away from or close to the surface of the pole piece 100 under the control of the electrical system, and the lip position of the A-side coating die 200 and the B-side coating die 300 is provided with a distance meter, so that the lip can maintain an appropriate coating gap with the surface of the pole piece 100, which is convenient for the A-side coating die 200 and the B-side coating die 300 to perform coating.

[0055] The airflow generating unit is used to limit the movement of the electrode 100 in the direction away from the B-side coating die 300 through airflow; the airflow generating unit is connected to the external air source, and supports the A-side of the electrode 100 through gas, so that the airflow generating unit is neither in direct contact with the coating on the A-side to ensure the integrity of the coating on the A-side, but can also limit the A-side, and it is difficult for the electrode 100 to move in the direction away from the B-side coating die 300 toward the side where the A-side is located, making the electrode 100 more stable, making the coating of the B-side coating die 300 more stable, reducing the probability of coating failure of the B-side coating die 300, and thereby improving the coating quality and production efficiency of the electrode 100.

[0056] Specifically, the airflow generating unit is arranged between the A-side coating die 200 and the B-side coating die 300, so that the electrode piece 100 that is about to enter the position of the B-side coating die 300 is not easy to move in the direction away from the B-side coating die 300; and / or, the airflow generating unit is relative to and spaced from the B-side coating die 300, so that the electrode piece 100 being coated by the B-side coating die 300 is also not easy to move in the direction away from the B-side coating die 300; and / or, the B-side coating die 300 and the airflow generating unit are arranged in sequence along the conveying direction of the electrode piece 100, so that the electrode piece 100 that has just left the B-side coating die 300 is not easy to move in the direction away from the B-side coating die 300.

[0057] Reference Figures 1 to 4As shown, in some embodiments of the present invention, the coating device includes a first air flotation component 410 and a second air flotation component 420, and the first air flotation component 410 and the second air flotation component 420 are used to limit the movement of the pole piece 100 in a direction away from the B-side coating die 300 by generating an air flow, wherein the first air flotation component 410 and the B-side coating die 300 are arranged in sequence along the conveying direction of the pole piece 100; the air flow generating unit includes a second air flotation component 420, and the second air flotation component 420 is used to limit the movement of the pole piece 100 in a direction away from the B-side coating die 300 by generating an air flow; wherein the B-side coating die 300 and the second air flotation component 420 are arranged in sequence along the conveying direction of the pole piece 100.

[0058] It is worth understanding that, along the conveying direction of the electrode 100, the first air flotation component 410 and the second air flotation component 420 respectively restrict the electrode 100 from moving in the direction away from the B-side coating die 300 on both sides of the B-side coating die 300. The first air flotation component 410 makes it difficult for the electrode 100 that is about to enter the position of the B-side coating die 300 to move in the direction away from the B-side coating die 300, and the second air flotation component 420 makes it difficult for the electrode 100 that has just left the B-side coating die 300 to move in the direction away from the B-side coating die 300, thereby making it difficult for the electrode 100 that is located between the first air flotation component 410 and the second air flotation component 420 and is being coated by the B-side coating die 300 to move in the direction away from the B-side coating die 300, thereby further improving the stability of the electrode 100 during the B-side coating process, thereby improving the coating quality and production efficiency of the electrode 100.

[0059] In this embodiment, the first air flotation assembly 410 or the second air flotation assembly 420 can blow air toward the electrode 100, restricting the electrode 100 from moving away from the B-side coating die 300 through an air film, or the first air flotation assembly 410 or the second air flotation assembly 420 can draw air toward the electrode 100, creating a negative pressure below atmospheric pressure, thereby restricting the electrode 100 from moving away from the B-side coating die 300 through atmospheric pressure. The airflow generated by the first air flotation assembly 410 and the second air flotation assembly 420 can be the same or different. The first air flotation member 411 is an air flotation roller or other device with air flotation function or a negative pressure adsorption roller.

[0060] In this embodiment, a separate first air flotation assembly 410 may be disposed between the A-side coating die 200 and the B-side coating die 300 , or a separate second air flotation assembly 420 may be disposed behind the B-side coating die 300 along the electrode conveying direction.

