Blowing device attached to coating die head and coating equipment

Abstract

The utility model discloses an air blowing device attached to a coating die head and coating equipment. The air blowing device comprises a fixed frame, a main box body, a barrier strip and a baffle, the fixing frame is used for being connected with an external coating die head, the main box body is rotationally connected with the fixing frame, a cavity is formed in the main box body, an air inlet and an air outlet which are communicated with the cavity are formed in the main box body, the blocking strip is connected with the main box body, and the air inlet and the air outlet are communicated with the cavity. The blocking strip can be movably adjusted in the first direction relative to the main box body, the air outlet width of the air outlet is adjusted by blocking the air outlet in the first direction, and the baffle is connected with the main box body. The baffle can be movably adjusted in the second direction relative to the main box body, and the height size of the air outlet is adjusted by shielding the air outlet in the second direction. The technical problem that in the prior art, when a thick electrode is manufactured, the density of a longitudinal surface coated with active slurry is not uniform or transverse stripes appear is mainly solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of coating, especially a kind of blowing device and coating equipment attached to coating die. BACKGROUND

[0002] With the improvement of lithium ion battery energy density, higher requirements are put forward for the design of pole piece, and thick electrode can provide higher energy, because it can load more active substances on unit area. However, there are many problems in the manufacturing process of thick electrode, and there are longitudinal surface density unevenness and horizontal stripes in the coating process, which leads to poor coating quality and is difficult to produce high-quality thick pole piece. In order to solve the above problems, the current technical personnel adjusts and optimizes from the equipment and process angle, but the improvement effect of adjusting coating equipment and oven parameters is not obvious, and the debugging process takes a long time, and at the same time causes serious waste of active slurry, and this problem cannot be effectively solved by process optimization.

[0003] Therefore, it is necessary to improve the prior art. INVENTION CONTENTS

[0004] The utility model provides a kind of blowing device and coating equipment attached to coating die, mainly solve the technical problems of longitudinal surface density unevenness or horizontal stripe of active slurry coating when thick electrode is manufactured in prior art.

[0005] To achieve the above purpose, the utility model provides the following technical scheme:

[0006] A kind of blowing device attached to coating die, including fixed frame, main box body, baffle and baffle;

[0007] The fixed frame is used to connect with the coating die outside, the main box body is rotatably connected with the fixed frame, the cavity is provided in the main box body, the air inlet and the air outlet are provided on the main box body respectively and are communicated with the cavity, the baffle is connected with the main box body, the baffle can be adjusted along the first direction relative to the main box body and the air outlet width of the air outlet is adjusted by shielding the air outlet in the first direction, the baffle is connected with the main box body, and the height size of the air outlet is adjusted by shielding the air outlet in the second direction relative to the main box body.

[0008] In one of the technical solutions, the adjusting component includes a baffle, which can be adjusted along the first direction relative to the main box body and is used to adjust the air outlet width of the air outlet by shielding the air outlet in the first direction.

[0009] In one of the technical solutions, the adjusting component comprises a baffle plate, which is movable in the second direction relative to the main box body and used for shielding the air outlet in the second direction to adjust the height dimension of the air outlet.

[0010] In one of the technical solutions, the main box body is provided with a slot between the air outlet and the cavity, the slot being in communication with the air outlet and the cavity respectively, and the baffle plate being inserted into the slot.

[0011] In one of the technical solutions, the air blowing device comprises two baffle plates, which are arranged on opposite sides of the main box body and are both inserted into the slot.

[0012] In one of the technical solutions, the main box body is provided with a first inclined surface inclined upward in a direction close to the air outlet at a position adjacent to the air outlet, and an end of the baffle plate close to the air outlet is provided with a second inclined surface inclined downward in a direction close to the air outlet, the first inclined surface and the second inclined surface jointly forming a V-shaped air outlet channel in communication with the air outlet.

[0013] In one of the technical solutions, the baffle plate has a closed position when being adjusted relative to the main box body, in which the baffle plate blocks the air outlet so that the air outlet cannot blow air outward.

[0014] In one of the technical solutions, the baffle plate is provided with a plurality of guide blocks, the main box body is provided with a plurality of guide grooves extending in the second direction, the guide blocks are inserted into the guide grooves, and a first fastener is connected between the baffle plate and the main box body.

[0015] In one of the technical solutions, the guide blocks are dovetail blocks, and the guide grooves are dovetail grooves.

[0016] In one of the technical solutions, the end of the main box body is fixed with a second fastener, the fixing frame is provided with a through rotating hole, the second fastener is arranged in the rotating hole, and the second fastener is used for fixing the fixing frame and the main box body.

