Lithium battery slurry bubble eliminating device, lithium battery slurry buffer tank and lithium battery slurry

Abstract

The utility model belongs to the technical field of lithium batteries, and particularly provides a lithium battery slurry bubble eliminating device, a lithium battery slurry buffer tank and lithium battery slurry, and the lithium battery slurry bubble eliminating device comprises a tank body and a stirring assembly, the stirring assembly comprises a stirring shaft and a hinge defoaming paddle; the hinge defoaming paddle is fixedly arranged on the stirring shaft; the stirring shaft is rotationally arranged in the tank body. By additionally arranging the hinge defoaming paddle on the stirring shaft, when the stirring shaft rotates, bubbles in slurry are crushed in a physical extrusion mode. And meanwhile, under the layer-by-layer propelling of the multi-layer hinge defoaming paddle, the slurry at the lower part is turned to the surface of the slurry, and is broken under the action of negative pressure vacuum, so that the content of bubbles in the lithium battery slurry is reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of lithium battery, concretely relates to a lithium battery slurry bubble elimination device, lithium battery slurry buffer tank and lithium battery slurry. BACKGROUND

[0002] In the manufacturing process of lithium battery, the quality of slurry preparation plays a key role in the performance of battery, and the existence of bubbles in the slurry preparation and delivery stage can seriously affect the performance of battery.

[0003] The common slurry bubble elimination method in the related art mainly includes using defoaming agent or vacuum stirring and degassing, and the vacuum stirring and degassing method and the vacuum film degassing method can effectively eliminate bubbles in the slurry preparation process, but new bubbles are generated in the slurry pipeline delivery process, especially in the buffer tank and the transfer tank before coating, and due to the design defects of the tank body, effective bubble elimination is difficult, especially for the bubbles in the slurry.

[0004] Therefore, how to eliminate the bubbles generated when the slurry is transferred to the buffer tank is a technical problem to be solved at present.

[0005] It should be noted that the above information disclosed in the background section of the present application is only used to understand the background technology of the present application, and therefore, the above description is not considered as information of prior art. CONTENT OF THE UTILITY MODEL

[0006] The present application provides a lithium battery slurry bubble elimination device, a lithium battery slurry buffer tank and a lithium battery slurry.

[0007] In a first aspect, the present application provides a lithium battery slurry bubble elimination device, which comprises:

[0008] a tank body and a stirring assembly;

[0009] The stirring assembly comprises a stirring shaft and a folding blade defoaming paddle.

[0010] The folding blade defoaming paddle is fixedly arranged on the stirring shaft.

[0011] The stirring shaft is rotatably arranged in the tank body.

[0012] In an optional embodiment, the folding blade defoaming paddle comprises a connecting ring and a blade.

[0013] The blade is fixedly arranged on the side wall of the stirring shaft through the connecting ring.

[0014] In one alternative embodiment, the blades are evenly distributed with a plurality of defoaming mesh holes, and the blades are adapted to push the slurry through the mesh holes when rotating, thereby breaking the air bubbles in the slurry.

[0015] In one alternative embodiment, the blade is tilted and fixed to the connecting ring.

[0016] In one optional embodiment, the blade surface along the rotation direction of the stirring shaft is a concave arc-shaped surface, and the blade is adapted to flip the slurry upward under the drive of the stirring shaft.

[0017] In one alternative embodiment, the number of blades is N, and the N blades are distributed at equal angles along the circumference of the connecting ring.

[0018] In one optional embodiment, the connecting ring includes: a first retaining ring and a second retaining ring;

[0019] The first retaining ring and the second retaining ring are fastened to the stirring shaft and are fixedly connected to the stirring shaft.

[0020] In one optional embodiment, M defoaming blades are provided, and the M defoaming blades are respectively fixed at different heights of the stirring shaft.

[0021] Secondly, this disclosure also provides a lithium battery slurry buffer tank, including a vacuum pump and a lithium battery slurry bubble elimination device as described above.

[0022] The vacuum pump is connected to the tank and is adapted to evacuate the tank.

[0023] Thirdly, embodiments of this disclosure also provide a lithium battery slurry, wherein the lithium battery slurry is stirred and defoamed by the lithium battery slurry bubble elimination device described above.