[0061] Reference Figure 1 and Figure 2As shown, in some specific embodiments of the present invention, the first air floating assembly 410 includes a first air floating member 411. The first air floating member 411 is arranged on the side where the A surface is located and has a first blowing port facing the A surface.

[0062] In this embodiment, the first air-floating member 411 is an air-floating roller. A plurality of air-floating holes are defined on the outer circumference of the first air-floating member 411. Ports are defined at each end of the first air-floating member 411, each port connected to the air-floating holes. The ports are used to communicate with an external air source. Clean air can be introduced into the first air-floating member 411, where it flows out through the air-floating holes. The air flowing out of the air-floating holes forms a highly rigid and uniform air film on the surface of the first air-floating member 411. This air film supports the A-side of the electrode 100 while preventing direct contact between the first air-floating member 411 and the coating on the A-side of the electrode 100, thereby ensuring the coating quality of the electrode 100. Furthermore, the first air-floating member 411 restricts movement of the electrode 100 away from the B-side coating die 300, thereby maintaining a more stable gap between the B-side coating die 300 and the electrode 100 and improving the coating quality of the B-side coating die 300. The number of first air-floating members 411 can be one or more.

[0063] Reference Figure 3 and Figure 4 As shown, in some specific embodiments of the present invention, the first air flotation component 410 also includes a second air flotation component 412 arranged on the side where the B surface is located, and is provided with a second air blowing port facing the B surface. The second air flotation component 412 is opposite to the first air flotation component 411, and together with the first air flotation component 411, air-floats and clamps the pole piece 100.

[0064] In this embodiment, the principle of the second air floating component 412 for suspending and supporting the electrode piece 100 is the same as the principle of the first air floating component 411 for suspending and supporting the electrode piece 100. The specific structure of the second air floating component 412 can be the same as or different from that of the first air floating component 411, and its specific model can be selected according to actual needs.

[0065] Alternatively, the first air floating assembly 410 further includes a roller disposed on the side where the B surface is located, the outer circumference of the roller abuts against the B surface, the roller is opposite to the first air floating member 411, and clamps the electrode 100 together with the first air floating member 411;

[0066] In this embodiment, the roller is a conventional roller, and the outer peripheral surface of the roller directly contacts the B surface of the pole piece 100 and abuts against the B surface of the supporting pole piece 100 .

[0067] Alternatively, the first air floating component 410 further includes a second air floating member 412 provided on the side where the B surface is located. The second air floating member 412 has an air intake facing the B surface. The second air floating member 412 is opposite to the first air floating member 411 and clamps the electrode 100 together with the first air floating member 411.

[0068] In this embodiment, the second air-floating member 412 is a roller member, and it adsorbs the electrode 100 by means of negative pressure to support the B side of the electrode 100. The outer peripheral surface of the second air-floating member 412 is defined with a plurality of adsorption holes, and the two ends of the second air-floating member 412 are respectively defined with a communication port, which is connected to the adsorption holes. The interface is used to connect to an exhaust source, which can be a vacuum pump. The exhaust source draws in external air from the adsorption holes, so that the adsorption holes can form a negative pressure between the adsorption holes and the B side of the electrode 100, thereby adsorbing the B side of the electrode 100. At the same time, the second air-floating member 412 can rotate to switch between different adsorption holes and the electrode 100 for adsorption, while transporting the electrode 100 along the conveying direction.

[0069] The number of pairs of the first air-floating member 411 and the second air-floating member 412, and the number of pairs of the first air-floating member 411 and the roller can be one or more. As another embodiment, the first air-floating member 411 and the second air-floating member 412 can also be staggered along the conveying direction of the electrode piece 100, or the first air-floating member 411 and the roller can be staggered along the conveying direction of the electrode piece 100.

[0070] It is worth understanding that the first air flotation member 411 and the second air flotation member 412 are arranged relative to each other, so that the first air flotation member 411 and the second air flotation member 412 air flotation clamp the electrode 100, and the A side and B side of the electrode 100 are simultaneously subjected to the air flotation clamping force, so that the electrode 100 can move more stably along the conveying direction, and the electrode 100 is not easy to move in the direction away from the B side coating die 300, nor is it easy to move in the direction toward the B side coating die 300. The coating gap between the electrode 100 and the lip of the B side coating die 300 is more stable, and the B side coating die 300 can more stably coat the B side of the electrode 100. The overall coating quality of the electrode 100 is higher and the production efficiency is higher.