[0017] In one of the technical solutions, the fixing frame comprises two tripods, the tripods are both provided with the rotating hole, one end of the main box body in the first direction is rotationally connected with one of the tripods, and the other end of the main box body in the first direction is rotationally connected with the other tripod.

[0018] The application also provides a coating device, comprising a coating machine body, a coating die head and the air blowing device described above, the coating machine body is connected with the coating die head and is used for pumping active paste into the coating die head, the coating die head is used for coating the active paste outward, and the air blowing device is connected with the coating die head.

[0019] Compared with the prior art, the air blowing device attached to the coating die head has at least the following beneficial effects:

[0020] The air blowing device can blow air to the pole piece immediately after the coating die head coats the active paste on the foil, the air blowing direction of the air blowing device can be adjusted by adjusting the rotating posture of the main box body relative to the fixing frame, the air outlet width of the air blowing device can be changed by adjusting the position of the blocking strip, and the height of the air outlet of the air blowing device can be changed by adjusting the position of the baffle, that is, the air blowing direction, the air blowing position and the air blowing area (which can also be the air flow rate of the air blowing, and the air blowing area and the air flow rate are inversely proportional) of the air blowing device can be adjusted, the air can be blown to the pole piece at the required air outlet angle, the required width area and the required air flow rate by using the air blowing device, and since the wet film formed on the surface of the active paste after coating and before baking has a certain flowability, the film surface of the active paste will be offset after air flow disturbance, the active paste in the area with high coating weight will be blown to the abnormal area, thereby improving the problem of uneven longitudinal surface density of the active paste after coating or the problem of transverse stripes, and the manufacturability and output rate of the thick pole piece are greatly improved. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0022] Figure 1 A structure schematic view of the air blowing device attached to the coating die head provided by the embodiment of the present application;

[0023] Figure 2 A structure schematic view of the air blowing device attached to the coating die head provided by the embodiment of the present application; Figure 1 A local enlarged view of A in the figure;

[0024] Figure 3 A structure schematic view of the air blowing device attached to the coating die head provided by the embodiment of the present application from another angle;

[0025] Figure 4An internal structure diagram of a blowing device attached to a coating die provided by an embodiment of the present application is shown in the figure.

[0026] Figure 5 An internal structure diagram of a blowing device attached to a coating die provided by an embodiment of the present application is shown in the figure. Figure 4 An internal structure diagram of a blowing device attached to a coating die provided by an embodiment of the present application is shown in the figure.

[0027] Figure 6 An internal structure diagram of a blowing device attached to a coating die provided by an embodiment of the present application is shown in the figure. Figure 4 An internal structure diagram of a blowing device attached to a coating die provided by an embodiment of the present application is shown in the figure.

[0028] Figure 7 An internal structure diagram of a blowing device attached to a coating die provided by an embodiment of the present application is shown in the figure.

[0029] Reference signs:

[0030] 1, fixed frame; 11, tripod; 111, rotating hole; 2, main box body; 21, cavity; 22, air inlet; 23, air outlet; 24, insertion slot; 25, first inclined surface; 26, guide groove; 3, blocking strip; 4, baffle; 41, second inclined surface; 42, guide block; 5, V-shaped air outlet channel; 6, first fastener; 7, second fastener. DETAILED DESCRIPTION

[0031] In order to make the technical problems, technical solutions and beneficial effects of the present application clearer, the present application will be further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not to limit the present application.

[0032] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0033] It should be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0034] In addition, the terms "first", "second", "third", etc. are used only for descriptive purposes and are not to be construed as indicating or implying relative importance or an ordered ranking of the indicated technical features. Thus, features defined with "first", "second" or "third" can explicitly or implicitly include one or more of such features. In the description of the present application, the meaning of "a plurality" is two or more, unless otherwise expressly and specifically limited.

[0035] In order to make the purpose, technical scheme and advantages of the utility model clearer, the utility model will be further described in detail below with reference to the drawings and examples.

[0036] Please refer to Figures 1 to 7 The utility model discloses a kind of blowing device attached to coating die, which mainly includes fixed frame 1, main box 2, baffle 3 and baffle 4, wherein, fixed frame 1 is used to and external coating die fixed connection, wherein, cavity 21 is provided in main box 2, main box 2 is also provided with the gas inlet 22 and gas outlet 23 that are communicated with cavity 21 respectively, the gas inlet 22 is used to and external gas pump connection, the gas outlet 23 is used for gas to blow out, baffle 3 is connected with main box 2, baffle 3 is movable in first direction X relative to main box 2 and is adjusted, and the gas outlet width of gas outlet 23 is adjusted by shielding gas outlet 23 in first direction X, baffle 4 is connected with main box 2, and baffle 4 is movable in second direction Z relative to main box 2 and is adjusted, and the height dimension of gas outlet 23 is adjusted by shielding gas outlet 23 in second direction Z.