[0024] The beneficial effects of this invention are that the lithium battery slurry bubble elimination device, the lithium battery slurry buffer tank, and the lithium battery slurry itself, by adding a folded-blade defoaming paddle to the stirring shaft, break up the bubbles in the slurry through physical compression when the stirring shaft rotates. Simultaneously, the slurry at the bottom is turned to the surface by the progressive advancement of the multi-layered folded-blade defoaming paddles, where it breaks up under negative pressure vacuum, thereby reducing the bubble content in the lithium battery slurry.

[0025] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objectives and other advantages of this invention are realized and obtained through the structures particularly pointed out in the description, claims, and drawings.

[0026] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, preferred embodiments are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0027] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0028] Figure 1 A perspective view of a lithium battery slurry bubble elimination device provided in an embodiment of this disclosure.

[0029] Figure 2 A cross-sectional view of a lithium battery slurry bubble elimination device provided in an embodiment of this disclosure.

[0030] In the diagram: 100, tank body; 200, stirring assembly; 210, stirring shaft; 220, folding blade defoaming impeller; 221, connecting ring; 221a, first retaining ring; 221b, second retaining ring; 222, blade; 222a, mesh. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0032] The following detailed description, with reference to the accompanying drawings, describes some embodiments of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0033] See Figure 1 , Figure 1 A device for eliminating air bubbles in lithium battery slurry is shown, comprising: a tank 100 and a stirring assembly 200; the stirring assembly 200 includes a stirring shaft 210 and a defoaming impeller 220; the defoaming impeller 220 is fixedly mounted on the stirring shaft 210; the stirring shaft 210 is rotatably mounted inside the tank 100. By adding the defoaming impeller 220 to the stirring shaft 210, air bubbles in the slurry are broken up by physical compression when the stirring shaft 210 rotates.

[0034] Please continue reading. Figures 1-2 In some embodiments, the defoaming impeller 220 includes a connecting ring 221 and blades 222; the blades 222 are fixedly disposed on the side wall of the stirring shaft 210 by the connecting ring 221.

[0035] The blades 222 are evenly distributed with multiple defoaming mesh holes 222a, and the blades 222 are adapted to push the slurry through the mesh holes 222a when rotating, thereby breaking the air bubbles in the slurry. When the stirring shaft 210 rotates, it drives the blades 222 to rotate, thereby forcing the slurry through the mesh holes 222a, and the air bubbles in the slurry are broken under the physical compression of the mesh holes 222a.

[0036] Please continue reading. Figure 2 In a preferred embodiment, the blade 222 is obliquely fixed to the connecting ring 221. The blade surface of the blade 222 along the rotation direction of the stirring shaft 210 is a concave arc-shaped surface, and the blade 222 is adapted to agitate the slurry upwards under the drive of the stirring shaft 210.

[0037] It should be noted that the curved surface can be, but is not limited to, formed by bending a long strip of material along its width, bending a long strip of material along its length, or twisting a long strip of material along its length. In other embodiments, any curved surface shape that allows the slurry to be turned upwards is within the scope of protection of this embodiment. Furthermore, the bending and twisting described above are only for describing the curved surface and not for limiting the process. When manufacturing the blades, processes such as injection molding and stamping can be used.

[0038] Since the blades 222 are inclined on the connecting ring 221, when the blades 222 rotate, they can turn the slurry upward, causing the lower part of the slurry to turn to the surface of the slurry and break it under the negative pressure vacuum inside the tank 100, thereby greatly reducing the bubble content in the slurry.

[0039] In some embodiments, the number of blades 222 is N, and the N blades 222 are distributed at equal angles along the circumference of the connecting ring 221. It should be noted that, in order to ensure the agitation effect of the slurry, at least one of the N blades 222 is not provided with a mesh 222a.

[0040] Please continue reading. Figure 2 In some embodiments, the connecting ring 221 includes a first retaining ring 221a and a second retaining ring 221b; the first retaining ring 221a and the second retaining ring 221b are fastened to the stirring shaft 210 and are fixedly connected to the stirring shaft 210. The installation method using the first retaining ring 221a and the second retaining ring 221b for fastening facilitates the installation of the equipment.

[0041] To ensure effective slurry agitation, some embodiments employ a layer-by-layer agitation method. Specifically, M defoaming blades 220 are provided, each fixedly positioned at a different height on the stirring shaft 210. With the layer-by-layer advancement of the multiple defoaming blades 220, the lower slurry is agitated to the surface and broken up under negative pressure vacuum, thereby reducing the bubble content in the lithium battery slurry.