[0071] Reference Figure 1 and Figure 2 As shown, in some specific embodiments of the present invention, the first air flotation component 410 includes a second air flotation component 412, which is arranged on the side where the B surface is located and has a first air suction port facing the B surface to adsorb the B surface of the electrode 100 with negative pressure.

[0072] It is worth understanding that the second air float part 412 restricts the movement of the pole piece 100 in the direction away from the B-side coating die 300 by performing negative pressure adsorption on the B-side of the pole piece 100. The coating gap between the pole piece 100 and the lip of the B-side coating die 300 is more stable, and the B-side coating die 300 can coat the B-side of the pole piece 100 more stably. The overall coating quality of the pole piece 100 is higher and the production efficiency is higher.

[0073] Reference Figure 1 and Figure 2 As shown, in some specific embodiments of the present invention, the first air flotation component 410 also includes a first air flotation part 411, which is arranged on the side where the A surface is located and has a second air suction port facing the A surface. The first air flotation part 411 is opposite to the second air flotation part 412, and together with the second air flotation part 412, it adsorbs and clamps the electrode 100.

[0074] It is worth understanding that the first air flotation component 410 and the second air flotation component 420 are arranged opposite to each other, and negative pressure adsorption is performed on the electrode 100 at the same time. The A side and the B side of the electrode 100 are simultaneously subjected to the adsorption clamping force, so that the electrode 100 can move more stably along the conveying direction. The electrode 100 is not easy to move in the direction away from the B side coating die 300, nor is it easy to move in the direction toward the B side coating die 300. The coating gap between the electrode 100 and the lip of the B side coating die 300 is more stable, and the B side coating die 300 can coat the B side of the electrode 100 more stably. The overall coating quality of the electrode 100 is higher and the production efficiency is higher.

[0075] Reference Figure 1 and Figure 2 As shown, in some specific embodiments of the present invention, the second air floating assembly 420 includes a third air floating component 421, which is arranged on the side where the A surface is located and has a third blowing port facing the A surface.

[0076] In this embodiment, the principle of the third air floating component 421 suspending and supporting the electrode piece 100 is the same as the principle of the first air floating component 411 suspending and supporting the electrode piece 100. The specific structure of the third air floating component 421 can be the same as or different from that of the first air floating component 411, and its specific model can be selected according to actual needs.

[0077] It is worth understanding that the third air flotation member 421 is arranged on the side where the A side of the pole piece 100 is located. The third air flotation member 421 is used to limit the pole piece 100 from moving in a direction away from the B side coating die 300 after passing through the B side coating die 300, so that the B side coating die 300 can coat the B side of the pole piece 100 more stably.

[0078] It should be noted that the third air-floating member 421 and the first air-floating member 411 may both restrict the B surface of the electrode piece 100 , or the third air-floating member 421 alone may restrict the B surface of the electrode piece 100 .

[0079] Reference Figure 3 and Figure 4As shown, in some specific embodiments of the present invention, the second air flotation component 420 includes a fourth air flotation component 422 arranged on the side where the B surface is located, and is provided with a fourth air blowing port facing the B surface. The fourth air flotation component 422 is opposite to the third air flotation component 421, and the fourth air flotation component 422 and the third air flotation component 421 together flotate and clamp the electrode 100.

[0080] In this embodiment, the principle of the fourth air floating component 422 for suspending and supporting the electrode piece 100 is the same as the principle of the first air floating component 411 for suspending and supporting the electrode piece 100. The specific structure of the fourth air floating component 422 can be the same as or different from that of the first air floating component 411, and its specific model can be selected according to actual needs.