[0037] Specifically, the present scheme designs a blowing device that can be connected on coating die, the blowing device has blowing function, so that when coating die coats active paste on foil, blowing device can immediately blow polar piece. The blowing direction, blowing position, blowing area (also can be understood as the gas flow rate of blowing, blowing area and gas flow rate are inversely proportional) of the blowing device of the present scheme can be adjusted, using the blowing device, gas can be blown to polar piece at required air angle, specified width area and required gas flow rate, since wet film formed on the surface of active paste after coating and before baking has certain flowability, so after air flow disturbance, film surface of active paste will be offset, and active paste in high coating area will be blown to abnormal area, so as to improve the problem of uneven longitudinal surface density of active paste after coating or the problem of horizontal stripe, and further greatly improve the manufacturability and output rate of thick polar piece.

[0038] Please refer to Figure 4 AndFigure 5 The main box 2 is provided with a slot 24 between the air outlet 23 and the cavity 21, the slot 24 is actually communicated with the cavity 21 and the air outlet 23 respectively, and the blocking strip 3 is inserted into the slot 24 to change the air outlet width of the air outlet 23, so as to meet the purpose that the air blowing device can blow the specified width area on the pole piece. Alternatively, the slot 24 extends through the main box 2 along the first direction X, and the air blowing device of the embodiment includes two blocking strips 3, which are respectively arranged on the opposite sides of the main box 2 in the first direction X and are inserted into the slot 24, and the width of the air outlet 23 in the first direction X can be adjusted by pulling the two blocking strips 3. By designing two blocking strips 3, when the air outlet width of the air outlet 23 needs to be large, the blocking strip 3 on one side will not be too long outwardly, avoiding that the air blowing device occupies too much space volume in the first direction X.

[0039] Please refer to Figure 5 The main box 2 is provided with a first inclined surface 25 which is inclined upward along the direction close to the air outlet 23 at the position adjacent to the air outlet 23, and the end of the baffle 4 close to the air outlet 23 is provided with a second inclined surface 41 which is inclined downward along the direction close to the air outlet 23, the first inclined surface 25 and the second inclined surface 41 jointly form a V-shaped air outlet channel 5 which is communicated with the air outlet 23, by such design, the gas can be gathered on the surface of the foil, and the wet film morphology can be better adjusted. When the air blowing device is not used, the baffle 4 can be adjusted downward to a closed position which blocks the air outlet 23, at this time, the air outlet 23 cannot blow air outward, preventing foreign matters from entering the cavity 21 of the main box 2 from the air outlet 23. Figure 6

[0040] Please refer to Figure 6 and Figure 7 The baffle 4 is provided with a plurality of guide blocks 42, and the main box 2 is provided with a plurality of guide grooves 26 which extend along the second direction Z, the guide blocks 42 are inserted into the guide grooves 26, so that the baffle 4 can be adjusted and slid along the second direction Z, and when the adjustment is completed, the baffle 4 can be fixed on the main box 2 by the first fastener 6 (such as a bolt) connected between the baffle 4 and the main box 2. Among them, the shape of the guide block 42 is preferably dovetail, and correspondingly, the guide groove 26 is dovetail groove.

[0041] Please refer to Figure 1 and Figure 2 ​The end of the main box body 2 is fixed with a second fastener 7, the fixing frame 1 is provided with a through rotating hole 111, the rotating hole 111 can be circular in shape, the main box body 2 is arranged in the rotating hole 111 through the second fastener 7, so that the rotating connection between the main box body 2 and the fixing frame 1 is realized, the second fastener 7 is preferably a bolt, when the main box body 2 is rotated to a specified angle, the main box body 2 can be fixed on the fixing frame 1 by screwing the second fastener 7. Preferably, the fixing frame 1 specifically comprises three tripods 11, each of the three tripods 11 is provided with the rotating hole 111, one end of the main box body 2 along the first direction X is arranged in the rotating hole 111 of one of the three tripods 11 through the second fastener 7, and the other end of the main box body 2 along the first direction X is also arranged in the rotating hole 111 of the other of the three tripods 11 through the second fastener 7, so that the two ends of the main box body 2 are rotatable relative to the two three tripods 11.