[0042] At least one embodiment also provides a lithium battery slurry buffer tank, comprising: a vacuum pump and a lithium battery slurry bubble elimination device as described above; the vacuum pump is connected to the tank body 100 and is adapted to evacuate the tank body 100. By evacuating the tank body 100 using the vacuum pump, a negative pressure vacuum is formed within the tank body 100.

[0043] At least one embodiment also provides a lithium battery slurry, which is stirred and defoamed by a lithium battery slurry bubble elimination device as described above.

[0044] In summary, this utility model provides a lithium battery slurry bubble elimination device, a lithium battery slurry buffer tank, and lithium battery slurry. The lithium battery slurry bubble elimination device includes a tank body 100 and a stirring assembly 200. The stirring assembly 200 includes a stirring shaft 210 and a defoaming blade 220. The defoaming blade 220 is fixedly mounted on the stirring shaft 210. The stirring shaft 210 is rotatably mounted within the tank body 100. By adding the defoaming blade 220 to the stirring shaft 210, bubbles in the slurry are broken up through physical compression when the stirring shaft 210 rotates. Simultaneously, the progressive advancement of the multiple layers of defoaming blades 220 stirs the lower slurry to the surface, where it breaks up under negative pressure vacuum, thereby reducing the bubble content in the lithium battery slurry.

[0045] In the description of the embodiments of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of 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.

[0046] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, 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, and therefore should not be construed as a limitation of this utility model. Furthermore, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence unless expressly indicated herein. Therefore, without departing from the teachings of the exemplary embodiments, the first element, component, region, layer, or segment discussed above may be referred to as the second element, component, region, layer, or segment.

[0047] Spatially relative terms, such as “inside,” “outside,” “below,” “below,” “down,” “above,” “up,” etc., may be used herein to describe the relationship between one element or feature illustrated in the figures and another element or feature. In addition to the orientations depicted in the figures, spatially relative terms may be intended to cover different orientations of the device in use or operation. For example, if the device in the figure is flipped, an element described as “below” or “below” other elements or features would be oriented as “above” other elements or features. Thus, the example term “below” can cover both above and below orientations. The device may be oriented in other ways (rotated 90 degrees or in other orientations), and the spatially relative descriptors used herein are interpreted accordingly.

[0048] In the above discussion, unless otherwise stated, when used to describe numerical values, the terms “about,” “approximately,” “basically,” etc., indicate a change of + / - 10% in that value.

[0049] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A device for eliminating air bubbles in lithium battery slurry, characterized in that, include: Tank body and mixing components; The stirring assembly includes a stirring shaft and a defoaming blade; The folding defoaming impeller is fixedly mounted on the stirring shaft; The stirring shaft is rotatably mounted inside the tank.

2. The lithium battery slurry bubble elimination device as described in claim 1, characterized in that, The folding defoaming paddle includes a connecting ring and blades; The blades are fixedly mounted on the side wall of the stirring shaft via a connecting ring.

3. The lithium battery slurry bubble elimination device as described in claim 2, characterized in that, The blades are evenly distributed with multiple defoaming mesh holes, and the blades are adapted to push the slurry through the mesh holes when rotating, thereby breaking the air bubbles in the slurry.

4. The lithium battery slurry bubble elimination device as described in claim 2, characterized in that, The blade is fixed at an angle to the connecting ring.

5. The lithium battery slurry bubble elimination device as described in claim 2, characterized in that, The blade surface along the direction of rotation of the stirring shaft is a concave arc surface, and the blade is adapted to turn the slurry upward under the drive of the stirring shaft.

6. The lithium battery slurry bubble elimination device as described in claim 2, characterized in that, The number of blades is N, and the N blades are distributed at equal angles along the circumference of the connecting ring; At least one of the blades did not have mesh openings.

7. The lithium battery slurry bubble elimination device as described in claim 2, characterized in that, The connecting ring includes: a first retaining ring and a second retaining ring; The first retaining ring and the second retaining ring are fastened to the stirring shaft and are fixedly connected to the stirring shaft.

8. The lithium battery slurry bubble elimination device as described in claim 1, characterized in that, M defoaming blades are provided, and the M defoaming blades are respectively fixed at different heights of the stirring shaft.

9. A lithium battery slurry buffer tank, characterized in that, include: Vacuum pump and lithium battery slurry bubble elimination device as described in any one of claims 1-8; The vacuum pump is connected to the tank and is adapted to evacuate the tank.

10. A lithium battery slurry, characterized in that, The lithium battery slurry is stirred and defoamed using the lithium battery slurry bubble elimination device as described in any one of claims 1-8.

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