[0081] It is worth understanding that the third air flotation member 421 and the fourth air flotation member 422 are arranged relative to each other, so that the third air flotation member 421 and the fourth air flotation member 422 air-float clamp the electrode 100, and the A side and B side of the electrode 100 are simultaneously subjected to the air-float clamping force, so that the electrode 100 can move more stably along the conveying direction, and the electrode 100 is not easy to move in the direction away from the B side coating die 300, nor is it easy to move in the direction toward the B side coating die 300. The coating gap between the electrode 100 and the lip of the B side coating die 300 is more stable, and the B side coating die 300 can more stably coat the B side of the electrode 100. The overall coating quality of the electrode 100 is higher and the production efficiency is higher.

[0082] It should be noted that the first air floating member 411, the third air floating member 421 and the fourth air floating member 422 can restrict the electrode 100 together, or the first air floating member 411, the second air floating member 412, the third air floating member 421 and the fourth air floating member 422 can restrict the electrode 100 together, or the third air floating member 421 and the fourth air floating member 422 can restrict the electrode 100 alone.

[0083] Reference Figure 1 and Figure 2 As shown, in some specific embodiments of the present invention, the second air floating assembly 420 includes a fourth air floating component 422, which is arranged on the side where the B surface is located and has a second air intake facing the B surface.

[0084] In this embodiment, the principle of the fourth air floating member 422 adsorbing and fixing the electrode 100 is the same as the principle of the second air floating member 412 under negative pressure adsorption. The specific structure of the fourth air floating member 422 can be the same as or different from that of the second air floating member 412, and its specific model can be selected according to actual needs.

[0085] It is worth understanding that the fourth air float part 422 restricts the movement of the pole piece 100 in a direction away from the B-side coating die 300 by performing negative pressure adsorption on the B-side of the pole piece 100. The coating gap between the pole piece 100 and the lip of the B-side coating die 300 is more stable, and the B-side coating die 300 can coat the B-side of the pole piece 100 more stably. The overall coating quality of the pole piece 100 is higher and the production efficiency is higher.

[0086] It should be noted that the fourth air-floating member 422 and the second air-floating member 412 may jointly restrict the B surface of the electrode piece 100 , or the fourth air-floating member 422 alone may restrict the B surface of the electrode piece 100 .

[0087] Reference Figure 1 and Figure 2 As shown, in some specific embodiments of the present invention, the second air flotation component 420 includes a third air flotation component 421, which is arranged on the side where the A surface is located and is provided with a fourth air suction port facing the A surface. The third air flotation component 421 is opposite to the fourth air flotation component 422, and together with the fourth air flotation component 422, it adsorbs and clamps the electrode 100.

[0088] In this embodiment, the principle of the third air floating component 421 adsorbing and fixing the electrode 100 is the same as the principle of the second air floating component 412 adsorbing and fixing the electrode 100. The specific structure of the third air floating component 421 can be the same as or different from the second air floating component 412, and its specific model can be selected according to actual needs.

[0089] It is worth understanding that the third air flotation member 421 and the fourth air flotation member 422 are arranged relative to each other, so that the third air flotation member 421 and the fourth air flotation member 422 simultaneously perform negative pressure adsorption on the electrode 100, and the A side and B side of the electrode 100 are simultaneously subjected to the adsorption clamping force, so that the electrode 100 can move more stably along the conveying direction, and the electrode 100 is not easy to move in the direction away from the B side coating die 300, nor is it easy to move in the direction toward the B side coating die 300. The coating gap between the electrode 100 and the lip of the B side coating die 300 is more stable, and the B side coating die 300 can more stably coat the B side of the electrode 100. The overall coating quality of the electrode 100 is higher and the production efficiency is higher.

[0090] It should be noted that the second air floating member 412, the third air floating member 421 and the fourth air floating member 422 can restrict the electrode 100 together, or the first air floating member 411, the second air floating member 412, the third air floating member 421 and the fourth air floating member 422 can restrict the electrode 100 together, or the third air floating member 421 and the fourth air floating member 422 can restrict the electrode 100 alone.

[0091] Reference Figure 7 As shown, in some embodiments of the present invention, the B-side coating die head 300 includes a coating portion 310 and an abutting portion 320 connected to the coating portion 310 . The coating portion 310 is used to apply coating to the B-side, and the abutting portion 320 abuts against the B-side.