[0042] The embodiment also provides a coating device, which comprises a coating machine body, a coating die head and the air blowing device, wherein the coating machine body is connected with the coating die head and is used for pumping active paste into the coating die head, for example, the coating machine body comprises a tank and a delivery pump connected with each other, the tank is used for storing the active paste, the delivery pump is connected with the coating die head and is used for pumping the active paste in the tank to the coating die head, the coating die head is provided with a coating port, the active paste is sent out from the coating port of the coating die head and is coated on the positive or negative foil, and the air blowing device is fixedly connected with the coating die head, so that the air blowing device can blow air on the pole piece immediately after the coating die head coats the active paste on the foil, thereby improving the problem of uneven longitudinal area density or the problem of horizontal stripes after the active paste is coated, and the manufacturability and output rate of the thick pole piece are greatly improved.

[0043] The above is only a preferred embodiment of the present application, and only the technical principle of the present application is specifically described, and these descriptions are only for explaining the principle of the present application, and cannot be explained as the limitation of the protection scope of the present application in any way. Based on the explanation herein, any modification, equivalent replacement and improvement within the spirit and principle of the present application, and other specific embodiments of the present application that can be thought by those skilled in the art without creative labor, should be included in the protection scope of the present application.

Claims

1. A blowing device attached to a coating die, characterized by, It comprises a fixed frame (1), a main box (2), a baffle (3) and a baffle plate (4). The fixed frame (1) is used for connecting with an external coating die head, the main box (2) is rotationally connected with the fixed frame (1), the main box (2) is provided with a cavity (21) inside, the main box (2) is provided with an air inlet (22) and an air outlet (23) which respectively communicate with the cavity (21), the baffle (3) is connected with the main box (2), the baffle (3) is movable and adjustable in a first direction relative to the main box (2) and the air outlet width of the air outlet (23) is adjusted by shielding the air outlet (23) in the first direction, the baffle plate (4) is connected with the main box (2), and the baffle plate (4) is movable and adjustable in a second direction relative to the main box (2) and the height dimension of the air outlet (23) is adjusted by shielding the air outlet (23) in the second direction.

2. The coating die with air blowing device according to claim 1, wherein The main box (2) is provided with a slot (24) between the air outlet (23) and the cavity (21), the slot (24) respectively communicates with the air outlet (23) and the cavity (21), and the baffle (3) is inserted into the slot (24).

3. The air blowing device attached to the coating die according to claim 2, wherein The air blowing device comprises two baffles (3), the slot (24) penetrates through the main box (2) in the first direction, and the two baffles (3) are respectively arranged on the opposite sides of the main box (2) in the first direction and are inserted into the slot (24).

4. The coating die with air blowing device according to claim 1, wherein The main box (2) is provided with a first inclined surface (25) which inclines upward in a direction close to the air outlet (23) at a position adjacent to the air outlet (23), one end of the baffle plate (4) towards the air outlet (23) is provided with a second inclined surface (41) which inclines downward in a direction close to the air outlet (23), and the first inclined surface (25) and the second inclined surface (41) jointly form a V-shaped air outlet channel (5) which communicates with the air outlet (23).

5. The air blowing device attached to the coating die according to claim 1, wherein The baffle plate (4) has a closed position when being adjusted relative to the main box (2), in which the baffle plate (4) blocks the air outlet (23) so that the air outlet (23) cannot blow air outward.

6. The air blowing device attached to the coating die according to claim 1, wherein The baffle plate (4) is provided with a plurality of guide blocks (42), the main box (2) is provided with a plurality of guide grooves (26) extending in the second direction, the guide blocks (42) are inserted into the guide grooves (26), and a first fastener (6) is connected between the baffle plate (4) and the main box (2).

7. The air blowing device attached to the coating die according to claim 6, wherein The guide blocks (42) are dovetail blocks, and the guide grooves (26) are dovetail grooves.

8. The coating die with air blowing device according to claim 1, wherein The end of the main box (2) is fixed with a second fastener (7), the fixed frame (1) is provided with a rotation hole (111) penetrating through, the second fastener (7) is arranged in the rotation hole (111), and the second fastener (7) is used for fixing the fixed frame (1) and the main box (2).

9. The air blowing device attached to the coating die according to claim 8, wherein The fixing frame (1) comprises two tripods (11), the two tripods (11) are both provided with the rotating hole (111), one end of the main box (2) along a first direction is rotationally connected with one of the tripods (11), and the other end of the main box (2) along the first direction is rotationally connected with the other tripod (11).

10. A coating apparatus characterized by comprising: A coating machine body, a coating die, and a blowing device attached to the coating die according to any one of claims 1 to 9, the coating machine body being connected to the coating die and used for pumping active paste into the coating die, the coating die being used for coating the active paste outward, and the blowing device being connected to the coating die.

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