[0092] It is worth understanding that the abutment portion 320 abuts against the B side of the pole piece 100 to limit the movement of the pole piece 100 toward the side where the B side is located, so that the pole piece 100 can neither move in the direction away from the B side nor move toward the side where the B side is located. The transportation of the pole piece 100 is more stable, and the coating gap between the pole piece 100 and the coating portion 310 of the B side coating die 300 is more stable. The B side coating die 300 can coat the B side of the pole piece 100 more stably, and the overall coating quality of the pole piece 100 is higher and the production efficiency is higher.

[0093] Reference Figure 1 and Figure 2 As shown, in some embodiments of the present invention, the coating device further includes a transmission roller set 500, and the transmission roller set 500 is arranged between the A-side coating die head 200 and the airflow generating unit.

[0094] It is worth understanding that the transmission roller set 500 is used to adjust the tension of the pole piece 100 and can be turned toward the pole piece 100 so that the pole piece 100 can be adjusted to different directions.

[0095] In this embodiment, the transmission roller group 500 is in direct contact with the B side of the pole piece 100 and supports the B side of the pole piece 100 to adjust the direction of the pole piece 100. As another embodiment, the transmission roller group 500 includes an air float roller or a roller, wherein the air float roller supports the A side or the B side of the pole piece 100, and the roller supports the B side of the pole piece 100. The transmission roller group 500 is arranged between the A side coating die 200 and the first air float component 410. In other words, the first air float component 410 is located between the transmission roller group 500 and the B side coating die 300, so that the position of the first air float component 411 is closer to the B side coating die, which facilitates the control of the stability of the pole piece 100 being coated by the B side coating die.

[0096] Reference Figure 1 and Figure 2 As shown, in some specific embodiments of the present invention, the B-side coating die head 300 is a top-down coating die head or a bottom-down coating die head, and the coating direction of the B-side coating die head 300 is set in the vertical direction. The A-side coating die head 200 is a side-coating die head, and the coating direction of the A-side coating die head 200 is set in the horizontal direction.

[0097] Specifically, an upturned coating die head means that the coating direction is basically vertically upward, and the coating needs to overcome gravity; a face-down coating die head means that the coating direction is basically vertically downward, and can be directly coated on the surface of the electrode 100; a side-coating die head means that the coating direction is basically horizontal.

[0098] As another embodiment, the B-side coating die 300 may also be a side coating die, and the A-side coating die 200 may also be a face-down coating die or a face-down coating die.

[0099] Reference Figure 5 and Figure 6 As shown, in some specific embodiments of the present invention, the airflow generating unit includes a third air flotation component 430 opposite to and spaced apart from the B-side coating die 300, and the third air flotation component 430 is used to limit the movement of the pole piece 100 in a direction away from the B-side coating die 300 by blowing out airflow.

[0100] In this embodiment, the third air flotation component 430 is arranged opposite to the B-side coating die 300. The third air flotation component 430 and the B-side coating die 300 clamp the electrode 100 together. The third air flotation component 430 uses gas to suspend the A-side of the electrode 100, so that the third air flotation component 430 is neither in direct contact with the coating on the A-side to ensure the integrity of the A-side coating, but can also limit the A-side. It is difficult for the electrode 100 to move toward the side where the A-side is located in the direction away from the B-side coating die 300, so that the coating gap between the B-side coating die 300 and the electrode 100 can remain stable, thereby improving the stability of the B-side coating die 300 and improving the coating quality and production efficiency of the electrode 100.

[0101] The coating direction of the B-side coating die head 300 is set along the vertical direction. The B-side coating die head 300 is specifically a top-down coating die head or a bottom-down coating die head.

[0102] A second embodiment of the present invention provides a coating machine, comprising: a coating device and a drying device according to the first embodiment, arranged sequentially along the conveying direction of the electrode 100. It is worth noting that the coating machine employing the coating device according to the first embodiment can improve the coating quality and production efficiency of the electrode 100.

[0103] In this embodiment, after the coating is completed, the coating device directly dries the coating on the A and B sides of the electrode 100 through the drying device, saving the space occupied by the dryer and improving the production efficiency of the electrode 100, thereby improving the overall production efficiency of the coating.

[0104] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A coating device, characterized in that: Used to apply paint to the A side of the electrode and the B side relative to the A side, including: A-side coating die head, used for applying coating to said A-side; A B-side coating die head, used for applying coating to the B-side; Wherein, the A-side coating die head and the B-side coating die head are sequentially arranged along the electrode conveying direction; an airflow generating unit, the airflow generating unit being configured to restrict the pole piece from moving in a direction away from the B-side coating die head through airflow; Wherein, the airflow generating unit is provided between the A-side coating die head and the B-side coating die head; and / or, the airflow generating unit is opposite to and spaced apart from the B-side coating die head; And / or, the B-side coating die head and the airflow generating unit are arranged in sequence along the electrode conveying direction.

2. The coating device according to claim 1, characterized in that: The air flow generating unit includes a first air flotation component, which is used to limit the movement of the electrode piece in a direction away from the B-side coating die by generating air flow; Wherein, the first air flotation component and the B-side coating die head are sequentially arranged along the electrode conveying direction; And / or, the air flow generating unit includes a second air flotation component, the second air flotation component is used to limit the movement of the pole piece in a direction away from the B-side coating die by generating air flow; Wherein, the B-side coating die head and the second air flotation assembly are arranged in sequence along the electrode conveying direction.

3. The coating device according to claim 2, characterized in that: The first air flotation assembly includes a first air flotation member, which is arranged on the side where the A surface is located and has a first air blowing port facing the A surface.

4. The coating device according to claim 2, characterized in that: The first air floating component includes a second air floating component, which is arranged on the side where the B surface is located and has a first air suction port facing the B surface.

5. The coating device according to claim 3, characterized in that: The first air floating component further includes a second air floating part provided on the side where the B surface is located, and is provided with a second air blowing port facing the B surface. The second air floating part is opposite to the first air floating part and together with the first air floating part, air floats and clamps the electrode.

6. The coating device according to claim 3, characterized in that: The first air floating component further includes a roller disposed on the side where the B surface is located, the outer peripheral surface of the roller abuts against the B surface, the roller is opposite to the first air floating part, and clamps the pole piece together with the first air floating part.

7. The coating device according to claim 4, characterized in that: The first air floating component includes a first air floating part, which is arranged on the side where the A surface is located and has a second air suction port facing the A surface. The first air floating part is opposite to the second air floating part and together with the second air floating part, absorbs and clamps the electrode.

8. The coating device according to any one of claims 2 to 6, characterized in that: The second air flotation assembly includes a third air flotation component, which is arranged on the side where the A surface is located and has a third air blowing port facing the A surface.

9. The coating device according to any one of claims 2 to 6, characterized in that: The second air flotation assembly includes a fourth air flotation component, which is arranged on the side where the B surface is located and has a third air suction port facing the B surface.

10. The coating device according to claim 8, characterized in that: The second air floating component includes a fourth air floating part arranged on the side where the B surface is located, and is provided with a fourth blowing port facing the B surface. The fourth air floating part is opposite to the third air floating part and together with the third air floating part, air floats and clamps the electrode.

11. The coating device according to claim 9, characterized in that: The second air floating component includes a third air floating part, which is arranged on the side where the A surface is located and has a fourth air suction port facing the A surface. The third air floating part is opposite to the fourth air floating part and together with the fourth air floating part, absorbs and clamps the electrode.

12. The coating device according to claim 1, characterized in that: The B-side coating die head includes a coating portion and an abutting portion connected to the coating portion, wherein the coating portion is used to apply coating to the B-side, and the abutting portion abuts against the B-side.

13. The coating device according to claim 1, characterized in that: The coating device further includes a transmission roller group, which is arranged between the A-side coating die head and the airflow generating unit.

14. The coating device according to claim 1 or 2, characterized in that: The airflow generating unit includes a third air floatation component opposite to and spaced apart from the B-side coating die head, and the third air floatation component is used for restricting the pole piece from moving in a direction away from the B-side coating die head by blowing out airflow.

15. The coating device according to claim 1, characterized in that: The coating direction of the B-side coating die head is arranged along the vertical direction.

16. A coating machine, characterized in that: include: The coating device and drying device according to any one of claims 1 to 15 are arranged in sequence along the electrode conveying direction.

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